軸流泵內部三維湍流場數值模擬

摘要: 設計了一900 型號的軸流泵, 進行了軸流泵全流道的三維造型和數值模擬, 數值模擬采用基于雷諾平均Navier-Stokes 方程和標準模型, 采用了SIMPLEC 算法. 通過數值模擬得出了葉片表面速度和壓力分布規律. 通過分析結果表明:葉片表面的相對速度沿徑向逐漸增大, 其分布規律符合圓柱層無關性假設; 葉片發生汽蝕的危險區域位于葉片外緣進口邊到出口邊約1/ 4 處; 葉輪出口處流場呈螺旋形向外運動趨勢.
關鍵詞: 湍流場; 數值模擬; 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 .