• 2021-04-14
    如图,用抽水量Q=24m3/h的离心水泵由水池抽水,水泵的安装高程hs=6m,吸水管的直径为d=100mm,如水流通过进口底阀、吸水管路、90º弯头至泵叶轮进口的总水头损失为hw=0.4mH2O,该泵叶轮进口处的真空度pv等于()。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201901/97d75fc9f26342e28fb5040a6fb35d6e.png
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