Detection and evaluation of cavitation in the stator of a torque converter using pressure measurement. Guo, M, Liu, C, Liu, S., Ke, Z., Wei, W, Yan, Q., & Khoo, B. PHYSICS OF FLUIDS, 34(4):045124, American Institute of Physics, April, 2022. WOS:000793146500003 tex.ids= Guo2022Detection![Detection and evaluation of cavitation in the stator of a torque converter using pressure measurement [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex Cavitation is a transient phase transition between liquid and vapor, and it often occurs in fluid machinery, especially in a hydraulic torque converter that uses oil as the working medium to transmit speed and torque. The complex and strongly coupled fluid flow in the torque converter is prone to cavitation due to high rotating speed and high-temperature working conditions. Cavitation seriously affects the working performance, transmission smoothness, and service life of the torque converter. The flow pressure in the stator of a torque converter under various charging conditions and high rotating speeds was measured. The pressure data on the stator blade were analyzed in the time domain and frequency domain to identify and evaluate the cavitation characteristic. The transient cavitation flow inside the torque converter was also simulated with the computational fluid dynamics model. The results show that the shedding of cavitation seriously reduced the hydraulic performance, hindered the fluid flow, and destroyed the stability of the flow field. Moreover, cavitation aggravates the complexity and nonlinearity of the pressure frequency and hydraulic performance oscillation of the torque converter, and seriously affected the shaft/blade interaction frequency between the pump and stator. Meanwhile, the occurrence and degree of cavitation in the torque converter can be evaluated by A(PS.shaft)/A(PS.blade) (the amplitude ratio of the shaft interaction frequency and blade interaction frequency between pump and stator) with spectrum analysis of the dynamic pressure, and the critical value was 1.6 for the test torque converter. The research revealed the influence of cavitation on the internal flow field of the torque converter and provided a novel practical cavitation evaluation technique.Published under an exclusive license by AIP Publishing.
@article{Guo2022Detection,
title = {Detection and evaluation of cavitation in the stator of a torque converter using pressure measurement},
volume = {34},
copyright = {4.5339},
issn = {1070-6631},
url = {https://aip.scitation.org/doi/10.1063/5.0088055},
doi = {10.1063/5.0088055},
abstract = {Cavitation is a transient phase transition between liquid and vapor, and it often occurs in fluid machinery, especially in a hydraulic torque converter that uses oil as the working medium to transmit speed and torque. The complex and strongly coupled fluid flow in the torque converter is prone to cavitation due to high rotating speed and high-temperature working conditions. Cavitation seriously affects the working performance, transmission smoothness, and service life of the torque converter. The flow pressure in the stator of a torque converter under various charging conditions and high rotating speeds was measured. The pressure data on the stator blade were analyzed in the time domain and frequency domain to identify and evaluate the cavitation characteristic. The transient cavitation flow inside the torque converter was also simulated with the computational fluid dynamics model. The results show that the shedding of cavitation seriously reduced the hydraulic performance, hindered the fluid flow, and destroyed the stability of the flow field. Moreover, cavitation aggravates the complexity and nonlinearity of the pressure frequency and hydraulic performance oscillation of the torque converter, and seriously affected the shaft/blade interaction frequency between the pump and stator. Meanwhile, the occurrence and degree of cavitation in the torque converter can be evaluated by A(PS.shaft)/A(PS.blade) (the amplitude ratio of the shaft interaction frequency and blade interaction frequency between pump and stator) with spectrum analysis of the dynamic pressure, and the critical value was 1.6 for the test torque converter. The research revealed the influence of cavitation on the internal flow field of the torque converter and provided a novel practical cavitation evaluation technique.Published under an exclusive license by AIP Publishing.},
language = {en-US},
number = {4},
urldate = {2023-01-13},
journal = {PHYSICS OF FLUIDS},
publisher = {American Institute of Physics},
author = {Guo, M and Liu, C and Liu, SQ and Ke, ZF and Wei, W and Yan, QD and Khoo, BC},
month = apr,
year = {2022},
note = {WOS:000793146500003
tex.ids= Guo2022Detection},
keywords = {/unread, FLOW, ②已读1x, ③笔记2x},
pages = {045124},
}
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Cavitation seriously affects the working performance, transmission smoothness, and service life of the torque converter. The flow pressure in the stator of a torque converter under various charging conditions and high rotating speeds was measured. The pressure data on the stator blade were analyzed in the time domain and frequency domain to identify and evaluate the cavitation characteristic. The transient cavitation flow inside the torque converter was also simulated with the computational fluid dynamics model. The results show that the shedding of cavitation seriously reduced the hydraulic performance, hindered the fluid flow, and destroyed the stability of the flow field. Moreover, cavitation aggravates the complexity and nonlinearity of the pressure frequency and hydraulic performance oscillation of the torque converter, and seriously affected the shaft/blade interaction frequency between the pump and stator. Meanwhile, the occurrence and degree of cavitation in the torque converter can be evaluated by A(PS.shaft)/A(PS.blade) (the amplitude ratio of the shaft interaction frequency and blade interaction frequency between pump and stator) with spectrum analysis of the dynamic pressure, and the critical value was 1.6 for the test torque converter. The research revealed the influence of cavitation on the internal flow field of the torque converter and provided a novel practical cavitation evaluation technique.Published under an exclusive license by AIP Publishing.","language":"en-US","number":"4","urldate":"2023-01-13","journal":"PHYSICS OF FLUIDS","publisher":"American Institute of Physics","author":[{"propositions":[],"lastnames":["Guo"],"firstnames":["M"],"suffixes":[]},{"propositions":[],"lastnames":["Liu"],"firstnames":["C"],"suffixes":[]},{"propositions":[],"lastnames":["Liu"],"firstnames":["SQ"],"suffixes":[]},{"propositions":[],"lastnames":["Ke"],"firstnames":["ZF"],"suffixes":[]},{"propositions":[],"lastnames":["Wei"],"firstnames":["W"],"suffixes":[]},{"propositions":[],"lastnames":["Yan"],"firstnames":["QD"],"suffixes":[]},{"propositions":[],"lastnames":["Khoo"],"firstnames":["BC"],"suffixes":[]}],"month":"April","year":"2022","note":"WOS:000793146500003 tex.ids= Guo2022Detection","keywords":"/unread, FLOW, ②已读1x, ③笔记2x","pages":"045124","bibtex":"@article{Guo2022Detection,\n\ttitle = {Detection and evaluation of cavitation in the stator of a torque converter using pressure measurement},\n\tvolume = {34},\n\tcopyright = {4.5339},\n\tissn = {1070-6631},\n\turl = {https://aip.scitation.org/doi/10.1063/5.0088055},\n\tdoi = {10.1063/5.0088055},\n\tabstract = {Cavitation is a transient phase transition between liquid and vapor, and it often occurs in fluid machinery, especially in a hydraulic torque converter that uses oil as the working medium to transmit speed and torque. 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Moreover, cavitation aggravates the complexity and nonlinearity of the pressure frequency and hydraulic performance oscillation of the torque converter, and seriously affected the shaft/blade interaction frequency between the pump and stator. Meanwhile, the occurrence and degree of cavitation in the torque converter can be evaluated by A(PS.shaft)/A(PS.blade) (the amplitude ratio of the shaft interaction frequency and blade interaction frequency between pump and stator) with spectrum analysis of the dynamic pressure, and the critical value was 1.6 for the test torque converter. 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