本文選題：分層流　切入點(diǎn)：尾跡　出處：《哈爾濱工程大學(xué)學(xué)報(bào)》2016年09期 　論文類型：期刊論文

【摘要】：為達(dá)到研究連續(xù)分層流中航行潛體尾跡探測之目的,探討了線性分層流中基于多相流混合模型的圓柱繞流數(shù)值模擬方法。首次采用LES方法數(shù)值模擬了高傅汝德數(shù)下分層流動(dòng),成功模擬出試驗(yàn)條件下對(duì)應(yīng)傅汝德數(shù)下的尾跡特征;用RANS方法實(shí)現(xiàn)了對(duì)低傅汝德數(shù)低雷諾數(shù)下分層流動(dòng)流場的定量描述;通過對(duì)高雷諾數(shù)不同湍流模型下的流動(dòng)展開討論,發(fā)現(xiàn)采用不受各向同性假設(shè)限制的RSM模型進(jìn)行分層湍流數(shù)值模擬是合理的,且對(duì)近壁面的處理要采用壁面函數(shù)的方法�；诙嘞嗔骰旌夏Ｐ徒⒘烁等甑聰�(shù)從低到高,粘性模型從層流至湍流各個(gè)取值段模擬分層流動(dòng)的數(shù)值方法。
[Abstract]:In order to study the detection of submersible wake in continuous stratified flow, a numerical simulation method based on the mixed model of multiphase flow in linear stratified flow is discussed. The LES method is used to simulate stratified flow at high Fourier number for the first time. The wake characteristics corresponding to Fourier number under experimental conditions are successfully simulated, the quantitative description of stratified flow field under low Reynolds number and low Fourier number is realized by RANS method, and the flow under different turbulence models with high Reynolds number is discussed. It is found that it is reasonable to use the RSM model, which is not restricted by isotropic hypothesis, to simulate stratified turbulence, and the method of wall function is used to deal with the near wall. Based on the mixed model of multiphase flow, the Fourier number is established from low to high. A numerical method for simulating stratified flow from laminar flow to turbulent flow.
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本文編號(hào)：1625344