固体火箭技术2015，Vol.38Issue(5)：640-645,652,7.DOI:10.7673/j.issn.1006-2793.2015.05.007
双向涡数值模拟雷诺应力各向异性研究与分析
Research and analysis of reynolds stress anisotropic in bidirectional vortex simulation
摘要
Abstract
In this paper,simulation results were compared with experimental data and theoretical results.The simulation validity of RNG k-ε model and SST model based on Boussinesq isotropic hypothesis and RSM model in bidirectional vortex were discussed and bidirectional vortex properties in different inlet velocities were analyzed as well. It is pointed out that the RNG model and SST model could not achieve the bidirectional vortex which frees in outer area and is forced in inner space under any inlet velocity based on Boussinesq isotropic hypothesis,while the RSM model simulation results fit the experiment data and theoretical solutions well.In mantle surface of inner vortex and outer vortex,Reynolds stress anisotropy characteristics is significant and is strengthened with the increase of inlet velocity.The biggest difference between normal stresses in x,y,z direction can reach up to 198%.In core flow area close to axial,Reynolds stress anisotropy is relatively weak,but the greatest difference can still reach as large as 46%.Therefore,it is believed that turbulent models based on Boussinesq isotropic hypothesis are invalid in VCCWC simulation.关键词
双向涡流/涡流冷壁发动机/雷诺应力/各向异性Key words
bidirectional vortex/vortex combustion cold-wall chamber/reynolds stress/anisotropic分类
航空航天引用本文复制引用
党进锋,郜冶,刘加宁..双向涡数值模拟雷诺应力各向异性研究与分析[J].固体火箭技术,2015,38(5):640-645,652,7.基金项目
自然科学基金面上项目( 11372079). （ 11372079）
