一种适用于热流计算的改进WENO格式

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. 

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

Numerical scheme is one of the most important factors for hypersonic heat-flux numerical simulation.Weighted essentially non-oscillatory (WENO) scheme was improved to meet the above requirementsutilizing hypersonic flow characteristics to control the numerical dissipation.The improved scheme can effectively distinguish shock and other regions of large gradients with high resolution,and reduce numerical dissipation to improve numerical high-resolution near the wall.Three numerical experiments indicate that the numerical method proposed here is effective.