摘要
采用涡耗散概念(EDC)模型,对等离子发生器内三维湍流燃烧流场进行数值模拟.燃料采用甲烷.在数值模拟时,湍流模型采用RNG模型,欧姆热电弧用等效热弧代替.数值模拟结果得出了在空气过量系数α<1情况下的流场特性参数和产物分布.通过对数值模拟结果的分析,实现了EDC模型对多步化学反应的模拟和对活性物质的预测,并为优化设计等离子发生器结构,更好地组织燃烧流场提供了依据.
The eddy-dissipation-concept (EDC) model is used to simulate the three-dimensional combustion process in a plasma generator. The simulation is made with CH4 as the fuel and RNG turbulence model is employed. An equivalent heat substitutes for the Ohm heating electric-arc. The numerical simulation attains the parameters of flow field and product distribution in the case of excess air coefficient α<1. The results show that the EDC model is rational in simulating the multi-step chemical reaction and predicting the existence of active substances.This study provides the basis for optimizing the design of plasma generator and better organizing the flow.
出处
《应用科技》
CAS
2005年第4期48-50,共3页
Applied Science and Technology
关键词
涡耗散概念(EDC)模型
等离子发生器
湍流
数值模拟
eddy-dissipation-concept (EDC) model
plasma generator
turbulent flow
numerical simulation
