汽轮发电机气体冷却器性能试验研究

气体冷却器是汽轮发电机的重要设备之一。其传热与阻力性能将直接影响汽轮发电机的运行经济性和可靠性。为实现汽轮发电机气体冷却器的优化设计,对不同翅片间距的翅片管冷却器的传热和阻力性能进行了试验研究,得到了Re在3 000~190 000之间换热器翅片侧的传热和阻力特性,并分析了风速和翅片间距对气体冷却器传热和阻力性能的影响规律。研究成果对汽轮发电机气体冷却器的结构与性能优化具有重要的指导作用。

Experimental study on heat transfer and friction characteristics of gas coolers on steam turbo-generators

The gas cooler is one of the important components on the turbo-generators,and its heat transfer and friction characteristics will affect the economy and reliability of operation of turbo-generators.For the purpose of optimizing design,three plain fin-and-tube heat exchangers with different fin pitch were experimentally studied.Based on the experimental study,air-side heat transfer and friction characteristics of the tested heat exchangers were investigated.Moreover,the influences of air velocity and fin pit...