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- 저자 : Tetsuhiro TSUKIJI (검색결과 1 건)
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Experimental and numerical flow analysis in hydraulic vane pump
Junichi SUEMATSU,Tetsuhiro TSUKIJI,Mariko WATANABE,Shinji YAKABE,Hirohito WATANABE,Yoshinari NAKAMURA,Kazunari SUZUKI 유공압건설기계학회 2015 유공압건설기계학회 학술대회논문집 Vol.2015 No.10
The purpose of this study is to conduct a three dimensional flow analysis of a hydraulic vane pump by using computational fluid dynamics (CFD), to evaluate an accuracy of volumetric flow rate in CFD compared to experimental value and to examine a influence of the evaporation coefficient and condensation coefficient in Zwart–Gerber–Belamri cavitation model to pressure in a vane chamber. In this study, standard k-ε turbulent model with the Zwart–Gerber–Belamri cavitation model is used to estimate the cavitating flow in vane pump. In CFD, two notch models are used. From results of experiments and CFD analysis of volumetric flow rate, there is little difference between the experiments and CFD results in the low speed range. However, for high speed range, in a case with no cavitation model, the CFD results of volumetric flow rate are different from the experimental ones. On the other hand, in the case with cavitation model, those agree with the experimental values. In this case, the error of volumetric flow rate is less than 1% in the low speed range and less than 2.5% in the high speed range. From CFD results of pressure fluctuation in a vane chamber when the evaporation coefficient and condensation coefficient in the cavitation model are varied, the surge pressure can be seen in a vane chamber. In conclusion, it could be considered that the CFD calculation with cavitation model is sufficiently accurate in volumetric flow rate. In addition, as the evaporation coefficient becomes large, amplitude of the pressure fluctuation in a vane chamber after a surge pressure becomes large, as the condensation coefficient becomes large, the surge pressure in a vane chamber becomes low.
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