低质量流速下环形通道内干涸后传热实验研究  

Experimental Investigation on Post-Dryout Heat Transfer in Narrow Annuli at Low Mass Velocity

作　　者：李志辉[1] 吴埃敏[1] 贾斗南[1] 秋穗正[1] 聂常华 

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,西安710049 [2]空泡物理与自然循环国家重点实验室,成都610041

出　　处：《西安交通大学学报》2004年第7期698-701,共4页Journal of Xi'an Jiaotong University

基　　金：空泡物理与自然循环国家重点实验室基金资助项目 ;西安交通大学多相流国家重点实验室基金资助项目 (50 3 2 3 0 0 1 ).

摘　　要：对以水为工质在中压(1 5～6 0MPa)、低质量流速(52 89～84 20kg/(m2·s))下的双面加热环形通道内的流动沸腾干涸后传热进行了实验研究.由实验数据与通用的经验公式进行比较,发现这些关系式适合于中高压、高质量流速工况,而对低压、低质量流速工况存在较大的偏差.考虑了蒸汽物性参数和壁面温度对换热的影响,在Groeneveld公式形式的基础上,引入Polomik公式中壁面温度和饱和温度比值关系的修正因子,分析了影响壁面温度的热流密度、压力和质量流速等因素,得出了一个适合中压、低质量流速下新的干涸后传热计算关系式.该关系式与实验数据吻合较好.Post-dryout boiling heat transfer with deionized water flowing through narrow annular channel under the conditions of medium pressure (1.5-6.0 MPa) and low mass velocity (52.89-84.20 kg/(m2&middots)) was investigated experimentally. Compared the experimental data with well-known empirical correlations, it is found that these correlations are appropriate for the situations of medium-high pressure and high mass velocity and deviate seriously in low-medium pressure and low mass velocity cases. Considering the effect of property parameter of the vapor and wall temperature on heat transfer was considered and based on the Groeneveld equation, a modified factor of the ratio of wall temperature to saturated temperature was introduced. The influences of heat flux, mass velocity, and pressure on wall temperature were analyzed, and a new correlation for post-dryout heat transfer of medium pressure and low mass velocity conditions was developed, which correlates the experimental data quite well.

关 键 词：环形通道 干涸后传热 壁面温度 低质量流速 

分 类 号：TK214[动力工程及工程热物理—动力机械及工程]