面特征无反射边界条件处理关键问题的直接数值模拟  

Direct Numerical Simulation of Characteristic Non-reflecting Boundary Conditions in Treatment of Face

作　　者：李德波[1] 樊建人[2] 易富兴[2] 卢树强[2] 岑可法[2] 

机构地区：[1]广东电网公司电力科学研究院,广州510060 [2]浙江大学能源清洁利用国家重点实验室,杭州310027

出　　处：《燃烧科学与技术》2012年第5期427-434,共8页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(50736006)

摘　　要：对特征无反射边界条件(characteristic non-reflecting boundary conditions)中面特征无反射边界条件处理方法进行了细致的研究,提出了新的数学处理方法,并通过大量的数值模拟研究表明,这种方法在处理边界上声波扰动引起的数值稳定性方面具有明显的优势.进行了可压缩圆孔射流直接数值模拟研究,数值模拟的结果与实验结果吻合比较好,表明本文提出的面特征边界数学处理方法是相对准确的.A new mathematical treatment of face boundary conditions is developed based on the theory of characteristic non-reflecting boundary conditions in this research. Several numerical tests are conducted, and it is found that this mathematical treatment is beneficial to the treatment of waves. A spatially evolving round jet is simulated by the direct numerical simulation method, and the numerical simulation results agree well with the experimental data, which verifies the feasibility of the new method proposed in this paper for treating face boundary conditions.

关 键 词：特征无反射边界条件 直接数值模拟 圆孔射流 面边界条件 

分 类 号：TK229[动力工程及工程热物理—动力机械及工程]