NUMERICAL SIMULATION OF CAVITATING FLOWS CONSIDERING THE FLUID COMPRESSIBILITY IN OPENFOAM
The objective of this paper is to address the simulation of transient cavitating flows with the compressibility of both water and vapour considered.The compressible phase volume fraction transport equations and compressible Pressure Possion equation with phase change are derived and a phase change algorithm is implemented into the native compressible two-phase flow solver compressibleInterFoam in OpenFOAM-4.0.The compressible governing equations together with the Tait equation of state for water and ideal gas equations of state for vapour are solved.The partial cavitating flow characterized by alternate effects of re-entrant flow and shock wave around a NACA66 hydrofoil is selected for the solver performance test.Comparisons are made between the results obtained by the native incompressible cavitation solver interPhaseChangeFoam and the present compressible cavitation solver.Results show that both the incompressiblt cavitation solver and compressible solver can predict the attached cavity growth,re-entrant flow development and large scale cloud cavity formation and shedding process,while the cloud cavity collapse induced shock wave phenomena which is highly related with the water/vapour compressibility is only captured by the implemented compressible cavitation solver.Moreover,the compressible cavitation solver can better predict cavitation evolution cycle and cavitation induced pressure fluctuations.The water compressibility is important for the wave dynamics in cavitating flows.
Compressible cavitating flow Tait equation of state Shock wave emission OpenFOAM
CHANGCHANG WANG GUOYU WANG BIAO HUANG
School of Mechanical Engineering,Beijing Institute of Technology,Beijing,100081,China
国际会议
The 13th OpenFOAM Workshop(第13届OpenFOAM国际研讨会)
上海
英文
316-319
2018-06-24（万方平台首次上网日期，不代表论文的发表时间）