反應(yīng)釜外文翻譯--在攪拌釜中大渦模擬的混合時(shí)間-其他專業(yè)-資料下載頁(yè)
【導(dǎo)讀】片水翼CBY葉輪被報(bào)道。葉輪旋轉(zhuǎn)是建模使用滑動(dòng)網(wǎng)格技術(shù)。獲得從實(shí)驗(yàn)和LES之間進(jìn)行了預(yù)測(cè)要比傳統(tǒng)的雷諾平均n-s方法要好。示蹤響應(yīng)預(yù)測(cè)的曲線由LES和實(shí)驗(yàn)之間來(lái)預(yù)測(cè)的。結(jié)果表明,LES是一個(gè)可靠的工。具來(lái)研究在攪拌罐里不穩(wěn)定周期行為的紊流。1介紹：機(jī)械攪拌罐廣泛應(yīng)用于許多工業(yè)過(guò)程。在攪拌釜中流結(jié)構(gòu)是高。度三維并且復(fù)雜,涵蓋范圍廣泛的空間和時(shí)間尺度。液體是通過(guò)坦克傳閱的作用。這個(gè)漩渦葉輪旋轉(zhuǎn)產(chǎn)生的,保留其相干就大量距離到散裝液體,伴。隨著高剪切率和強(qiáng)烈的湍流活動(dòng)。因此,他們是必不可少的在流場(chǎng)的混合性能。性,通常θ95為了達(dá)到95%以上最后的濃度。在任何情況下,混合時(shí)間的一個(gè)攪拌。釜通常用于指示其有效性。過(guò)去的30年廣泛的實(shí)驗(yàn)研究已報(bào)道混合時(shí)間。計(jì)算流體動(dòng)力學(xué)模擬混合過(guò)程擁有偉大的計(jì)算機(jī)技術(shù)的進(jìn)步。賴于精確的流體動(dòng)力學(xué)計(jì)算,特別是關(guān)于湍流建模。不同的軸徑向循環(huán)循環(huán)是預(yù)測(cè)下大舉CFD。流流動(dòng)不穩(wěn)定和準(zhǔn)周期性的行為。
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