竖直矩形毛细微槽群轴向干涸高度的理论分析  

Theoretical analysis of axial dryout point height in vertical rectangular capillary microgrooves

作　　者：胡学功[1] 白莉 王照亮[1] 唐大伟[1] 

机构地区：[1]中国科学院工程热物理研究所,北京100080 [2]内蒙古鄂尔多斯电力冶金股份有限公司,鄂尔多斯016064

出　　处：《中国石油大学学报（自然科学版）》2007年第3期119-123,共5页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：中科院知识创新工程重要方向性项目(KGCX1-SW-12)

摘　　要：对背面有热流输入的开放式竖直矩形毛细微槽群蒸发热沉中液体沿槽道方向的润湿与流动特性进行了理论研究,并提出了预测纯蒸发换热情形下竖直矩形毛细微槽群中液体沿槽道方向的干涸点高度的理论模型。研究结果表明,理论模型的计算结果与实验结果比较吻合;干涸点高度随热负荷的增加而降低,矩形毛细微槽的几何尺寸及微槽群密度对竖直矩形毛细微槽群蒸发热沉中液体的润湿和相变换热特性有重要影响。The axial liquid wetting and flow characteristics in vertical rectangular capillary microgrooves subject to heating from back were studied. A theoretical model for predicting axial liquid dryout point height in the microgrooves was proposed under pure evaporation heat transfer conditions. The calculation results show that the model agrees well with the experimental data and it could explain the mutual influence between wetting behavior and phase-change heat transfer. It is found that the height of dryout point decreases as heat input increases. Geometric parameters of microgrooves and microgroove density have a remarkable effect on wetting （dryout） and phase-change heat transfer in the microgrooves.

关 键 词：毛细微槽群 蒸发换热 干涸点 理论分析 

分 类 号：TK124[动力工程及工程热物理—工程热物理]