The Incompletely Liquid-Filled Two-Phase Numerical Simulation and Experimental Research of the of Fluid Couplings

摘要

CFD simulation method and PIV technique provide efficient methods to reveal the highly complicated internal flow situation of fluid couplings. Although there are quite a number of papers adopting these two methods to analyze the internal flow situation of fluid coupling, most of which only consider single-phase flow. However, in the practical works, the inner fluid field of fluid coupling always refers to two-phase flow both for liqud and gas. In order to indicate the complicated mechanism of coupling internal gas-liquid two-phase flow state more authentically, this thesis simulates the flow field of the two typic fluid couplings work conditions by computational fluid dynamics (CFD) software and adopts the two-dimensional PIV technique of modern testing technology to measure and analyze it. Through the combination of experimental and numerical simulation, it probes into the characteristics of flow field when fluid couplings is under different liquid-filled rate.