一种适用于热流计算的改进WENO格式  

Improved weighted essential non-oscillatory methods in hypersonic heat-flux simulation

作　　者：王超[1] 吴颂平[1] 

机构地区：[1]北京航空航天大学航空科学与工程学院,北京100191

出　　处：《航空动力学报》2012年第11期2499-2504,共6页Journal of Aerospace Power

基　　金：国家自然科学基金(91016006)

摘　　要：数值格式是影响高超声速热流数值计算准确度的主要因素之一.根据高超声速流场的特性合理的控制了数值黏性,对WENO(weighted essentially non-oscillatory)格式进行了改进,使其适用于高超声速热流计算.研究结果表明:改进后的格式在捕捉激波时具有良好的激波辨率,在壁面附近尽量减小了数值黏性,提高了格式的黏性分辨率.数值试验也表明了这种改进算法的有效性.Numerical scheme is one of the most important factors for hypersonic heat- flux numerical simulation. Weighted essentially non-oscillatory （WENO） scheme was im- proved to meet the above requirementsutilizing hypersonic flow characteristics to control the numerical dissipation. The improved scheme can effectively distinguish shock and other re- gions of large gradients with high resolution, and reduce numerical dissipation to improve numerical high-resolution near the wall. Three numerical experiments indicate that the nu- merical method proposed here is effective.

关 键 词：高超声速 热流 WENO格式 数值格式 数值耗散 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]