當(dāng)流體以a1=90°的方向進(jìn)入葉輪時,離心泵無限多葉片的理論揚程為()
A.A B.B C.C D.D
A.1mH2O=9.81*10-2MPa B.1mH2O=9.81*10-3MPa C.1mH2O=9.81*10-4MPa D.1mH2O=9.81*10-5MPa
A.混流泵 B.活塞泵 C.離心泵 D.軸流泵