湍流化学反应的分形数值模拟  

Fractal Numerical Simulation for Turbulent Chemical Reaction

作　　者：张建文[1] 王艳飞[2] 

机构地区：[1]北京化工大学经济管理学院,北京100029 [2]北京化工大学化学工程学院,北京100029

出　　处：《火炸药学报》2007年第3期5-8,15,共5页Chinese Journal of Explosives & Propellants

基　　金：国家自然科学基金资助项目(20576007);教育部归国留学人员启动基金资助

摘　　要：基于涡串唯象概念和分形理论,建立了能够表达湍流多尺度结构物理特性的分形湍流化学反应模型,针对Steckler室内燃烧过程进行了数值模拟研究。湍流流动采用浮力修正的κ-ε双方程模型来模拟,辐射由Rosseland模型描述,整个模拟过程由ANSYS-CFX10.0实现。将模拟结果与Steckler的燃烧实验数据进行对比,并与EDC燃烧模型及文献中EBU燃烧模型的模拟结果进行对比。结果表明,FM燃烧模型模拟得出的温度、速度场分布与实验数据能够较好地吻合,是一种有前途的湍流化学反应模拟方法。The fractal model （FM） of turbulent chemical reaction is developed based on the phenomenological concept of vortex cascade and fractal theory. The numerical simulation of the Steckler＇s room fire is carried out with the fractal model of turbulent combustion chemical reaction and the eddy-dissipation-concept （EDC） model by CFD software-ANSYS CFX 10.0. The two equations κ-ε turbulent model with buoyancy modification is used and Rosseland radiation model is applied to take radiation into consideration. To validate FM model, comparisons and analysis are made for fire scenarios of Steckler. Comparisons are also made with the numerical simulations from other combustion models including the eddy dissipation model and the eddy break-up model for the same fire experiments. The results show that the temperature and velocity distribution using FM simulation give better results illustrating FM is a promising mathematical model for turbulent chemical reaction.

关 键 词：物理化学 分形 湍流化学反应 CFX 数值模拟 

分 类 号：TQ054[化学工程]