正弦交叉波纹填料三维流场的数值模拟  

Numerical Simulation of Three-Dimensional Flow Field with Sinusoidal Cross-Corrugation Channels

作　　者：辛军哲[1] 曹旭楠 Xin Junzhe;Cao Xunan(Guangzhou University,Guangzhou 51000,China)

机构地区：[1]广州大学,广东广州510000

出　　处：《化学反应工程与工艺》2018年第4期325-333,364,共10页Chemical Reaction Engineering and Technology

摘　　要：为了得到正弦交叉波纹通道三维流场内部速度场与压力场的分布特点,选用了相互交叉的相邻两个正弦波纹板之间的流道作为计算区域,对其建立了三维模型,运用低雷诺数(Re)k-ε紊流模型对此正弦交叉波纹通道进行了数值模拟,得到了正弦交叉波纹通道三维流动区域的速度场和压力场在局部微观区域的分布特点。结果显示,各通道的流量在流动过程中受边界影响较大,在不同的交叉位置处会发生变化,从而在出口断面上互不相同,但其变化又有一定的规律可循。二次流旋涡主要在进口处和靠近边壁的位置产生,旋涡的大小在流动过程中呈下降的趋势。针对不同的进口空气流速,计算出其压降随进口速度的变化规律,与参考文献的结果进行了比较,验证了结果的可靠性。In order to obtain the distribution characteristics of the velocity field and pressure field inside the three-dimensional flow field of the sinusoidal intersecting corrugated channel, the flow paths between two adjacent sinusoidal corrugated plates were used as the calculation area and a three-dimensional model was established. The sinusoidal cross-corrugation channel was numerically simulated using low Reynolds number k-ε turbulence model. The distributions of velocity and pressure field in the local microscopic region of the three-dimensional flow region of the sinusoidal intersecting corrugated channels were obtained. The results showed that flow rate of each channel was greatly affected by the boundary during the flow process and the rate changed at each intersection. As a result, the flow rate was different at exit section, but the changes in flow rate have certain rules to follow. The secondary flow vortex was generated primarily at the inlet and near the side wall. The size of the vortex tended to decrease during the flow. According to the different inlet air flow rates, the variation law of pressure drop with the inlet velocity was calculated, and compared with those of the references to verify the reliability of the results.

关 键 词：正弦交叉波纹通道 数值模拟 低雷诺数k-ε模型 二次流旋涡 

分 类 号：TB657.5[一般工业技术—制冷工程]