CFD Analysis of the Turbulence Model Adopted in Distribution Process in Axial Piston Pump

doi:10.3901/JME.2018.18.204

Abstract

Abstract: Flow pulsation is one of the important indicators to measure the performance of the plunger pump. Because the test system is more complex, accurate analysis of the pulsation of the plunger pump by theoretical means has become a hot topic for experts. In view of the complex flow state of the internal field of axial piston pump, there is no universal turbulence model adopted in the numerical simulation of the flow. Therefore, a mechanism model of a single piston-valve plate is established. Standard k-ε model, Realizable k-ε model, RNG k-ε model, standard k-ω model, S-A model and laminar model are used in the numerical simulation of the flow field and compared with the result of the PIV analysis. After evaluating the vortex shape, velocity, angle of incidence, pressure drop and flow, the optimal turbulence model adopted in the numerical simulation of the single piston-valve plate model is determined. The simulation accuracy can be further improved by modifying the coefficient of the standard k-ε model. The calculated model provides a theoretical basis for the flow analysis of plunger pump.

Key words: axial piston pump, flow field analysis, PIV test, turbulence model

CLC Number:

TH137

ZHANG Jin, GONG Xuezhi, HU Jianjun, QUAN Lingxiao, HA Liang, KONG Xiangdong. CFD Analysis of the Turbulence Model Adopted in Distribution Process in Axial Piston Pump[J]. Journal of Mechanical Engineering, 2018, 54(18): 204-211.

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