velocity-head coefficient

The effects of contact pressure and sliding velocity on the frictional coefficient of zinc-coated sheets were studied by sliding test, including hot-dip galvanized, electro-galvanized, pre-phosphated electro-galvanized and galvannealed sheets.

本文采用平板摩擦试验研究了正压力和滑动速度对热镀纯锌、电镀纯锌、预磷化电镀纯锌和热镀锌铁合金摩擦系数的影响。

However, the friction coefficient between Ni and APS increased with sliding velocity increasing and reduced with load increasing.

而镍与APS间的摩擦系数随滑动速度的增大而增大，随载荷的增大而减小。

The effect of operation pressure on the specific impulse of tactical missile solid motors is analyzed from several factors, such as characteristic velocity, thrust coefficient, impulse coefficients of the chamber and nozzle.

从固体发动机的特征速度、推力系数、燃烧室冲量系数和喷管冲量系数等因素出发，分析了发动机工作压强对战术固体火箭发动机比冲的影响。

Influence of parameters such as attenuation coefficient, velocity of sound, and temperature of medium on focusing sound field generated by a self-focused concave spherical radiator has been studied through numerical simulation with Ray-leigh integral.

以凹球面自聚焦超声换能器为例，用瑞利积分进行数值模拟计算，研究声衰减、声速、温度等参数对声聚焦的影响，并对不同生物组织中声聚焦的特点进行了比较。

Numerical results show that the convergence velocity of the complex-mode Galerkin method is higher than that of the real mode Galerkin method for a variable coefficient gyroscopic system.

数值结果表明，复模态Galerkin方法相比实模态Galerkin方法对变系数陀螺系统有较高的收敛速度。