The great number of moving parts, the sliding friction, the reversal of direction at rapid intervals, and the mechanical shock involved all contribute to severe wear.
大量运动部件、滑动摩擦、极短时间内运动方向的变化以及机械冲击等都使摩损加剧。
The order of slip boundary condition shows an apparent influence on the friction coefficient but only a slight influence on the Nusselt number if compressibility is ignored.
在不考虑可压缩性因素时,滑移边界条件的阶数对阻力系数的影响较大,对换热系数的影响不是十分明显。
In high Reynolds number range of 10,000 ~ 90,000, the flow friction factor, local and average convection heat transfer coefficients were determined.
在10,000 ~ 90,000的高雷诺数范围内,测量了流动摩擦系数、局部和平均对流换热系数。
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