Firstly , a representative wind and wave model , which could both simulate the main characteristics of wig over sea waves and be suitable for numerical calculation , is presented . the model completely considers the fully nonlinear effect of wave surface on the wavy air flow , separates the disturbance of wave surface from the wing - air wave interaction flow , and overcomes the numerical calculation difficulties due to the large difference of dimensions between wing and water waves 首先针对机翼在风浪中的非定常非线性气动力问题,提出了一个既能够反映风浪场主要特征又适合于数值计算的风浪场模型,该模型完整地考虑了波浪表面对气流场的全非线性影响,使波面对流场的扰动分离出来,消除了机翼和波浪几何尺度上的巨大差异带来的数值计算上的困难。
The company produces the table history to be glorious , and develops the innovation unceasingly , develops from the initial straight strip surface of bed table foundation to shan qubo the surface of bed table to the hyperbolic wave surface of bed table , causes the table the process load , the returns - ratio and concentrates compared to all has the large scale enhancement 我厂生产摇床历史悠久,并不断开发创新,从最初的直条床面摇床基础上发展到单曲波床面摇床(上世纪70年代) ;到双曲波床面摇床(上世纪90年代) ,使摇床的处理量、回收率和富集比都有大幅度的提高。
In mathematics, Fresnel's wave surface, found by Augustin-Jean Fresnel in 1821, is a quartic surface describing the propagation of light in an optically biaxial crystal. Wave surfaces are special cases of tetrahedroids which are in turn special cases of Kummer surfaces.