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发表于 2014-10-16 17:39:57
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来自 浙江杭州
“总压=静压+动压,既然这样那么在泵或风机进口处静压和总压大小一样”
This is not correct sir, total pressure=statice presure + dynamic pressure. if the fluid have a velocity at the inlet of then pump(of course it does), then it has a dynamic pressure. if dynamic pressure ≠ 0, then static pressure<total pressure.
BTW, average static pressure means the average static pressure on a area is xPa,
if there is 1000 nodes on the outlet, you use a static pressure boundary, it means the static pressure of all 1000 nodes is 1000. but if you use a average static pressure boundary condition, it means the static pressure in all 1000 nodes can be different, but the average value of the static pressure of these nodes is xPa |
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