本文關(guān)鍵詞：一種全速域的計(jì)算方法及其應(yīng)用　出處：《應(yīng)用數(shù)學(xué)和力學(xué)》2016年06期 　論文類型：期刊論文

  更多相關(guān)文章： 計(jì)算流體力學(xué) 全速域流動(dòng) 預(yù)處理技術(shù) 時(shí)間相關(guān)法

【摘要】：針對(duì)原可壓縮流動(dòng)求解器不能用于低速不可壓縮流動(dòng)預(yù)測(cè)的缺點(diǎn),采用預(yù)處理技術(shù)對(duì)控制方程特征系統(tǒng)、隱式求解方法進(jìn)行修正,并采用預(yù)處理修正的AUSM+-up格式離散對(duì)流項(xiàng).采用修正后的求解器對(duì)無粘鼓包流動(dòng)、頂蓋驅(qū)動(dòng)粘性方腔流動(dòng)以及Laval(拉瓦爾)噴管流動(dòng)等算例進(jìn)行數(shù)值仿真,并將數(shù)值仿真結(jié)果與基準(zhǔn)解進(jìn)行對(duì)比.結(jié)果表明將預(yù)處理技術(shù)應(yīng)用于全速域流動(dòng)問題的求解是可行的,經(jīng)預(yù)處理修正后的求解器能夠用于低速、亞音速、跨音速以及超音速流動(dòng)問題的求解.
[Abstract]:Aiming at the disadvantage that the original compressible flow solver can not be used to predict the low speed incompressible flow, the preprocessing technique is adopted to modify the governing equation characteristic system and the implicit solution method. The modified AUSM scheme is used to discretize the convection term, and the modified solver is used to deal with the viscous bagging flow. Numerical simulation is carried out for the viscous square cavity flow driven by the roof and the Laval (Laval) nozzle flow. The numerical simulation results are compared with the reference solutions. The results show that it is feasible to apply the preprocessing technique to the solution of the flow problem in the full speed domain, and the modified solver can be used in the low speed and subsonic speed. The solution of transonic and supersonic flow problems.
【作者單位】： 中北大學(xué)機(jī)械與動(dòng)力工程學(xué)院;哈爾濱工業(yè)大學(xué)能源科學(xué)與工程學(xué)院;
【基金】：中國(guó)博士后科學(xué)基金(2011M500545)~~
【分類號(hào)】：O357.1
【正文快照】： 引言目前,時(shí)間相關(guān)法已經(jīng)在可壓縮流動(dòng)問題的數(shù)值仿真中獲得了極其廣泛的應(yīng)用,該方法在流動(dòng)控制方程組中引入“偽時(shí)間”項(xiàng),將亞音速、跨音速以及超音速流動(dòng)問題統(tǒng)一轉(zhuǎn)化為雙曲型方程,在時(shí)間方向上進(jìn)行推進(jìn)求解.但是將該方法應(yīng)用于低Mach數(shù)不可壓縮流動(dòng)問題中,會(huì)碰到“剛性”問

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