缝隙冲击射流淬火对流换热的影响因素

采用有限元方法对非淹没缝隙射流冲击区单相对流换热进行数值模拟.结合辊式淬火冷却的特点,分析了缝隙射流冲击区对流换热的影响因素如射流速度、射流出口距冲击板的距离(高度)、喷嘴宽度、射流出口速度方向与冲击板之间的夹角、水温等.结果表明:在淬火100 mm厚钢板时,经济实用的工艺参数为射流速度40～45 m.s-1,射流出口距冲击板的距离(高度)20 mm,喷嘴宽度2 mm,射流出口速度方向与冲击板之间夹角45°,水温10～35℃.

Influencing factors on convective heat transfer of impinging slot jet for quenching

Numerical simulation was performed to study single-phase convective heat transfer at the impinging zone of non-immersed slot jet by a finite element method(FEM).In combination with the characteristic of rolled quenching machines,some influencing factors on heat transfer such as jet velocity,nozzle-to-impinging plate spacing(height),slot width,jet direction-to-plate angle,and the temperature of water(liquid) from the slot nozzle were analyzed and designed.The results show that,for quenching plates of 100 mm ...