导叶叶片数对气液混输泵性能的影响

以自主研制的第三代YQH-100气液混输泵为研究对象,利用Fluent流场模拟软件进行数值模拟.通过对叶片式气液混输泵不同导叶叶片数及不同含气率时的流场进行数值模拟,得出混输泵叶轮、导叶压力场及速度分布,进而得到不同工况下整机效率及相对扬程曲线.经分析在不同含气率下,各导叶叶片数的效率及相对扬程均随着含气率的增大而降低;在相同含气率下,导叶叶片数为13时整机效率明显高于其他2种情况的整机效率,相对扬程也是在导叶叶片数为13时最大,且9叶片数情况要稍好于15叶片数情况.由此表明选用导叶叶片数为13时可以提高气液混输泵的整机性能.

Effect of number of guide pulley vane on performance of gas-liquid mix-transporting pump

Taking the third generation YQH-100 gas-liquid mix-transporting multiphase pump as investigation object,its numeric simulation was conducted by using Fluent software for simulation of flow field and under the condition of different number of guide vane and gas content.The pressure field and velocity distribution of moving and stationary vanes were derived and the overall efficiency and relative head curve were obtained further.It was shown by analysis that for different gas content,the overall efficiency and relative head decreased with the gas content for different number of guide vane.With identical gas content,the overall efficiency would be significantly higher than that of other two cases when the number of guide vane was 13.The relative head would exhibit in the same way.The pump performance would be slightly better in the case of 9 guide vanes than that of 15 vanes.Therefore,when the number of guide vane was 13,the overall performance of the multiphase pump could be improved.