摘要
空冷电厂中的直接空冷岛易受到环境风的影响,因而计算直接空冷岛周边流场和温度场对于设计和优化空冷岛的体型和工况具有重要的意义。文章采用建立在非结构网格有限体积法上的RNGk-ε湍流模型对直接空冷岛进行了流场和温度场的计算,压力和速度耦合采用来SIMPLEC算法。数值模拟获得了直接空冷岛周围的流场和温度场,计算发现通过设置挡风墙未出现热风回流现象,计算结果表明采用的RNGk-ε湍流模型及相关参数设置合理。文章提出的计算方法适合于直接空冷岛的流场及温度场的计算。
Direct air cooled island is effected by environmental-wind easily,so computational for flow field and temperature field is of great importance to design and optimize the shape and operation point.RNG k-ε turbulence model on unstructured mesh finite volume method is used to compute the flow field and temperature field.SIMPLEC algorithm is used to coupute the velocity and pressure.Numerical simulation gives out the flow field and temperature field near the direct air cooled island.Hot wind recirculation was not observed from the numerical simulation since wind wall is added.Computing result indicates that RNG k-ε turbulence model and related parameters are reasonable and the method adopted in this paper is suitable for the computation of the flow field and temperature field near the direct air cooled island.
出处
《企业技术开发》
2010年第8期45-46,共2页
Technological Development of Enterprise
关键词
直接空冷岛
RNGk-ε湍流模型
边界条件
热风回流
direct air cooled island
RNG k-ε turbulence model
boundary condition
hot air recirculation
