热防护系统中六角蜂窝腔内的流动换热研究

被引：8

作者：

董葳

范绪箕

机构：

[1] 上海交通大学机械与动力工程学院

来源：

空气动力学学报 | 2005年 / 04期

关键词：

六角蜂窝; 自然对流; 数值计算; 换热;

D O I：

暂无

中图分类号：

TK124 [传热学];

学科分类号：

摘要：

通过对六角蜂窝腔内的流动换热进行数值模拟研究,得到了Ra数从500到105范围内侧壁绝热时蜂窝腔内空气的流动换热结果和机理,六角蜂窝的倾斜角度为0°、10°2、0°、30°及45°,六角蜂窝的长高比H/L=0.75。数值计算方法采用有限体积的SIMPLEC算法,对流项采用二阶迎风格式进行离散,计算中考虑蜂窝腔内空气的物性变化。计算结果表明,在所计算的问题中如果采用Boussinesq假设将使得计算结果误差比较大。六角蜂窝腔内的空气流动换热机理的研究,对热防护系统设计具有指导意义。

引用

页码：496 / 500

页数：5

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