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流體機(jī)械旋轉(zhuǎn)湍流計(jì)算模型研究進(jìn)展
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國(guó)家自然科學(xué)基金項(xiàng)目(51139007)和“十二五”國(guó)家科技支撐計(jì)劃項(xiàng)目(2015BAD20B01)


Research Progress of Computational Model for Rotating Turbulent Flow in Fluid Machinery
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    摘要:

    旋轉(zhuǎn)湍流是泵,、水輪機(jī)、風(fēng)力機(jī)和壓縮機(jī)等流體機(jī)械中的典型流動(dòng)現(xiàn)象,,其三維隨機(jī)脈動(dòng)特性很強(qiáng),,具有逆壓梯度高,、流線曲率大、壁面影響突出等特點(diǎn),。目前存在多種湍流模型,,但都有各自的適用范圍,尚不存在一個(gè)通用的湍流模型?,F(xiàn)有湍流模型在物理和數(shù)值方面的預(yù)測(cè)性能還未達(dá)到流體機(jī)械實(shí)際需求,。針對(duì)強(qiáng)旋轉(zhuǎn)和大曲率流動(dòng),本文闡述了湍流模型的發(fā)展,。從湍流核心區(qū)的高雷諾數(shù)流動(dòng),、近壁區(qū)低雷諾數(shù)流動(dòng)和層流到湍流的轉(zhuǎn)捩流動(dòng)等不同方面,分析了現(xiàn)有湍流模型在流體機(jī)械中的適用性,。指出了典型湍流模型在求解旋轉(zhuǎn)湍流時(shí)存在的問題,,探索了針對(duì)不同求解目標(biāo)引用不同湍流模型的有效途徑和方法,對(duì)湍流模型的發(fā)展趨勢(shì)及湍流模型在流體機(jī)械中的應(yīng)用進(jìn)行了展望,。

    Abstract:

    Rotating turbulent flows are widely existed in pumps, turbines, compressors and other fluid machinery. The three-dimensional stochastic fluctuations are very strong in this kind of flow. The high adverse pressure gradient, large streamline curvature and complex wall surface in rotating turbulent flow have significant effects on the performance of fluid machinery. Although a lot of turbulence models have been developed, there is no universal turbulence model that could be used to simulate rotating turbulent flow in fluid machinery. Each turbulence model has its own applicable scope. The prediction performance of the existing turbulence models either in physical or numerical aspects has not yet met the actual need of fluid machinery. Aiming at strong rotating and large curvature turbulent flow, the turbulence models were reviewed. From three aspects of the high Reynolds number flow in turbulent core area, the low Reynolds number flow near wall and the transition flow from laminar to turbulent areas, the applicability of existing turbulence models for fluid machinery was analyzed. The problems of two series turbulence models, including Reynolds-averaged Navier-Stokes models and scale-resolving simulation models used in solving rotating turbulent flow were compared. The typical Reynolds-averaged Navier-Stokes models introduced included Spalart-Allmaras, k-ε, k-ω , V2F and RSM models. The typical scale-resolving simulation models included LES, SAS, DES and ELES models. The effective methods to use the suitable turbulence model for different problems and different targets were investigated. The development trend of turbulence model and the application of turbulence model in fluid machinery were discussed.

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王福軍.流體機(jī)械旋轉(zhuǎn)湍流計(jì)算模型研究進(jìn)展[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2016,47(2):1-14. Wang Fujun. Research Progress of Computational Model for Rotating Turbulent Flow in Fluid Machinery[J]. Transactions of the Chinese Society for Agricultural Machinery,2016,47(2):1-14.

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  • 收稿日期:2015-11-27
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  • 在線發(fā)布日期: 2016-02-25
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