摘要
基于平均N-S方程,采用微分雷诺应力湍流模型,非结构混合网格技术,对十字翼导弹绕流流场进行数值模拟。微分雷诺应力模型需要求解雷诺应力张量的每个分量的偏微分方程组,采用压力-应变速率和三阶速度相关项使方程封闭。理论上,微分雷诺应力模型更能反映物理实际。本文研究了十字翼导弹非结构网格的网格收敛性,重点分析了中等大攻角的导弹的压力分布和绕流流场,并将DRSM湍流模型的预测结果与实验数据及SST湍流模型结果进行了对比,数值计算结果和实验数据吻合良好,验证了该种湍流模型对导弹湍流流场的预测能力。
Based on the average N-S equation,adopting differential Reynolds stress turbulence models（DRSM） and unstructured mesh converted from structured mesh technology,numerical simulation is preformed on the turbulent flow about the cruciform missile.The every individual Reynolds stress component is solved,then the pressure-velocity ratio and the correlation of velocity are adopted to make N-S equation integrity.In theory,DRSM can simulate the more complicated flow.The grid convergence,the pressure distribution and the streamtraces of flow section are studied,then the DRSM computational results are compared with the experimental data and the result obtained with SST turbulence model.It is proved that the DRSM turbulence model can simulate the flow field around missile well.
出处
《航空兵器》
2011年第2期3-6,11,共5页
Aero Weaponry
基金
国家科技部973项目(2009CB723800)
关键词
十字翼导弹
微分雷诺应力模型
湍流模型
cruciform missile
differential Reynolds stress model
turbulent model
