摘要
采用有限体积法的中心格式求解Navier-Stokes方程,分别使用零方程Baldwin-Lomax和方程Spalart-Allmara两种湍流模型,对通风机内流场进行了研究。通过具体算例对这两种湍流模型进行比较,并发现它们在通风机流场计算中有所不同。Baldwin-Lomax模型结构简单,使用方便,而Spalart-Allmaras模型的特点在于它的壁面附近不需要非常精细的网格,同时在黏性层、分离区的分辨能力也比Baldwin-Lomax模型高,但所需的计算时间比Baldwin-Lomax模型要长。
Based on the central formulation of the finite volume method,Navier-Stokes equations are solved and the internal flow field of the fan is analyzed by turbulence models of Baldwin-Lomax and Spalart-Allmaras equations. With some particular examples,the two models are compared and some differences during their calculations of the flow field are discoverd. Baldwin-Lomax model is simple and convenient,while Spalart-Allmaras model has the following features：subtle grids need not to be nearby its walls,its resolution in sticky layers and separation regions are higher than those in the former model,but it costs more calculated time.
出处
《矿山机械》
北大核心
2010年第7期22-25,共4页
Mining & Processing Equipment
