摘要
建立了一套基于动量源方法的直升机旋翼/机身流场数值模拟方法。将旋翼对流场的作用以动量源项的形式代表,建立了一个包含动量源项的CFD方法。针对直升机旋翼/机身流场的特点以及动量源方法对网格系统的要求,采用了一种混合网格生成方法。通过结合旋翼桨叶的运动方式、几何特征及气动特性,建立一个包含动量源项的N-S方程的旋翼流场计算方法和迭代流程,并采用该方法进行直升机旋翼、机身和旋翼/机身下洗流场的数值模拟,得到了关于旋翼/机身干扰流场的一些有意义的结论。
Base upon a momentum-source method,a numerical simulation method has been developed to calculate the helicopter rotor/fuselage flowfield.The momentum-source term is used to describe the effect of rotor on its flowfield.According to the characteristics of rotor/fuselage flowfield and requirements of momentum-source method,a hybrid mesh generation approach is developed.In the present method,on the basis of the known movement,geometric and aerodynamic characteristics on blade section,a scheme containing momentum-source term is adopted for the solution of N-S equations.By the present method,the downwash flowfield of rotor and rotor/fuselage is simulated,and some meaningful conclusions are obtained.
出处
《直升机技术》
2008年第3期25-30,共6页
Helicopter Technique
