The effective shear stress not only generalizes the flow intensity but also summarizes the flow intensities of mean flow velocity, stream power and unit stream power.
这一有效切应力不但是对切应力类水流强度指标的总结，还可以概括平均流速和水流功率等水流强度指标。
2
It makes the application of the mean-stream-line method in large space cascade design possible with the optimized given velocity distribution along suction surface also guaranteed.