Journal of Engineering for Gas Turbines and Power-transactions of The Asme最新文献_第8页

Investigation of Fuel and Load Flexibility of an Atmospheric Single Nozzle Jet-Stabilized FLOX® Combustor with Hydrogen/methane-Air Mixtures 含氢/甲烷-空气混合物的大气单喷嘴射流稳定FLOX®燃烧器燃料和负载灵活性研究

4区工程技术

Journal of Engineering for Gas Turbines and Power-transactions of The Asme Pub Date : 2023-10-16 DOI: 10.1115/1.4063782

Niklas Petry, Manu Mannazhi, Zhiyao Yin, Oliver Lammel, Klaus Peter Geigle, Andreas Huber

{"title":"Investigation of Fuel and Load Flexibility of an Atmospheric Single Nozzle Jet-Stabilized FLOX® Combustor with Hydrogen/methane-Air Mixtures","authors":"Niklas Petry, Manu Mannazhi, Zhiyao Yin, Oliver Lammel, Klaus Peter Geigle, Andreas Huber","doi":"10.1115/1.4063782","DOIUrl":"https://doi.org/10.1115/1.4063782","url":null,"abstract":"Abstract In this work, a coaxial fuel nozzle was installed concentrically inside the outer air nozzle and was arranged in two different configurations. In the first, non-premixed case, the fuel and air nozzles were flush at the nozzle exit. In the second, partially premixed case, the fuel nozzle terminated 50 mm below the air nozzle exit. A third, fully premixed case was achieved by injecting fuel into an inline-mixer in the air 1 m upstream of the nozzle exit. Additionally, measurements were performed using fuel nozzles with two different sizes (inner diameters = 2 and 1.5 mm). For all these cases, percentage of hydrogen in the fuel was varied from 0 to 100 % (constant equivalence ratio, f = 0.74, thermal power Pth = 10.5 kW, jet exit velocity was kept at about vexit = 100 m/s at an air preheating Tpre = 300 K) and the resulting flames were characterized using 2D OH* chemiluminescence measurements. In addition, load-flexibility was investigated on the 100 % H2 case by varying the equivalence ratio (f = 0.74 to 0.21). Some selected conditions were further investigated using particle imaging velocimetry (PIV) to obtain velocity fields. The experimental results demonstrated a strong influence of nozzle configurations (mixedness), equivalence ratio and H2-content on flame shapes. Furhtermore, the results from this work are being used in a joint effort to validate numerical models for jet-stabilized hydrogen combustion.","PeriodicalId":15685,"journal":{"name":"Journal of Engineering for Gas Turbines and Power-transactions of The Asme","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136116760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Identification of Dynamic Force Coefficients for an Additively Manufactured Hermetic Squeeze Film Bearing Support Damper Utilizing a Pass-Through Channel 采用直通通道的增材制造密封挤压膜轴承支撑阻尼器的动力系数辨识

4区工程技术

Journal of Engineering for Gas Turbines and Power-transactions of The Asme Pub Date : 2023-10-14 DOI: 10.1115/1.4063781

Bugra Ertas, Keith Gary, Thomas Adcock

{"title":"Identification of Dynamic Force Coefficients for an Additively Manufactured Hermetic Squeeze Film Bearing Support Damper Utilizing a Pass-Through Channel","authors":"Bugra Ertas, Keith Gary, Thomas Adcock","doi":"10.1115/1.4063781","DOIUrl":"https://doi.org/10.1115/1.4063781","url":null,"abstract":"Abstract The following paper presents breakthrough experimental results for a new hermetic squeeze film damper (HSFD) concept that is integrally designed within an externally pressurized tilting-pad radial gas bearing support. The flexibly damped gas bearing module was designed for a 7.2\" (183 mm) diameter shaft and fabricated using direct metal laser melting (DMLM); also known as additive manufacturing. The bearing and HSFD were sized based on ongoing studies for oil-free super-critical carbon dioxide (sCO2) power turbines in the 8.5MW-10MW power range. The development of the new damper concept was motivated by past dynamic testing on HSFD, which generated frequency dependent stiffness and damping force coefficients. In efforts to eliminate the frequency dependency, a new HSFD architecture was conceived that adds accumulator volumes and a pass-through channel to previously conceived HSFD flow network designs. The other motivation of the work is the need for developing a cost-effective and reliable oil-free bearing technology that is scalable to large power turbomachinery applications. There were several objectives to the following work. The first objective was to successfully design and fabricate a single piece bearing-damper using additive manufacturing, while dimensionally controlling critical design features. The paper discusses the manufacturing steps and shows cut-ups that reveal adequate clearance control capability with internal damper clearances.","PeriodicalId":15685,"journal":{"name":"Journal of Engineering for Gas Turbines and Power-transactions of The Asme","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135804161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Techno-Economic Analysis of the Solid Oxide Semi-Closed CO2 Cycle and Comparison with Other Power Generation Cycles with CO2 Capture 固体氧化物半封闭CO2循环的技术经济分析及与其他CO2捕集发电循环的比较

4区工程技术

Journal of Engineering for Gas Turbines and Power-transactions of The Asme Pub Date : 2023-10-13 DOI: 10.1115/1.4063740

Matteo Martinelli, Roberto Scaccabarozzi, Manuele Gatti, Stefano Campanari, Emanuele Martelli

{"title":"Techno-Economic Analysis of the Solid Oxide Semi-Closed CO2 Cycle and Comparison with Other Power Generation Cycles with CO2 Capture","authors":"Matteo Martinelli, Roberto Scaccabarozzi, Manuele Gatti, Stefano Campanari, Emanuele Martelli","doi":"10.1115/1.4063740","DOIUrl":"https://doi.org/10.1115/1.4063740","url":null,"abstract":"Abstract This work presents the techno-economic analysis of the Solid oxide semi-closed CO2 cycle (SOS-CO2), a hybrid semiclosed cycle with solid oxide fuel cells (SOFC) recently developed by Politecnico di Milano for power generation from natural gas with near-zero CO2 emissions. The cycle is able to achieve an outstanding net electric efficiency of 75.7%, capturing more than 99% of the generated CO2. All the cycles components have been designed and sized with the aim of assessing performance and capital cost. Performance and economic key performance indicators are compared with those of two benchmark technologies for power generation with CO2 capture: the Allam cycle and a combined cycle equipped with ammines for post-combustion capture. Moreover, a sensitivity analysis is performed on the forecasted cost of natural gas and SOFC stacks. The results indicate that the specific total capital requirement of the SOS-CO2 cycle (2.52k€/kWel) is considerably higher than the Allam cycle (1.93 k€/kWel) and combined cycle with post-combustion capture (1.98 k€/kWel). On the other hand, the SOS-CO2 cycle benefits from its far higher efficiency (73.3% vs. 53.9% of the Allam cycle and 52.8% of the combined cycle) which makes the cycle less sensitive to the fuel cost and CO2 tax. In terms of cost of electricity, the SOS-CO2 cycle results the best technology for natural gas prices above 8 €/GJ, while the Allam cycle appears to be the preferred option at lower prices.","PeriodicalId":15685,"journal":{"name":"Journal of Engineering for Gas Turbines and Power-transactions of The Asme","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135917932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Application of a Multidisciplinary Design Process to Assess the Influence of Requirements and Constraints On the Design of Military Engines 应用多学科设计过程评估军用发动机设计中需求和约束的影响

4区工程技术

Journal of Engineering for Gas Turbines and Power-transactions of The Asme Pub Date : 2023-10-13 DOI: 10.1115/1.4063742

Tomasz Matuschek, Tom Otten, Sebastian Zenkner, Richard-Gregor Becker, Jacopo Zamboni, Erwin Moerland

{"title":"Application of a Multidisciplinary Design Process to Assess the Influence of Requirements and Constraints On the Design of Military Engines","authors":"Tomasz Matuschek, Tom Otten, Sebastian Zenkner, Richard-Gregor Becker, Jacopo Zamboni, Erwin Moerland","doi":"10.1115/1.4063742","DOIUrl":"https://doi.org/10.1115/1.4063742","url":null,"abstract":"Abstract The design of supersonic military aircraft is a complex multidisciplinary optimization (MDO) process in which the dependencies and strong interactions between engine and aircraft must be imperatively considered. Applying a fully coupled propulsion-airframe design system is a highly challenging task, since it requires a set of numerically stable analysis tools capable of optimizing multiple design variables simultaneously. To improve computational efficiency, the application of low-fidelity design of experiment (DOE) methods aid in narrowing down the selection of suitable combinations of design parameters. This approach allows the division of the multidisciplinary process into subsystems, each of which can be served by specialized engineers. Interactions between the disciplines are then considered by exchanging DOE-based sensitivities. This paper presents the multidisciplinary design process developed at the German Aerospace Center (DLR), - in which the airframe and propulsion system are designed simultaneously whilst effectively utilizing DOE-based sensitivities. Guiding the work is an application case on the preliminary design of military engine concepts considering its effects on overall integrated aircraft architecture. The design process is used to investigate the influence of important engine parameters such as overall pressure ratio (OPR), bypass ratio (BPR) and turbine entry temperature (T4) on the design of military aircraft. Furthermore, the impacts of thrust requirements and technological constraints of the engine are analyzed","PeriodicalId":15685,"journal":{"name":"Journal of Engineering for Gas Turbines and Power-transactions of The Asme","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135918244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical Analysis of Flame Shape Impact On the Performance of Fuel Staging in a Lean-Burn Aeronautical Burner 细燃式航空燃烧器火焰形状对燃料分级性能影响的数值分析

4区工程技术

Journal of Engineering for Gas Turbines and Power-transactions of The Asme Pub Date : 2023-10-13 DOI: 10.1115/1.4063741

Leo C. C. Mesquita, Aymeric Vié, Sébastien Ducruix

{"title":"Numerical Analysis of Flame Shape Impact On the Performance of Fuel Staging in a Lean-Burn Aeronautical Burner","authors":"Leo C. C. Mesquita, Aymeric Vié, Sébastien Ducruix","doi":"10.1115/1.4063741","DOIUrl":"https://doi.org/10.1115/1.4063741","url":null,"abstract":"Abstract The BIMER combustor is a lab-scale burner investigating fuel staging techniques as a stabilisation strategy for lean premixed prevaporized combustion for aeronautical applications. Two stages compose its injection system: the pilot and the multipoint stages. The staging factor is defined as the ratio of fuel mass flow rate injected through the pilot stage over the total one. As three flame shapes were found experimentally, Large-Eddy Simulations are performed in this study to assess the impact of the flame shape on the combustion regime and stability of the burner. Two operating conditions were explored experimentally (pilot-only and multipoint-dominated) to validate the simulations and compare the three flames. An additional multipoint-only condition is also investigated for the V flame. The burning regimes (premixed and non-premixed) and noise signatures (as a function of fuel staging) were compared to check whether these flames could benefit from the staging strategy. The M and Tulip flame combustion regimes are little affected by fuel staging, remaining mostly premixed and non-premixed, respectively, regardless of fuel staging. In opposition, the V flame changes from being mostly non-premixed to completely premixed when the injection is changed from pilot-only to multipoint-only. For the same staging evolution, the V flame also emits less noise for the investigated points. These results show that the V flame shape is the only one that allows this burner to benefit from an efficient fuel staging strategy.","PeriodicalId":15685,"journal":{"name":"Journal of Engineering for Gas Turbines and Power-transactions of The Asme","volume":"156 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135855640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of Water-Cooling Effect in Hydrogen-Fed SOFC for High-Efficiency Combined System Design 基于高效组合系统设计的氢馈SOFC水冷效果评价

4区工程技术

Journal of Engineering for Gas Turbines and Power-transactions of The Asme Pub Date : 2023-10-13 DOI: 10.1115/1.4063743

Hye Rim Kim, Tong Seop Kim

{"title":"Evaluation of Water-Cooling Effect in Hydrogen-Fed SOFC for High-Efficiency Combined System Design","authors":"Hye Rim Kim, Tong Seop Kim","doi":"10.1115/1.4063743","DOIUrl":"https://doi.org/10.1115/1.4063743","url":null,"abstract":"Abstract If pure hydrogen is used as a fuel in high-temperature fuel cells, waste heat must be removed by air cooling, which requires increased power consumption for supplying excess air. This study presents a hydrogen-fed solid oxide fuel cell (SOFC) that uses water instead of air for stack cooling and improved system performance. A novel SOFC system with energy cascade utilization is also proposed using cooling water as the working fluid for a steam turbine. Water cooling for the SOFC stack cooling reduced the stack power and efficiency but significantly reduced the power consumption for supplying excess air by more than 60%. Under ambient SOFC operating pressure, the net power and efficiency of the proposed system were increased by 25.6% and 12.2%p compared to the air-cooled system, respectively. At an SOFC operating pressure of 1000 kPa, the proposed hybrid system with energy cascade utilization achieved improvements of 10.2% in net power and 7.5%p in net efficiency, leading to efficiency higher than 73%. This study is significant in that it proposes a novel high-efficiency SOFC system with energy cascade utilization by using two-phase water as a cooling medium and working fluid of steam turbine.","PeriodicalId":15685,"journal":{"name":"Journal of Engineering for Gas Turbines and Power-transactions of The Asme","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135918681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Integrated Control Design for a Partially Turboelectric Aircraft Propulsion System 部分涡轮动力飞机推进系统集成控制设计

4区工程技术

Journal of Engineering for Gas Turbines and Power-transactions of The Asme Pub Date : 2023-10-11 DOI: 10.1115/1.4063715

Donald L Simon, Santino J. Bianco, Marcus Horning

{"title":"Integrated Control Design for a Partially Turboelectric Aircraft Propulsion System","authors":"Donald L Simon, Santino J. Bianco, Marcus Horning","doi":"10.1115/1.4063715","DOIUrl":"https://doi.org/10.1115/1.4063715","url":null,"abstract":"Abstract Electrified Aircraft Propulsion (EAP) holds great potential for reducing aviation emissions and fuel burn. A variety of EAP architectures have been proposed including partially-turboelectric configurations that combine turbofan engines with motor-driven propulsors. Such architectures exhibit coupling between subsystems and thus require an integrated control solution. This paper presents an integrated control design strategy for a commercial single-aisle partially-turboelectric aircraft concept consisting of two wing-mounted turbofan engines and an electric motor driven tailfan propulsor. The turbofans serve the dual purpose of generating thrust and supplying mechanical offtake power used to generate electricity for the tailfan motor. The propulsion control system is tasked with coordinating turbofan and tailfan operation under both steady-state and transient scenarios. The paper introduces a linear state-space representation of the architecture reflecting the coupling between the turbofan and tailfan subsystems along with loop transfer functions reflecting open- and closed-loop system dynamics. Also discussed is an applied strategy for scheduling the tailfan setpoint command based on the average sensed fan speed of the two turbofans. This approach ensures synchronized operation of the turbofan and tailfan subsystems while also allowing the turbofan fuel control design to be simplified. Performance of the integrated control design is assessed through a real-time hardware-in-the-loop test. Results from this facility test are presented to illustrate the efficacy of the applied integrated control design approach under steady-state and transient scenarios.","PeriodicalId":15685,"journal":{"name":"Journal of Engineering for Gas Turbines and Power-transactions of The Asme","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136097371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development and Validation of a Segregated Conjugate Heat Transfer Procedure On a sCO2 Dry Gas Seal Test Bench sCO2干气密封试验台分离共轭传热程序的开发与验证

4区工程技术

Journal of Engineering for Gas Turbines and Power-transactions of The Asme Pub Date : 2023-10-11 DOI: 10.1115/1.4063716

Isacco Rafanelli, Giulio Generini, Antonio Andreini, Tommaso Diurno, Gabriele Girezzi, Andrea Paggini

{"title":"Development and Validation of a Segregated Conjugate Heat Transfer Procedure On a sCO2 Dry Gas Seal Test Bench","authors":"Isacco Rafanelli, Giulio Generini, Antonio Andreini, Tommaso Diurno, Gabriele Girezzi, Andrea Paggini","doi":"10.1115/1.4063716","DOIUrl":"https://doi.org/10.1115/1.4063716","url":null,"abstract":"Abstract Carbon Dioxide at supercritical state shows favorable thermodynamic properties for closed loop Brayton and Rankine cycles. High density, close to a liquid, and low viscosity, close to a gas, drive to achieve higher energy conversion efficiency with smaller size turbines and components. DGSs are gas-lubricated, noncontacting, endface seals, consisting of a mating (rotating) ring and a primary (stationary) ring. Due to high rotational speeds, small size sealing gaps, high fluid pressure and density, the heat generated by friction through the seal has a large impact on the temperature distribution, therefore a thermal design is needed to stay below the seal allowable temperature. Nowadays, numerical Conjugate Heat Transfer (CHT) analysis is a good industrial practice to quantify the thermal distribution in turbomachinery components. On the other hand, due to different order of magnitude of secondary flows cavity sizes and DGS seal gaps, simulating the whole fluid domain with 3D Computational Fluid Dynamic (CFD) calculation could drive to prohibitive computational costs. This paper presents a fast numerical iterative procedure based on a commercial 1D flow network modeler (Altair Flow Simulator) coupled with a commercial finite element solver (Ansys Mechanical). The proposed procedure is applied and validated in a DGS test bench operated by Flowserve. Validation data set has been generated operating the DGS in the test bench at different conditions in terms of angular velocity and housing temperature with sCO2 as working fluid. Results have shown a good agreement with experimental data at each operating condition with extremely low computational times.","PeriodicalId":15685,"journal":{"name":"Journal of Engineering for Gas Turbines and Power-transactions of The Asme","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136098343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fluid Dynamic Loss Model with Wide Applicability for Aeroengine Transmission Gears 适用范围广的航空发动机传动齿轮流体动力学损失模型

4区工程技术

Journal of Engineering for Gas Turbines and Power-transactions of The Asme Pub Date : 2023-10-11 DOI: 10.1115/1.4063714

Hidenori Arisawa, Mitsuaki Tanaka, Hironori Hashimoto, Tatsuhiko Goi, Takahiko Banno, Hirofumi Akahori

{"title":"Fluid Dynamic Loss Model with Wide Applicability for Aeroengine Transmission Gears","authors":"Hidenori Arisawa, Mitsuaki Tanaka, Hironori Hashimoto, Tatsuhiko Goi, Takahiko Banno, Hirofumi Akahori","doi":"10.1115/1.4063714","DOIUrl":"https://doi.org/10.1115/1.4063714","url":null,"abstract":"Abstract In high-speed gear systems for aeroengines, it is important to reduce the fluid dynamic loss, which accounts for the majority of power loss, to improve the fuel efficiency. For reasonable loss-reduction and the standardization of low-power-loss designs, a fluid dynamic loss model with wide applicability is needed. However, there are few reports of loss models considering the gear shroud effect on the oil dynamic loss. This study developed a loss model based on fluid dynamic loss phenomena. Specifically, fluid dynamic loss models were developed for the \"air side-flow loss,\" \"air pumping loss,\" \"oil-jet acceleration loss,\" and \"oil re-acceleration loss\" in the gear meshing part, and \"air vortex loss\" and \"oil churning loss\" in the gear peripheral part, with consideration to the shrouding effect. Moreover, an experimental method and a numerical method for loss classification are proposed. The fluid dynamic loss models were validated by experiments or experimentally validated numerical simulations. To demonstrate the effectiveness of the loss model for low-power-loss design, the influence of the design parameters was investigated, and the typical parameters were optimized.","PeriodicalId":15685,"journal":{"name":"Journal of Engineering for Gas Turbines and Power-transactions of The Asme","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136097989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Methodology to Monitor Early Warnings Before Gas Turbine Trip 燃气轮机跳闸前预警监测方法

4区工程技术

Journal of Engineering for Gas Turbines and Power-transactions of The Asme Pub Date : 2023-10-11 DOI: 10.1115/1.4063720

Enzo Losi, Mauro Venturini, Lucrezia Manservigi, Giovanni Bechini

{"title":"Methodology to Monitor Early Warnings Before Gas Turbine Trip","authors":"Enzo Losi, Mauro Venturini, Lucrezia Manservigi, Giovanni Bechini","doi":"10.1115/1.4063720","DOIUrl":"https://doi.org/10.1115/1.4063720","url":null,"abstract":"Abstract The current energy scenario requires that gas turbines (GTs) operate at their maximum efficiency and highest reliability. Trip is one of the most disrupting events that reduces GT availability and increases maintenance costs. To tackle the challenge of GT trip prediction, this paper presents a methodology that has the goal of monitoring the early warnings raised during GT operation and trigger an alert to avoid trip occurrence. The methodology makes use of an autoencoder (prediction model) and a three-stage criterion (detection procedure). The autoencoder is first trained to reconstruct safe operation data and subsequently tested on new data collected before trip occurrence. The trip detection criterion checks whether the individually tested data points should be classified as normal or anomalous (first stage), provides a warning if the anomaly score over a given time frame exceeds a threshold (second stage), and, finally, combines consecutive warnings to trigger a trip alert in advance (third stage). The methodology is applied to a real-world case study composed of a collection of trips, of which the causes may be different, gathered from various GTs in operation during several years. Historical observations of gas path measurements taken during three days of GT operation before trip occurrence are employed for the analysis. Once optimally tuned, the methodology provides a trip alert with a reliability equal to 75% at least ten hours in advance before trip occurrence.","PeriodicalId":15685,"journal":{"name":"Journal of Engineering for Gas Turbines and Power-transactions of The Asme","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136098342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0