constant velocity joint 意思是球叉式万向节。()
constant velocity joint 意思是球叉式万向节。()
constant velocity joint 意思是球叉式万向节。()
Given the steady, incompressible velocity distribution V=x+y)i+C(x+y)j+0k,where C is a constant, if conservation of mass is satisfied, find the value of C. Write down the strain rate tensor Sij=0.5(uij+uji) and the vorticity vector(×V).
(清华大学2006—2007学年春季学期期中考试试题)Giyen the steady,incompressible velocity distribution V=x+y)i+C(x+y)j+0k,where C is a constant,if conservation of mass is satisfied,find the value of C.Write down the strain rate tensor Sij=0.5(uij+uji)and the vorticity vector(▽×V).
(清华大学2006--2007学年春季学期期中考试试题)A viscous liquid of constant density and viscosity falls due to gravity between two parallel plates a distance 2h apart,as in Fig.4-60.0ne plate is moving at speed w0.The flow is fully developed,that is,w=w(x) only.There are no pressure gradients,only gravity Set up and solve the Navier-Stokes equation for the velocity profile w(x).
It is crucial that you put together a well-thought-out personal statement for each job position applied for.()
A.A Red, Red Rose
B.Auld Lang Syne
C.My Heart" s in the Highlands
D.John Anderson, My Jo
题6一11图所示叶片式风扇质量2kg,转动惯量Jo=0.18kg.m2,在其轴O上作用一力偶矩M=3(1-e-0.2t)(N.m)(式中t以s计),若风扇从静止开始转动,试求t=4s时风扇的角速度。