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發(fā)布時(shí)間: 2012-11-11 22:56
正文摘要:汽蝕余量是指泵人口處液體所具有的總水頭與液體汽化時(shí)的壓力頭之差,用Dh表示。汽蝕余量又有有效汽蝕余量Dha和必需汽蝕余量Dhr之分。 Dha—指泵工作時(shí)實(shí)際所具有的汽蝕余量,取決于泵 ... |
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