Investigation of turbulent mixing in a confined planar‐jet reactor
Investigation of turbulent mixing in a confined planar‐jet reactor
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有限平面射流反应器中湍流混合的研究
DOI：
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发表时间：
2005
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通讯作者：
James C. Hill
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作者：
Hua Feng;M. Olsen;Y. Liu;R. Fox;James C. Hill
采用粒子图像测速法（PIV）和平面激光诱导荧光法（PLIF）测量了液相受限平面射流反应器内的速度场和浓度场。根据测试截面的水力直径，在雷诺数为50,000的情况下，在距离射流分离器板的下游距离上分别测量了0、1、4.5、7.5、12和15个射流宽度。对速度场和浓度场数据进行平均速度、雷诺应力、湍流动能、标量均值和方差等流动统计分析。基于大涡PIV方法，利用速度场计算的应变率张量和Smagorinsky模型得到的亚网格尺度（SGS）应力，估计了湍流耗散率。计算流体动力学（CFD）模型，包括双层k - λ湍流模型、梯度扩散模型和标量耗散率模型，根据从该设施收集的实验数据进行了验证。实验结果与计算结果吻合较好。©2005美国化学工程师学会，2005
The velocity and concentration fields in a liquid-phase confined planar-jet reactor were measured using particle image velocimetry (PIV) and planar laser-induced fluorescence (PLIF). Measurements were taken at downstream distances from the jet splitter plates of 0, 1, 4.5, 7.5, 12, and 15 jet widths for a Reynolds number of 50,000 based on the hydraulic diameter of the test section. The velocity and concentration field data were analyzed for such flow statistics as mean velocity, Reynolds stresses, turbulent kinetic energy, and scalar mean and variance. The turbulence dissipation rate was also estimated based on a large-eddy PIV approach using the strain-rate tensors computed from velocity fields and the subgrid scale (SGS) stress obtained from the Smagorinsky model. Computational fluid dynamics (CFD) models, including a two-layer k–ϵ turbulence model, gradient-diffusion models, and a scalar dissipation rate model, were validated against experimental data collected from this facility. The experimental and computational results were found to be in good agreement. © 2005 American Institute of Chemical Engineers AIChE J, 2005