The mathematical model, the method for optimizing design, and the design principle of hydraulic parameters are proposed to make head-flowcurve flat.
流量曲线特点，提出了旋喷泵叶轮的优化设计数学模型、叶轮优化设计方法及水力参数的设计原则。
2
There exists a saddle type zone in the hydraulic moment curve of axial-flow pump blades which corresponds to the saddle zone of discharge-head characteristic curve of the pump.
轴流泵叶片水力矩随流量变化的关系曲线存在一个马鞍区，并与流量-扬程曲线的马鞍区相对应。
3
The article analyzes the hydraulic and thermal work condition, and temperature and flow change curve of heating source of the Indirect-connected and Mixing-connected system.