velocity head coefficient 流速水头系数
adiabatic head coefficient 绝热压头系数
universal head loss coefficient 通用压头损失系数
head-drag coefficient 头部阻力系数
coefficient of local head loss 局部水头损失系数
head loss coefficient 水头损失系数
coefficient of head loss 水头损失系数
coefficient of loss head 水头损失系数
The head coefficient, power coefficient, and efficiency decreased with increasing axial clearance.
随轴向间隙扩大，超小型泵的扬程系数、功率系数和效率都逐渐降低。
The analysis results show that the maximal value of the pump head coefficient declines when the flow rate increases;
结果表明：迷宫螺旋泵扬程系数最大值随流量的增大而减小；
The non-dimensional pump head coefficient tends to become larger than the quasi-steady value at the very beginning of the start, which indicates obvious transient effect.
在启动初始阶段，无量纲扬程呈现很大值，继而迅速减小到低于准稳态假设值，表现出明显的瞬态效应。
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