考慮旋轉(zhuǎn)和曲率的湍流模型修正及應(yīng)用
[Abstract]:By analyzing the problems existing in the turbulent model in simulating the internal flow of rotating machinery with rotating and bending walls, it is found that, Considering the rotation and curvature effects on the basis of the original turbulence model is the inevitable choice to improve the accuracy of flow simulation and improve the flow instability of centrifugal pump. By considering rotation and curvature correction in k- 蠅 SST model and introducing Hellsten's Richardson number correction model and extended inner rotation Zhang Liang correction, a new turbulence model is generated. The improved turbulence model is used to compare the internal flow field of the centrifugal pump with a rotational number of 34.34 under different operating conditions, and the numerical results before and after the improvement are compared with the experimental results in detail. The distribution of the flow field in the pump is analyzed. The results show that the energy performance predicted by the improved turbulence model is closer to the experimental value. Under 0.6 times design flow condition, the prediction accuracy of the improved turbulence model is improved by 3%, and the efficiency accuracy is improved by nearly 2%. This conclusion has been verified in the internal flow field. Compared with the original turbulence model, the improved turbulence model obviously improves the flow in the impeller passage and the volute diffusion section. The results can provide a reference for the study of turbulence model.
【作者單位】: 浙江工業(yè)大學(xué)之江學(xué)院;浙江理工大學(xué)機(jī)械與自動(dòng)控制學(xué)院;浙江工業(yè)大學(xué)機(jī)械工程學(xué)院;
【基金】:浙江省自然科學(xué)基金資助項(xiàng)目(LQ15E090005,LQ15E090004) 中國(guó)博士后科學(xué)基金資助項(xiàng)目(2016M590546) 國(guó)家自然科學(xué)基金資助項(xiàng)目(51409233) 浙江工業(yè)大學(xué)自然科學(xué)基金重點(diǎn)資助項(xiàng)目(2014X2015)
【分類號(hào)】:TH311
【相似文獻(xiàn)】
相關(guān)期刊論文 前8條
1 趙會(huì)晶;王志恒;孫曄晨;樊宏周;席光;;湍流模型對(duì)高壓比離心壓縮機(jī)氣動(dòng)性能及流場(chǎng)結(jié)構(gòu)影響的數(shù)值研究[J];風(fēng)機(jī)技術(shù);2014年03期
2 吳瓊;葉騫;孟國(guó)香;;不同湍流模型在旋流非接觸搬運(yùn)器仿真中的應(yīng)用和對(duì)比[J];上海交通大學(xué)學(xué)報(bào);2013年03期
3 張征宇;張治權(quán);吳湘蓮;朱文彬;;湍流模型對(duì)閥門數(shù)值模擬精度的影響[J];閥門;2008年01期
4 譚禎;李朝峰;太興宇;聞邦椿;;不同湍流模型旋轉(zhuǎn)葉片氣固耦合動(dòng)力學(xué)特性研究[J];振動(dòng)與沖擊;2013年11期
5 曹璞鈺;王洋;李亞成;;湍流模型在小型潛水泵性能預(yù)測(cè)中的應(yīng)用[J];流體機(jī)械;2014年06期
6 任蕓;劉厚林;舒敏驊;吳賢芳;吳登昊;;考慮旋轉(zhuǎn)和曲率影響的SST k-ω湍流模型改進(jìn)[J];農(nóng)業(yè)機(jī)械學(xué)報(bào);2012年11期
7 張淑佳;李賢華;朱保林;胡清波;;k-ε渦粘湍流模型用于離心泵數(shù)值模擬的適用性[J];機(jī)械工程學(xué)報(bào);2009年04期
8 ;[J];;年期
相關(guān)碩士學(xué)位論文 前1條
1 楊倩;基于不同湍流模型的離心泵內(nèi)部流場(chǎng)數(shù)值模擬與分析[D];蘭州理工大學(xué);2010年
,本文編號(hào):2335283
本文鏈接:http://sikaile.net/kejilunwen/jixiegongcheng/2335283.html