刷式封严流动和换热的数值模拟

NUMERICAL SIMULATION ON FLUID FLOW AND HEAT TRANSFER OF A BRUSH SEAL CONFIGURATION

关键词:  密封  密封漏泄  热传递  数值仿真

Key words:  Sealing  Seal leakage  Heat transfer  Numerical simulation

摘要:

对刷式封严的流动和换热进行了数值模拟。计算中对结构复杂的刷丝部分采用多孔介质处理，用Ｄａｒｃｙ定律取代动量方程，能量方程采用改进形式，而对其它部分采用简单的矩形网格进行完全Ｎ－Ｓ求解。Ｄａｒｃｙ定律的扩散系数由所提出的实验方法确定。典型的计算结果显示所提方法是正确、合理而可行的。

Abstract:

The fluid flow and heat transfer through a brush seal configuration were numerically simulated.The brush bristles were taken as a porous material and the Darcy law was used instead of the standard momentum equation.For the rest of computational domain,the N S equations in the original forms were applied.A simple experimental method was proposed to obtain the diffusion coefficient of the Darcy law.A typical calculation reveals that the methodology is simple and effective