[求助]流体中运动物体除了压阻、摩阻，为啥会还受 波阻和附加质量力的阻碍？

xumustc

流体中运动物体的表面受的力一积分，便可得到其受的阻力。
而表面受的力分为切向、法向的，切向的即摩阻，法向即压阻。
波阻还有附加质量的力产生的阻力，该是体积力的贡献不成？
谢谢！！

coolboy

Most models of generating waves by a moving body assume an ideal fluid, which will impose a wave drag to the moving body without a frictional drag. In reality, there is always a frictional boundary layer that will impose a frictional force to the moving body. In this case, if you assume that the waves are generated within the boundary layer, then, you do not need to include the wave drag. In other words, the effect of the wave drag has already been included in the frictional force.

xumustc

谢谢 coolboy   ！
原来所有这些阻力是因流体模型具有而定。

junior

I would rather include the wave drag into pressure drag. Actually, drag can always be put into pressure drag and friction drag, the shock wave may both affect these two drags, but the main effect is the increase of the pressure, therefore there appears a type of flight vehicle which is refered as waverider.

desertsouth

thanks
i see,too

ustcsunl

[这个贴子最后由ustcsunl在 2007/05/27 06:31pm 第 1 次编辑]

   
   
P.S.  xumustc  你是9905但又没有住校内的, from Prof. Y to Prof. T ？

xumustc

谢谢 !!!
sunl gg!