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International Journal of Fluid Machinery and Systems最新文献

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Study on Flow Control and Noise Reduction of Bionic Airfoil Based on Intelligent Optimization Algorithm 基于智能优化算法的仿生翼型流控降噪研究
International Journal of Fluid Machinery and Systems Pub Date : 2023-09-30 DOI: 10.5293/ijfms.2023.16.3.270
Jingjian Cao, Cui Dai, Junfeng Qiu, Liang Dong
{"title":"Study on Flow Control and Noise Reduction of Bionic Airfoil Based on Intelligent Optimization Algorithm","authors":"Jingjian Cao, Cui Dai, Junfeng Qiu, Liang Dong","doi":"10.5293/ijfms.2023.16.3.270","DOIUrl":"https://doi.org/10.5293/ijfms.2023.16.3.270","url":null,"abstract":"The bionic sawtooth structure has a good noise reduction effect on the middle and low frequency flow noise, but the current researches mostly focus on the airfoil noise reduction with limited sawtooth number, ignoring the search for the noise reduction law of the sawtooth structure parameters. In this paper, four structural parameters, including tooth number, height to width ratio, passivation ratio and angle of flow cut, are selected to study the optimization design of bionic sawtooth airfoil by numerical calculation method. A noise reduction method for bionic sawtooth airfoil optimization is proposed, and the sawtooth parameters with the optimal noise reduction effect are found. In this paper, the total sound pressure level is taken as the optimization objective, and the neural network algorithm fitting and adaptive simulated annealing algorithm are employed to optimize, and the rationality of the prediction results is evaluated by the method of manual supervision. The results show that the sawtooth number has the most obvious effect on the airfoil noise reduction effect, and the total sound pressure level after optimization is reduced by 0.55dB compared with that before optimization, and the noise reduction effect is mainly concentrated near the trailing edge of the airfoil.","PeriodicalId":38576,"journal":{"name":"International Journal of Fluid Machinery and Systems","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135084513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Method to Determine the Circumferential Sliding of the Intershaft Gas Film Seal Considering Centrifugal and Thermal Expansion Effects 考虑离心和热膨胀效应的轴间气膜密封周向滑动的确定方法
International Journal of Fluid Machinery and Systems Pub Date : 2023-09-30 DOI: 10.5293/ijfms.2023.16.3.282
Guoqiang Hou, Hua Su, Shuaike Zhao, Ke Li
{"title":"A Method to Determine the Circumferential Sliding of the Intershaft Gas Film Seal Considering Centrifugal and Thermal Expansion Effects","authors":"Guoqiang Hou, Hua Su, Shuaike Zhao, Ke Li","doi":"10.5293/ijfms.2023.16.3.282","DOIUrl":"https://doi.org/10.5293/ijfms.2023.16.3.282","url":null,"abstract":"The paper presents a method for predicting the circumferential relative sliding between the seal ring and the outer rotor in the dual rotor aero engine intershaft seal under high temperature and high speed conditions A criterion is proposed for determining the circumferential sliding of the intershaft end face gas film seal taking into account the effects of centrifugal expansion and thermal expansion. The mechanical mechanism of the circumferential sliding between the seal ring and the outer rotor is investigated. The expansion of the seal ring and the outer rotor is simplified to a plane thermoelastic mechanical problem, and the expansion and deformation of the two parts are calculated. The influence of material characteristics, temperature difference, and initial interference on the expansion deformation and connection relationship of the seal ring and outer rotor is analyzed Moreover, the critical sliding speed region between the seal ring and the outer rotor is determined. The analysis method provides theoretical guidance for predicting the circumferential sliding of the seal ring in practical engineering applications.","PeriodicalId":38576,"journal":{"name":"International Journal of Fluid Machinery and Systems","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135084507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Method for Estimating the Transient Response Time of Turbochargers 涡轮增压器瞬态响应时间的估计方法
International Journal of Fluid Machinery and Systems Pub Date : 2023-09-30 DOI: 10.5293/ijfms.2023.16.3.242
Chenfang Wang, Mengmeng Ou, Xiang Gao, Weilin Zhuge, Yangjun Zhang
{"title":"A Method for Estimating the Transient Response Time of Turbochargers","authors":"Chenfang Wang, Mengmeng Ou, Xiang Gao, Weilin Zhuge, Yangjun Zhang","doi":"10.5293/ijfms.2023.16.3.242","DOIUrl":"https://doi.org/10.5293/ijfms.2023.16.3.242","url":null,"abstract":"The transient response of a turbocharger has an important influence on the performance of engine variable conditions. An accurate estimation of the transient response process time is necessary for variable condition control to improve the engine response characteristics. In this study, the effect of the key factors on the turbocharger response speed, such as the turbine inlet flow rate, temperature and rotor inertia is investigated. In addition, the relationships between the turbocharger response time with respect to the response process of the turbine inlet initial state flow rate, turbine inlet end state flow rate, turbine inlet temperature and rotor inertia show correlations. The predicted response time values obtained using the relationships in comparison to the simulated values within the calculation range of this study are within a 10% error.","PeriodicalId":38576,"journal":{"name":"International Journal of Fluid Machinery and Systems","volume":"219 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135084511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Flow Resistance Characteristics of Pulsating Turbulent Flow Through a 90° Bend 脉动湍流通过90°弯道的流动阻力特性
International Journal of Fluid Machinery and Systems Pub Date : 2023-09-30 DOI: 10.5293/ijfms.2023.16.3.257
Masaru Sumida, Takuroh Senoo
{"title":"Flow Resistance Characteristics of Pulsating Turbulent Flow Through a 90° Bend","authors":"Masaru Sumida, Takuroh Senoo","doi":"10.5293/ijfms.2023.16.3.257","DOIUrl":"https://doi.org/10.5293/ijfms.2023.16.3.257","url":null,"abstract":"The characteristics of flow resistance in a pulsating turbulent flow through a 90° bend with a circular cross-section were investigated. Water was used as the working fluid to investigate a wide range of governing parameters experimentally. The Womersley n umber α varied from 10 to 50, the mean Reynolds number ReSUBta/SUB from 7000 to 22000, the oscillatory Reynolds number ReSUBos/SUB from 6000 to 14000 (the flow rate ratio η was 0.3-0.8), and the curvature radius ratios RSUBc/SUB were 2, 4, and 6. The pressure drop between 2 d (d : inside diameter) upstream and 4d downstream of the bend was measured and analyzed, assuming a quasi-steady flow. The effects of the non-dimensional flow parameters and curvature radius ratio on the flow resistance characteristics were investigated. The approxi mate expressions for the time mean value, amplitude, phase difference from the flow rate variation, and power losses were consistent with the experimental results, and were thus practically useful.","PeriodicalId":38576,"journal":{"name":"International Journal of Fluid Machinery and Systems","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135084512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Investigation of Extruded Endwall on Heat Transfer Characteristics of Channel with Staggering Pin-fins 挤压端壁对交错鳍形通道传热特性的研究
International Journal of Fluid Machinery and Systems Pub Date : 2023-06-30 DOI: 10.5293/ijfms.2023.16.2.169
Van-Hoang Tran, Thanh-Huan Nguyen, Plourde Frédéric, K. D. Do, Duy-Hung Chung, C. Dinh, G. Pham
{"title":"Investigation of Extruded Endwall on Heat Transfer Characteristics of Channel with Staggering Pin-fins","authors":"Van-Hoang Tran, Thanh-Huan Nguyen, Plourde Frédéric, K. D. Do, Duy-Hung Chung, C. Dinh, G. Pham","doi":"10.5293/ijfms.2023.16.2.169","DOIUrl":"https://doi.org/10.5293/ijfms.2023.16.2.169","url":null,"abstract":"","PeriodicalId":38576,"journal":{"name":"International Journal of Fluid Machinery and Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45545991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Characterization of The Rotating Vortex Rope Pressure Oscillations in a Kaplan Model Turbine Draft Tube 轴流转桨模型水轮机尾水管中旋转涡绳压力振荡特性
International Journal of Fluid Machinery and Systems Pub Date : 2023-06-30 DOI: 10.5293/ijfms.2023.16.2.204
S. Shiraghaee, Sundström Joel, R. Mehrdad, M. Cervantes
{"title":"Characterization of The Rotating Vortex Rope Pressure Oscillations in a Kaplan Model Turbine Draft Tube","authors":"S. Shiraghaee, Sundström Joel, R. Mehrdad, M. Cervantes","doi":"10.5293/ijfms.2023.16.2.204","DOIUrl":"https://doi.org/10.5293/ijfms.2023.16.2.204","url":null,"abstract":"","PeriodicalId":38576,"journal":{"name":"International Journal of Fluid Machinery and Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47713540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Research on Rapid Detection Method of Pipeline Leakage Based on The Transient Flow Method 基于瞬态流法的管道泄漏快速检测方法研究
International Journal of Fluid Machinery and Systems Pub Date : 2023-06-30 DOI: 10.5293/ijfms.2023.16.2.192
You Fu, Biao Chen
{"title":"Research on Rapid Detection Method of Pipeline Leakage Based on The Transient Flow Method","authors":"You Fu, Biao Chen","doi":"10.5293/ijfms.2023.16.2.192","DOIUrl":"https://doi.org/10.5293/ijfms.2023.16.2.192","url":null,"abstract":"","PeriodicalId":38576,"journal":{"name":"International Journal of Fluid Machinery and Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46006669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cooling Water Jacket Design and Fluid-Solid Coupling Heat Transfer Analysis of Oil-Gas Mixed Transmission Twin-Screw Pump Under High Gas Volume Fraction 高含气量油气混输双螺杆泵冷却水套设计及流固耦合传热分析
International Journal of Fluid Machinery and Systems Pub Date : 2023-06-30 DOI: 10.5293/ijfms.2023.16.2.157
Wang Li, Xuejing Zhang, Junhu Yang, Chong Ma, W. Han, Yu-bing Gong
{"title":"Cooling Water Jacket Design and Fluid-Solid Coupling Heat Transfer Analysis of Oil-Gas Mixed Transmission Twin-Screw Pump Under High Gas Volume Fraction","authors":"Wang Li, Xuejing Zhang, Junhu Yang, Chong Ma, W. Han, Yu-bing Gong","doi":"10.5293/ijfms.2023.16.2.157","DOIUrl":"https://doi.org/10.5293/ijfms.2023.16.2.157","url":null,"abstract":"","PeriodicalId":38576,"journal":{"name":"International Journal of Fluid Machinery and Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45615670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Field Test of Contra-Rotating Small Hydroturbine 对转小型水轮机现场试验
International Journal of Fluid Machinery and Systems Pub Date : 2023-06-30 DOI: 10.5293/ijfms.2023.16.2.219
T. Shigemitsu, Takumi Omori, Hiraishi Yuya, T. Tsuda, T. Kawanami, Kenji Hiranuma, Takuji Hosotani, Ding Nan
{"title":"Field Test of Contra-Rotating Small Hydroturbine","authors":"T. Shigemitsu, Takumi Omori, Hiraishi Yuya, T. Tsuda, T. Kawanami, Kenji Hiranuma, Takuji Hosotani, Ding Nan","doi":"10.5293/ijfms.2023.16.2.219","DOIUrl":"https://doi.org/10.5293/ijfms.2023.16.2.219","url":null,"abstract":"","PeriodicalId":38576,"journal":{"name":"International Journal of Fluid Machinery and Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44303154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fan Type Inducer for a Centrifugal Pump by Wire Arc Additive Manufacturing and Machining 离心泵风扇型诱导轮的线弧增材制造与加工
International Journal of Fluid Machinery and Systems Pub Date : 2023-06-30 DOI: 10.5293/ijfms.2023.16.2.184
Shinichiro Ejiri
{"title":"Fan Type Inducer for a Centrifugal Pump by Wire Arc Additive Manufacturing and Machining","authors":"Shinichiro Ejiri","doi":"10.5293/ijfms.2023.16.2.184","DOIUrl":"https://doi.org/10.5293/ijfms.2023.16.2.184","url":null,"abstract":"","PeriodicalId":38576,"journal":{"name":"International Journal of Fluid Machinery and Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46947651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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