螺旋管内高压汽水两相流传热恶化规律的研究

STUDY ON CRITICAL HEAT FLUX OF STEAM-WATER TWO-PHASE FLOW IN HELICAL COIL TUBES

报导了在西安交通大学高压汽水实验回路上进行的垂直螺旋管内汽水两相流传热试验研究．试验得出了沿螺旋管长度方向及圆周方向的壁温分布特性，由此确定了发生传热恶化的临界干度及其位置．在试验数据的基础上，得到了计算临界干度的经验公式，为螺旋管圈换热设备的设计提供了必要的依据．

Extensive experiments of steam-water two-phase flow and boiling heat transfer in a vertical helically-coiled tube were carried out in high pressure water test loop of Xi' an JiaotongUniversity. Wall temperature profiles along the tube length and around the tube perimeterwere recorded. Based on these data, the critical qualities of CHF were obtained. A correlation for predicting critical quality was derived. It is in good agreement with the experimentaldata, and therefore can be recommended to be used for the design of heat transfer deviceswith belieal coils.