袁新明,贺治国,毛根海
YUAN Xin-ming~1,HE Zhi-guo~2,MAO Gen-hai~2(1.Yangzhou University

• 1:扬州大学
• 2:浙江大学
• 3:浙江大学 江苏扬州225009
• 4:浙江杭州310027

摘要(Abstract)：

采用了RNG k-ε紊流模型和贴体坐标对截止阀对称面和三维流场进行了模拟,同时用粒子成像流速仪(PIV)对弯型截止阀对称面模型的测试结果和数值模拟结果进行了验证。数值模拟结果与实验结果吻合较好。实验和计算结果揭示了截止阀的流场特性,并说明截止阀水流产生的涡旋、分离流、二次流和强烈的紊动是截止阀水头损失的主要因素。计算结果表明斜进口截止阀流态好于弯型进口截止阀的流态,RNG k-ε紊流模型对具有分离和二次流的紊流流动具有较好的模拟性。
The RNG k-ε turbulence model has been applied to simulate turbulent flows in symmetrical planes and in three dimensions of curved inlet cut-off valves,and its performance is compared to the results measured by a particle image velocimetry(PIV) in the experiments.The governing equations are solved in a body-fitted coordinate by finite volume method with staggered grid system.The computed results of curved inlet cut-off valve are in good agreement with the experimental data and show that the flow pattern of inclined inlet cutoff valve is much better than that of curved inlet cut-off valve.The predicted results also show that the RNG k-ε turbulence model can be used to simulate the separated turbulent flows with vortices.

关键词(KeyWords)： 截止阀;粒子成像流速仪;RNGk-ε紊流模型;数值模拟;二次流
curved cut-off valve;Particle Image Velocimetry;RNG k-ε turbulence model;numerical simulation;secondary flow

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 袁新明,贺治国,毛根海
YUAN Xin-ming~1,HE Zhi-guo~2,MAO Gen-hai~2(1.Yangzhou University

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