三维湍流流动的涡量-向量势法数值模拟

MATHEMATICAL MODELLING OF 3-DIMENSIONAL TURBULENT FLOW BY VORTICITY-VECTOR POTENTIAL METHOD

摘要

摘要:本文采用涡量-向量势法,结合常规的 k-ε双方程湍流模型,并运用重新推导的固体壁面涡量边值计算法,对扁平射流煤粉燃烧器内的冷态三维流场进行了数值模拟。计算结果与实验数据相吻合。本文工作证明,用涡量-向量势法求解三维湍流问题是可行的,该法具有不应忽视的优越性,值得进一步开发。

Abstract:The vorticity-vector potential method and k-ε two-equation turbulence model are applied for numerical simulation of the 3-dimensional isothermal flowfield in a flat jet combustor. A new equation to calculate the values of vorticity components on solid surfaces is introduced. Conditions which should be satisfied in order to define boundary conditions of vector potential are discussed. The computed results agree with the experimental measurements on the whole. It is shown that the vorticity-vector potential m...