摘要
基于传统的Van Leer格式提出了一种改进的Van Leer(NVL)格式,解决了Van Leer格式在低马赫数下数值耗散过大,不能求解有粘流场等问题,同时保持Van Leer格式的计算效率。通过二维平板流动算例比较了NVL格式与传统Van Leer格式的数值耗散程度,并以NACA0012翼型的亚声速和跨声速流场以及M6机翼的跨声速流场求解为算例,与Roe格式和传统Van Leer格式进行比较,进一步验证了NVL格式的低耗散性和高效性。
Traditional Van Leer scheme cant be used to resolve viscous flow problems at low Mach number because of its high numerical dissipation. A new upwind discretization scheme new Van Leer (NVL) is proposed to solve this problem. The umerical discretizations of NVL Scheme and traditional VanLeer Scheme are compared by taking the calculation example of Blasiu' s flow. And by taking three numerical experiments including subsonic and transonic flows over NACA0012 airfoil and transonic flows over M6 wing, Roe and traditional Van Leer scheme are compared to illustrate the performance of this new approach. The results indicate that NVL scheme is characterized with low discreization and high efficiency.
出处
《现代防御技术》
北大核心
2011年第5期175-180,共6页
Modern Defence Technology
关键词
改进的Van
Leer格式
速度型
数值耗散
速度传感因子
平板边界层
激波-附面层干扰
new Van Leer (NVL) scheme
velocity profile
numerical dissipation
velocity sensorfunction
fiat plate boundary layer
shock wave/boundary layer interaction