發(fā)布時間：2018-11-02 12:15

【摘要】：采用等環(huán)量扭曲規(guī)律設(shè)計的軸流泵葉片扭曲度大,在小流量工況下易造成根部沖角過大,使軸流泵效率明顯下降。通過葉根側(cè)等環(huán)量修正因子改變?nèi)~輪的幾何形狀,提高流動效率;并通過CFD數(shù)值計算驗(yàn)證改進(jìn)的葉輪模型。研究結(jié)果發(fā)現(xiàn),葉根側(cè)環(huán)量修正因子的變化對軸流泵葉輪效率、揚(yáng)程影響顯著。減小葉根側(cè)等環(huán)量因子,可以提高低流量工況的效率;但會使得大流量工況效率急劇惡化。對于研究的軸流泵模型,葉根處的等環(huán)量修正因子在0.3~0.55內(nèi)較為適宜。
[Abstract]:The axial flow pump blade designed by the law of equal annular volume distortion has a large twist degree, which is easy to cause too large an angle of attack at the root under the condition of small flow rate, and the efficiency of the axial flow pump is obviously reduced. The geometric shape of the impeller is changed by the equal-ring correction factor of the blade root side, and the flow efficiency is improved, and the improved impeller model is verified by CFD numerical calculation. The results show that the change of the side ring correction factor has a significant effect on the impeller efficiency and head of the axial flow pump. The efficiency of low flow condition can be improved by reducing the equal circulation factor of blade root side, but the efficiency of large flow condition will deteriorate sharply. For the model of axial flow pump studied, the equal-loop correction factor at the root of the blade is in the range of 0.3 ~ 0.55.
【作者單位】： 海軍裝備部;上海理工大學(xué)能源與動力工程學(xué)院;
【基金】：上海市科委科研計劃項(xiàng)目(13DZ2260900)資助
【分類號】：TH312

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本文編號：2305984