化工学报2016，Vol.67Issue(z2)：70-77,8.DOI:10.11949/j.issn.0438-1157.20161371
三维液氮空化的大涡模拟和机理
Numerical simulation and analysis of three-dimension cavitation in liquid nitrogen
摘要
Abstract
This paper mainly simulates liquid nitrogen cavitating flow over a three-dimensional twisted hydrofoil (Twist-1 1N)based on large eddy simulation (LES)turbulence model.The period of shedding cavitation is observed according to pressure fluctuation characteristics at specific monitoring points.Compared with cavitation of water,cryogenics cavitation shows distinctness.Are-entrant jet and a pair of side-entrant jets are observed during cavitating evolution,which is unrevealed in two-dimensional cavitation.The vortex analysis of the interaction between shedding cavitation and the flowing field is performed.It is indicated that the occurrence of cavitation first leads to the unsteady of flow and thus vortexes occur,which further causes the boundary layer separation and cavity shedding.关键词
计算流体力学/数值模拟/气液两相流/空化Key words
CFD/numerical simulation/gas-liquid flow/cavitation分类
通用工业技术引用本文复制引用
徐璐,朱佳凯,谢黄骏,周芮,张小斌..三维液氮空化的大涡模拟和机理[J].化工学报,2016,67(z2):70-77,8.基金项目
国家自然科学基金项目(51276157) （51276157）
浙江省杰出青年基金项目(R15E060001)。 （R15E060001）
