冷却介质在层板内流动特性研究(第二部分 数值模拟复杂结构内流场)

An investigation of coolant flow performance within laminated plate (Ⅱ Numerical simulation of flow field of complex structure)

用商业软件模拟复杂层板中冷却介质流动特性,以粒子图像速度(PIV)测量技术获得的实验数据,验证所选择的数学模型和数值方法。实验是在确定的径高比1及入口雷诺数4.1×104下进行的。用验证的数学模型及数值方法,向上下扩展雷诺数至2.05×104及8.2×104,改变层板径高比至0.5及2.0,模拟这两个参数变化对层板内冷却介质流场的影响。模拟结果指出:在相同的径高比下,入口雷诺数的改变对层板内冷却介质流动特性影响很小;相反在相同的入口雷诺数下,径高比改变对层板内冷却介质流动特性有明显的影响。

The fluid flow performance within a laminated plate was invetsigtaed through a commercial software. The mathematical model and numerical method is validated using the experimental data obtained by PIV meaurement technique. The experiment was carried out at a given inlet Reynolds number of 4.1 ×10^4 and a ratio of height to diameter of 1. The numerical simulation of the influence of the Reynolds number and ratio of height to diameter on the flow performance was conducted by the validated mathematical model and simulation method, and the Reynold number is extended from 2.05 ×10^4 to 8.2 ×10^4, the ratio of height to diameter from 0.5 to 2.0. It is drawn through the numerical simulation that at the same ratio of height to diameter, the influence of the Reynolds number on the flow performance is not sensitive, contrarily at the same Reynolds number, a change in the ratio of height to diameter will result in a notable variation of coolant flow performance within the laminated plate.