Propulsion and Power Research最新文献_第6页

Numerical study of vortex breaker optimization in a first stage oxygen tank of a cryogenic liquid launch vehicle 低温液体运载火箭一级氧气舱破涡器优化的数值研究

IF 5.3 2区工程技术

Propulsion and Power Research Pub Date : 2023-09-01 DOI: 10.1016/j.jppr.2023.08.002

Yixiu Shen, Yimeng Li, Zhenggang Du

引用次数: 0

Artificial neural network model of non-Darcy MHD Sutterby hybrid nanofluid flow over a curved permeable surface: Solar energy applications 非达西MHD萨特比混合纳米流体在弯曲可渗透表面上流动的人工神经网络模型:太阳能应用

IF 5.3 2区工程技术

Propulsion and Power Research Pub Date : 2023-09-01 DOI: 10.1016/j.jppr.2023.07.002

Shaik Jakeer , Maduru Lakshmi Rupa , Seethi Reddy Reddisekhar Reddy , A.M. Rashad

{"title":"Artificial neural network model of non-Darcy MHD Sutterby hybrid nanofluid flow over a curved permeable surface: Solar energy applications","authors":"Shaik Jakeer , Maduru Lakshmi Rupa , Seethi Reddy Reddisekhar Reddy , A.M. Rashad","doi":"10.1016/j.jppr.2023.07.002","DOIUrl":"https://doi.org/10.1016/j.jppr.2023.07.002","url":null,"abstract":"<div><p>The conversion of solar radiation to thermal energy has recently much interest as the requirement for renewable heat and power grows. Due to their enhanced ability to promote heat transmission, nanofluids can significantly improve solar-thermal systems' efficiency. This section aims to study the heat transfer behavior of the Sutterby hybrid nanofluid flow of magnetohydrodynamics in the presence of a non-uniform heat source/sink and linear thermal radiation over a non-Darcy curved permeable surface. A novel implementation of an intelligent numerical computing solver based on multi-layer perceptron (MLP) feed-forward back-propagation artificial neural network (ANN) with the Levenberg-Marquard algorithm is provided in the current study. Data were gathered for the ANN model's testing, certification, and training. Established mathematical equations are nonlinear, which are resolved for velocity, the temperature in addition to the skin friction coefficient, and the rate of heat transfer by using the bvp4c with MATLAB solver. The ANN model selects data, constructs and trains a network, then evaluates its efficacy via mean square error. Graphs illustrate the impact of a wide range of physical factors on variables, including pressure, velocity, and temperature. In the entire study, the thermal energy improved by the SiO<sub>2</sub> (silicon dioxide) - Au (gold) hybrid nanofluid than the SiO<sub>2</sub>-TiO<sub>2</sub> (titanium dioxide) hybrid nanofluid. The higher internal heat generation/absorption parameter values increase the temperature.</p></div>","PeriodicalId":51341,"journal":{"name":"Propulsion and Power Research","volume":"12 3","pages":"Pages 410-427"},"PeriodicalIF":5.3,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49701140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 computation of Brownian motion and thermophoresis effects on rotational micropolar nanomaterials with activation energy 具有活化能的旋转微极性纳米材料的布朗运动和热泳效应的数值计算

IF 5.3 2区工程技术

Propulsion and Power Research Pub Date : 2023-09-01 DOI: 10.1016/j.jppr.2023.05.005

Hassan Waqas , Shan Ali Khan , Bagh Ali , Dong Liu , Taseer Muhammad , Enran Hou

{"title":"Numerical computation of Brownian motion and thermophoresis effects on rotational micropolar nanomaterials with activation energy","authors":"Hassan Waqas , Shan Ali Khan , Bagh Ali , Dong Liu , Taseer Muhammad , Enran Hou","doi":"10.1016/j.jppr.2023.05.005","DOIUrl":"10.1016/j.jppr.2023.05.005","url":null,"abstract":"<div><p>The current article investigates the numerical study of the micropolar nanofluid flow through a 3D rotating surface. This communication may manipulate for the aim such as the delivery of the drug, cooling of electronic chips, nanoscience and the fields of nanotechnology. The impact of heat source/sink is employed. Brownian motion and thermophoresis aspects are discussed. The rotating sheet with the impacts of Darcy-Forchheimer law is also scrutinized. Furthermore, the influence of activation energy is analyzed in the current article. The numerical analysis is simplified with the help of befitted resemblance transformations. The succor of the shooting algorithm with built-in solver bvp4c MATLAB software is used for the numerical solution of nonlinear transformed equations. The consequences of different physical factors on the physical engineering quantities and the subjective fields were examined and presented. According to outcomes, it can be analyzed that the flow profile declined with the rotational parameter. It is observed that angular velocity diminishes via a larger porosity parameter. Furthermore, the temperature gradient is declined via a larger magnitude of the Prandtl number. The heat transfer is enhanced in the occurrence of Brownian motion. The activations energy parameter causes an increment in the volumetric concentration field. Moreover, the local Nusselt number is reduced via a greater estimation of the porosity parameter.</p></div>","PeriodicalId":51341,"journal":{"name":"Propulsion and Power Research","volume":"12 3","pages":"Pages 397-409"},"PeriodicalIF":5.3,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44608626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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: 4

First and second laws analysis of viscoelastic fluid with temperature dependent properties for Couette-Poiseuille flow 温度相关粘弹性流体的第一和第二定律分析

IF 5.3 2区工程技术

Propulsion and Power Research Pub Date : 2023-09-01 DOI: 10.1016/j.jppr.2023.04.002

Mehdi Moayed Mohseni, Farshid Pajoum Shariati

{"title":"First and second laws analysis of viscoelastic fluid with temperature dependent properties for Couette-Poiseuille flow","authors":"Mehdi Moayed Mohseni, Farshid Pajoum Shariati","doi":"10.1016/j.jppr.2023.04.002","DOIUrl":"https://doi.org/10.1016/j.jppr.2023.04.002","url":null,"abstract":"<div><p>The entropy analysis of viscoelastic fluid obeying the simplified Phan-Thien-Tanner (SPTT) model with variable thermophysical properties are obtained for laminar, steady state and fully developed Couette-Poiseuille flow. The homotopy perturbation method (HPM) allows us to solve nonlinear momentum and energy differential equations. The Reynold's model is used to describe the temperature dependency of thermophysical properties. Results indicate that the increase of the group parameter (<span><math><mrow><mrow><mi>B</mi><mi>r</mi></mrow><mo>/</mo><mi>Ω</mi></mrow></math></span>) and the Brinkman number (<em>Br</em>) which show the power of viscous dissipation effect; increases the entropy generation while increasing fluid elasticity (<span><math><mrow><mi>ε</mi><msup><mrow><mi>D</mi><mi>e</mi></mrow><mn>2</mn></msup></mrow></math></span>) decreases the generated entropy. Increasing the Reynolds variational parameter (<span><math><mrow><mi>α</mi></mrow></math></span>) which control the level of temperature dependence of physical properties attenuate entropy generation when moving plate and applied pressure gradient have the opposite direction and decreases entropy generation when moving plate and applied pressure gradient have the same direction or both plates are at rest. Also, increasing elasticity reduces the difference between variable and constant thermophysical properties cases. These results may give guidelines for cost optimization in industrial processes.</p></div>","PeriodicalId":51341,"journal":{"name":"Propulsion and Power Research","volume":"12 3","pages":"Pages 380-396"},"PeriodicalIF":5.3,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49702476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Darcy-Forchheimer mangetized flow based on differential type nanoliquid capturing Ohmic dissipation effects 基于差分型纳米液体捕获欧姆耗散效应的Darcy-Forchheimer管理流动

IF 5.3 2区工程技术

Propulsion and Power Research Pub Date : 2023-09-01 DOI: 10.1016/j.jppr.2023.08.003

M. Waqas , Yunjie Xu , M. Nasir , Md Mottahir Alam , Amjad Ali Pasha , Kashif Irshad , Bandar M. Fadhl , M.S. Kausar

{"title":"Darcy-Forchheimer mangetized flow based on differential type nanoliquid capturing Ohmic dissipation effects","authors":"M. Waqas , Yunjie Xu , M. Nasir , Md Mottahir Alam , Amjad Ali Pasha , Kashif Irshad , Bandar M. Fadhl , M.S. Kausar","doi":"10.1016/j.jppr.2023.08.003","DOIUrl":"https://doi.org/10.1016/j.jppr.2023.08.003","url":null,"abstract":"<div><p>Hydromagnetic nanoliquid establish an extraordinary category of nanoliquids that unveil both liquid and magnetic attributes. The interest in the utilization of hydromagnetic nanoliquids as a heat transporting medium stem from a likelihood of regulating its flow along with heat transportation process subjected to an externally imposed magnetic field. This analysis reports the hydromagnetic nanoliquid impact on differential type (second-grade) liquid from a convectively heated extending surface. The well-known Darcy-Forchheimer aspect capturing porosity characteristics is introduced for nonlinear analysis. Robin conditions elaborating heat-mass transportation effect are considered. In addition, Ohmic dissipation and suction/injection aspects are also a part of this research. Mathematical analysis is done by implementing the basic relations of fluid mechanics. The modeled physical problem is simplified through order analysis. The resulting systems (partial differential expressions) are rendered to the ordinary ones by utilizing the apposite variables. Convergent solutions are constructed employing homotopy algorithm. Pictorial and numeric result are addressed comprehensively to elaborate the nature of sundry parameters against physical quantities. The velocity profile is suppressed with increasing Hartmann number (magnetic parameter) whereas it is enhanced with increment in material parameter (second-grade). With the elevation in thermophoresis parameter, temperature and concentration of nanoparticles are accelerated.</p></div>","PeriodicalId":51341,"journal":{"name":"Propulsion and Power Research","volume":"12 3","pages":"Pages 443-455"},"PeriodicalIF":5.3,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49700937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Effects of plasma actuation and hole configuration on film cooling performance 等离子体驱动和孔结构对薄膜冷却性能的影响

IF 5.3 2区工程技术

Propulsion and Power Research Pub Date : 2023-06-01 DOI: 10.1016/j.jppr.2022.03.005

Jie Sun , Fuxing Zhang , Jin Wang , Gongnan Xie , Bengt Sundén

{"title":"Effects of plasma actuation and hole configuration on film cooling performance","authors":"Jie Sun , Fuxing Zhang , Jin Wang , Gongnan Xie , Bengt Sundén","doi":"10.1016/j.jppr.2022.03.005","DOIUrl":"10.1016/j.jppr.2022.03.005","url":null,"abstract":"<div><p>In this paper, plasma actuators are arranged asymmetrically downstream the wall to improve film cooling performance. Effects of blowing ratio, hole configuration and applied voltage on flow characteristics and film cooling effectiveness were investigated numerically on a flat plate. Results show that highest film cooling effectiveness distribution is obtained both in the spanwise and streamwise directions under blowing ratio of 0.5. Average wall film cooling effectiveness of cylindrical hole increases by 251.9% under blowing ratio of 0.5 compared to that under blowing ratio of 1.5. The scale of the counter rotating vortex pairs (CRVP) from fan shaped hole and sister hole are significantly reduced compared to that from cylindrical hole. The console hole has an anti-counter rotating vortex pair (Anti-CRVP), which weakens the entrainment of the CRVP to the coolant air near the wall. Compared with the cylindrical hole, average wall film cooling effectivenesses for fan shaped hole, sister hole and console hole increase by 73.1%, 97.5% and 119.9%. The adherent performance of the coolant air is enhanced after applying plasma actuator. The aerodynamic actuation of the plasma results in the rebound of the fluid close to the wall at 24 kV applied voltage. Average wall film cooling effectiveness of the console hole at 12 kV applied voltage is 10.6% higher than that without plasma.</p></div>","PeriodicalId":51341,"journal":{"name":"Propulsion and Power Research","volume":"12 2","pages":"Pages 227-237"},"PeriodicalIF":5.3,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49003109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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: 1

Design of hypersonic wavecatcher intake at Mach 12 with rectangular-to-elliptical shape transition 马赫数为12的矩形转椭圆型高超声速吸波器进气道设计

IF 5.3 2区工程技术

Propulsion and Power Research Pub Date : 2023-06-01 DOI: 10.1016/j.jppr.2023.04.001

Feng-Yuan Zuo , Sannu Mölder

{"title":"Design of hypersonic wavecatcher intake at Mach 12 with rectangular-to-elliptical shape transition","authors":"Feng-Yuan Zuo , Sannu Mölder","doi":"10.1016/j.jppr.2023.04.001","DOIUrl":"10.1016/j.jppr.2023.04.001","url":null,"abstract":"<div><p>Wavecatcher (inward-turning) intake flows, at design Mach 12, are investigated numerically, to display the effect of wall temperature on flow structures and intake performance. Hypersonic experiments on shock wave/boundary layer interaction are used to validate the Spalart-Allmaras turbulence model for reproducing the features of hypersonic flow. Simulations of hypersonic intake flow are performed at different wall temperatures, including isothermal <em>T</em><sub><em>w</em></sub> = 300 K, <em>T</em><sub><em>w</em></sub> = 1000 K, <em>T</em><sub><em>w</em></sub> = 2000 K, and the adiabatic case. The shock structures, impinging shock positions, surface streamlines, and the development of internal streamwise vortices are discussed. The mass-averaged performance of intake flow shows that, when the wall temperature changes from <em>T</em><sub><em>w</em></sub> = 300 K to adiabatic, the mass capture coefficient decreases from 0.991 to 0.933, the total pressure recovery decreases from 0.200 to 0.083, while exit section Mach number decreases from 4.478 to 3.514. The results suggest that the osculating design method of wavecatcher intake design can successfully be extended to Mach 12, while capturing all airflow at isothermal wall conditions.</p></div>","PeriodicalId":51341,"journal":{"name":"Propulsion and Power Research","volume":"12 2","pages":"Pages 167-179"},"PeriodicalIF":5.3,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47496955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 a double interlocking padded finger seal performance based on thermo-fluid-structure coupling method 基于热流固耦合法的双联锁垫指密封性能数值分析

IF 5.3 2区工程技术

Propulsion and Power Research Pub Date : 2023-06-01 DOI: 10.1016/j.jppr.2023.05.001

Hua Su, Yuhui Huang, Chao Wu

{"title":"Numerical analysis of a double interlocking padded finger seal performance based on thermo-fluid-structure coupling method","authors":"Hua Su, Yuhui Huang, Chao Wu","doi":"10.1016/j.jppr.2023.05.001","DOIUrl":"10.1016/j.jppr.2023.05.001","url":null,"abstract":"<div><p>Non-contacting finger seals represent an advanced non-contacting and compliant seal in gas turbine sealing technology. This paper proposes a new structure of non-contacting finger seals with double interlocking pads. The numerical analysis model based on the thermo-fluid-structure coupling method for the new type finger seal was established. The influence of working conditions on leakage of the seal was studied and compared with the single padded non-contacting finger seal. The results show that the interface between the bottom of the finger pad and rotor surface is the main leakage path that forms the gas film with obvious variations of pressure and flow velocity. Under high temperature and high pressure operating conditions, the hydrodynamic effect of the gas film is enhanced, and lifting force is significantly improved. The deformation of fingers is composed of elastic deformation and thermal deformation. At room temperature, the deformation of fingers is mainly elastic deformation and points to the center of the rotor, which reduces the gas film clearance. The deformation of fingers at high temperature and high pressure creates a circumferentially convergent gap between the bottom of the pad and the rotor, which is beneficial to improve the loading capacity and to reduce leakage of the seal. Compared with the typical single padded non-contacting finger seal, the double interlocking padded finger seal proposed in this paper reduces the leakage factor by about 37%, which provides an advanced seal concept with the potential to improve sealing performance under high temperature and high pressure working conditions.</p></div>","PeriodicalId":51341,"journal":{"name":"Propulsion and Power Research","volume":"12 2","pages":"Pages 238-252"},"PeriodicalIF":5.3,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46654697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Explanation of the mechanisms of unsteady gas flow through the turbocharger seal system, including thermal and structural interactions 解释非定常气体流经涡轮增压器密封系统的机理，包括热和结构的相互作用

IF 5.3 2区工程技术

Propulsion and Power Research Pub Date : 2023-06-01 DOI: 10.1016/j.jppr.2023.05.003

P. Novotný, P. Kudláček, J. Vacula

{"title":"Explanation of the mechanisms of unsteady gas flow through the turbocharger seal system, including thermal and structural interactions","authors":"P. Novotný, P. Kudláček, J. Vacula","doi":"10.1016/j.jppr.2023.05.003","DOIUrl":"10.1016/j.jppr.2023.05.003","url":null,"abstract":"<div><p>Gas flow in the seal system can be expected during the operation of a turbocharger and is associated with negative effects on the quality of the lubricant or turbocharger efficiency. Gas flow also affects particulate matter production due to lubricant entrainment in the compressor or turbine. The prediction of gas flow rates depends on many design parameters and the operating conditions of the turbocharger, but sufficiently accurate descriptions of the gas flow mechanisms and their quantification depending on the operating conditions have not yet been presented. The proposed computational approach simultaneously solves the gas dynamics in the seal system, the heat transfer in the turbocharger rotor-bearing system and the dynamics of the seal rings and rotor, including the bearings. The computational model for the turbocharger of a heavy-duty vehicle engine is experimentally validated. Two mechanisms have major influences on gas mass flow: the gas flow through the thin gap between the moving ring and groove and the flow through the ring gap. The results show that the importance of these mechanisms depends on several geometrical dimensions of the seal system and the operating conditions of the turbocharger, with a strong connection to the rotor dynamics and thermal load of the impellers. Influences involving rotor movement or rotor thermal conditions are crucial, and their non-inclusion limits the ability to correctly predict gas mass flow.</p></div>","PeriodicalId":51341,"journal":{"name":"Propulsion and Power Research","volume":"12 2","pages":"Pages 180-198"},"PeriodicalIF":5.3,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47438482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Bioconvective nanofluid flow over an exponential stretched sheet with thermophoretic particle deposition 具有热泳粒子沉积的指数拉伸片上的生物转化纳米流体流动

IF 5.3 2区工程技术

Propulsion and Power Research Pub Date : 2023-06-01 DOI: 10.1016/j.jppr.2023.05.004

B.C. Prasannakumara , J.K. Madhukesh , G.K. Ramesh

引用次数: 4