本文選題：大渦模擬 + 離散相模型　； 參考：《上海理工大學(xué)學(xué)報(bào)》2017年02期

【摘要】：為了探究聚苯乙烯顆粒在射流場(chǎng)中的跟蹤效果,采用大渦模擬(LES)方法求解射流流場(chǎng),并與實(shí)驗(yàn)結(jié)果進(jìn)行對(duì)比,以驗(yàn)證流場(chǎng)模型.定義了密度與水相同的5種不同粒徑的虛擬顆粒,采用離散相模型(DPM)計(jì)算其運(yùn)動(dòng)軌跡,將其響應(yīng)時(shí)間的理論分析結(jié)果與數(shù)值模擬結(jié)果進(jìn)行對(duì)比,驗(yàn)證了DPM模型的準(zhǔn)確性.隨后對(duì)粒徑范圍為1~400μm的11種不同粒徑的聚苯乙烯顆粒在一定雷諾數(shù)射流流場(chǎng)中的跟隨特性進(jìn)行了模擬計(jì)算,并與初始時(shí)刻相同位置的質(zhì)點(diǎn)運(yùn)動(dòng)軌跡進(jìn)行對(duì)比分析.結(jié)果表明,流場(chǎng)的復(fù)雜變化對(duì)顆粒的跟隨性有很大影響,這表現(xiàn)在即使顆粒粒徑很小時(shí),顆粒與流場(chǎng)的速度依然存在一定偏差.在所研究工況下,粒徑小于200μm的聚苯乙烯顆粒與水的速度偏差大部分在20%以內(nèi).
[Abstract]:In order to investigate the tracking effect of polystyrene particles in the jet field, the large eddy simulation (les) method is used to solve the jet flow field, and the experimental results are compared to verify the flow field model. Five kinds of virtual particles with the same density as water were defined. The motion trajectory was calculated by discrete phase model (DPM). The theoretical analysis results of the response time were compared with the numerical simulation results, and the accuracy of the DPM model was verified. Then, the following characteristics of 11 polystyrene particles with different particle sizes in the flow field of a certain Reynolds number jet are simulated and calculated, and the trajectory of particle motion at the same position at the initial time is compared and analyzed. The results show that the complex variation of the flow field has a great influence on the particle following performance, which shows that even if the particle size is very small, there is still a certain deviation between the particle and the velocity of the flow field. Under the studied conditions, the velocity deviation between polystyrene particles with diameter less than 200 渭 m and water is mostly within 20%.
【作者單位】： 上海理工大學(xué)能源與動(dòng)力工程學(xué)院;上海理工大學(xué)上海市動(dòng)力工程多相流動(dòng)與傳熱重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51576130) 上海市科委科研計(jì)劃(13DZ2260900) 上海市教委資助項(xiàng)目(14CG46)
【分類號(hào)】：O358

【相似文獻(xiàn)】

相關(guān)期刊論文 前2條

1 蔡楚江;沈志剛;肖昆;邢玉山;麻樹(shù)林;;一種高散射率PIV實(shí)驗(yàn)用示蹤粒子的制備[J];實(shí)驗(yàn)流體力學(xué);2005年04期

2 ;[J];;年期

相關(guān)碩士學(xué)位論文 前1條

1 李志平;激光粒子圖像測(cè)量中示蹤粒子特性及實(shí)驗(yàn)方法研究[D];天津大學(xué);2007年

，

本文編號(hào)：1775038