It is also discovered that the axial velocity distribution and velocity-weighted average swirl Angle at the outlet section of axial-flow pump vary with the changing of wall roughness.
研究还发现，水泵出口断面轴向流速分布均匀度和速度加权平均偏流角也随壁面粗糙度改变而改变。
2
The paper analyzes the reasons why there are noises with Angle plunger pump and puts forward noise reduction measures.
分析了斜轴式柱塞泵产生噪声的原因，并提出了减低噪声的方法。
3
The experiment and calculating example show when concentration of polymer solution increases angle of lag of valve ball opening increases and pump admission coefficient drops.