摘要
引言
板翅式换热器是热力过程的关键设备,广泛应用于能源、动力、化工、冶金等领域[1],在一般的板翅式换热器换热和流阻分析中,都认为流体在板束中均匀分配,但实际上,由于板翅式换热器人口结构设计不当,是很难做到均匀分配的[2].
A fluid flow model of distributor was set up to investigate the effectof distributor configuration on the fluid flow distribution in plate- fin heat exchanger. At the same time, a mathematical equation was developed to generate different types of fluid flow maldistribution models considering the possible deviations in fluid flow. Using these fluid flow models, the fluid flow distributions in plate- fin beat exchanger were calculated for different configurations and operating conditions. The computational results show that nonuniform inlet velocity, inlet angle, and orifice diameter on the fin are the main factors affecting the distribution performance of distributor. The fluid flow distribution in plate- fin heat exchanger can be effectively improved by changing the distributor configuration. The distributor reaches the best distribution performance when the orifice diameter is 2 mm. The computational results are in good agreement with experimental ones.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2002年第12期1311-1314,共4页
CIESC Journal
基金
全国首届优秀博士学位论文作者专项基金资助项目(No.199933).
