發(fā)布時間：2018-04-21 03:08

  本文選題：氣液兩相撞擊流 + 撞擊流反應器�。� 參考：《化學反應工程與工藝》2017年03期

【摘要】：為了提高氣液撞擊流反應器(G-LISR)的混合性能,找到合適氣相入口速度的操作參數,采用ANSYS Workbench中的Geometry模塊,基于歐拉·拉格朗日法建立G-LISR氣液兩相流動數學模型。在加速管對置距離為400mm,液相入口速度為5m/s,三種不同的氣相入口速度(10,15,20m/s)條件下,用數值模擬軟件Fluent分析模擬出了不同氣相入口流速下反應器內流場的分布特征。模擬結果表明:隨著氣相入口初始流速的增大,反應器內湍流強度有所增加,在壓力波動最為劇烈的撞擊面中心點處,壓力急劇增大。增大氣相初始流速,將降低反應器中的液滴的濃度分布,減少了液相在反應器中的停留時間。從能量損耗和氣液兩相在反應器中的混合效果來看,氣相初始流速不宜過大,10m/s為較佳。
[Abstract]:In order to improve the mixing performance of gas-liquid impinging flow reactor (G-LISR) and find the appropriate operating parameters of gas inlet velocity, the G-LISR gas-liquid two-phase flow mathematical model was established by using the Geometry module in ANSYS Workbench and based on Euler Lagrangian method. Under the conditions of 400 mm set distance of accelerator tube, 5 m / s liquid inlet velocity and three different gas phase inlet velocities of 10151520m / s, the distribution characteristics of reactor inner flow field at different gas inlet velocities were simulated by numerical simulation software Fluent. The simulation results show that the turbulence intensity in the reactor increases with the increase of the initial velocity of the gas inlet, and the pressure increases sharply at the central point of the impingement surface where the pressure fluctuates most intensely. The increase of initial gas flow rate will reduce the concentration distribution of droplets in the reactor and reduce the residence time of liquid phase in the reactor. From the point of view of the energy loss and the mixing effect of gas-liquid two-phase in the reactor, the gas phase initial velocity should not be too large or 10 m / s.
【作者單位】： 武漢工程大學機電工程學院;武漢鑫瑞澤科技有限公司;
【基金】：國家自然科學基金(51276131)
【分類號】：TQ052
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本文編號：1780648