本文選題：離心泵 + 分流葉片�。� 參考：《水力發(fā)電》2017年08期

【摘要】：為了進(jìn)一步優(yōu)化離心泵葉輪流道,提高離心泵的空化性能,對有/無分流葉片離心泵進(jìn)行全流道三維非定常湍流空化數(shù)值模擬,分析0.4Q~1.0Q工況下泵的空化性能。結(jié)果顯示:在空化充分發(fā)展的情況下,無分流葉片離心泵揚(yáng)程對NPSH的降低比較敏感;添加分流葉片后,離心泵的揚(yáng)程提高,葉輪進(jìn)口部位的低壓區(qū)域減少,葉輪內(nèi)湍動能明顯減小,泵的抗空化性能明顯增強(qiáng);隨著流量的降低,泵的臨界空化余量降低,但泵內(nèi)發(fā)生嚴(yán)重空化的速率逐漸加快;當(dāng)離心泵內(nèi)發(fā)生嚴(yán)重空化時,空泡將堵塞整個葉輪流道。
[Abstract]:In order to further optimize the impeller passage of centrifugal pump and improve the cavitation performance of centrifugal pump, the three-dimensional unsteady turbulent cavitation numerical simulation of the centrifugal pump with and without shunt vane is carried out, and the cavitation performance of the pump under 0.4Q / 1.0Q condition is analyzed. The results show that, with the full development of cavitation, the head of centrifugal pump without shunt vane is sensitive to the decrease of NPSH, and the lift of centrifugal pump increases and the low pressure area of impeller inlet decreases after adding shunt blade. The turbulent kinetic energy in impeller is obviously reduced and the anti-cavitation performance of pump is obviously enhanced. With the decrease of flow rate, the critical cavitation margin of pump decreases, but the rate of serious cavitation in pump increases gradually; when serious cavitation occurs in centrifugal pump, The cavitation will block the entire impeller passage.
【作者單位】： 西華大學(xué)能源與動力工程學(xué)院;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(51379179) 流體及動力機(jī)械四川省科技創(chuàng)新研究團(tuán)隊(duì)(2011JTD0016) 西華大學(xué)研究生創(chuàng)新基金項(xiàng)目(ycjj2016096)
【分類號】：TH311
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本文編號：2032893