軸流泵內(nèi)部三維湍流場(chǎng)數(shù)值模擬

摘要: 設(shè)計(jì)了一900 型號(hào)的軸流泵, 進(jìn)行了軸流泵全流道的三維造型和數(shù)值模擬, 數(shù)值模擬采用基于雷諾平均Navier-Stokes 方程和標(biāo)準(zhǔn)模型, 采用了SIMPLEC 算法. 通過(guò)數(shù)值模擬得出了葉片表面速度和壓力分布規(guī)律. 通過(guò)分析結(jié)果表明:葉片表面的相對(duì)速度沿徑向逐漸增大, 其分布規(guī)律符合圓柱層無(wú)關(guān)性假設(shè); 葉片發(fā)生汽蝕的危險(xiǎn)區(qū)域位于葉片外緣進(jìn)口邊到出口邊約1/ 4 處; 葉輪出口處流場(chǎng)呈螺旋形向外運(yùn)動(dòng)趨勢(shì).
關(guān)鍵詞: 湍流場(chǎng); 數(shù)值模擬; 軸流泵; 模型

Abstract :Atype of Axial Pump 900 is designed while the whole channel flowis simulated withthe 3Destablished model . The functions of Navier- Stokes , the standard model andthe method of SIMPLEC are adopted during simulationcalculation. The distributionlawof the
velocity and the pressure are also obtained by simulation. It shows that the relative velocityis graduallyincreased alongthe radial which coincidence withthe assumptionof cylindrical layer of independence . The results shows that the crisis area whichis easyto happencavitationis
locatedinthe 1/ 4 positionouter blade edge fromthe inlet to the exit side . The flowmovement inthe impeller outside shows spiral-shaped .