提出了叶轮出口混合损失计算的简便公式。
The simple formulae for the mix loss at the outlet of impeller is presented.
扩张角的增加可提高速度环量，但是流动混合损失增加，总压恢复系数减小。
The increase of lobe diffusion angle results in the increase of velocity circulation at the lobe exit section, but it raises the mixing loss and lowers the pressure recovery coefficient.
实验数据的回归结果表明，在本实验条件下，主流流速和孔眼流速是造成混合损失的主要因素。
A simple polynomial regression for experimental data shows that main flow velocity and perforation flow velocity are main factors resulting in mixture loss under given conditions.
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