作业帮流体力学 作业 怎么翻译
来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/05/15 03:04:03
流体力学 作业 怎么翻译
The flow of a lubricating oil of viscosity 0.2 Pa.s occurs in a friction bearing such as that shown in
Fig. A difference in velocity of 0.5 m/s between the upper plate (the rotating wheel) and the stationary
lower plate (the axle of diameter 5 cm) corresponds to a rate of rotation of 190.6 rpm in Fig. If the
length L of the bearing is 5 cm, calculate the rate at which mechanical energy is degraded to thermal
energy by friction during rotation at 190.6 rpm.
你这不是谷歌的吗 这也不通顺呀
The flow of a lubricating oil of viscosity 0.2 Pa.s occurs in a friction bearing such as that shown in
Fig. A difference in velocity of 0.5 m/s between the upper plate (the rotating wheel) and the stationary
lower plate (the axle of diameter 5 cm) corresponds to a rate of rotation of 190.6 rpm in Fig. If the
length L of the bearing is 5 cm, calculate the rate at which mechanical energy is degraded to thermal
energy by friction during rotation at 190.6 rpm.
你这不是谷歌的吗 这也不通顺呀
如图所示 ,在滑动轴承中,润滑油的 粘度0.2Pa.s,上、下板的速度差为 0.5 m/s（怀疑此处是指两板的间隙为0.5mm,这个题目要利用两板之间的间隙通过牛顿内摩擦定律求解,估计原英文为：A difference 0.5mm between the upper plate (the rotating wheel) and the stationary lower plate）,上板即为转速为190.6 rpm的轴承套（内表面）,下板即为静止不动、轴径为5cm轴颈（外表面）.如果轴承长度为5cm,轴承套转速保持190.6 rpm时,试计算由于摩擦而引起的机械能转变为热能的速率.
（这个题其实就是要你把两表面之间的速度看成线性变化的,然后利用牛顿的内摩擦定律计算摩擦力,摩擦力在乘以角速度就是摩擦功率,由于摩擦而消耗的能量可以看成是发热而消耗了,所以这个摩擦功率就是发热功率,即发热的速率）
（这个题其实就是要你把两表面之间的速度看成线性变化的,然后利用牛顿的内摩擦定律计算摩擦力,摩擦力在乘以角速度就是摩擦功率,由于摩擦而消耗的能量可以看成是发热而消耗了,所以这个摩擦功率就是发热功率,即发热的速率）