摘要：To further extend knowledge about the detailed knowledge on the crossflow characteristics in a multi-jets system under a confined space,particle image velocimetry(PIV)was employed to investigate the flow structures together with the distributions of the mean velocity components for Reynolds numbers(Re)ranging from 6 213 to 13 418,nozzle-to-plate spacing(H/D)varying from 0.20 to 1.25,respectively.Results show that the crossflow configuration is significantly different from those of large nozzle-to-plate spacing.In addition,a turning point H/D=0.50 is revealed in the profile of the normalized maximum radial velocity which is associated with the heat transfer distribution on the impingement plate.

关键词：crossflow multiple impinging jets small 

单位：Jiangsu; Collaborative; Innovation; Center; for; Photovoltaic; Science; and; Engineering; Jiangsu; Province; Cultivation; Base; for; State; Key; Laboratory; of; Photovoltaic; Science; and; Technology; Jiangsu; Key; Laboratory; of; Green; Process; Equipment; Changzhou; High; Technology; Research; Key; Laboratory; of; Mould; Advanced; Manufacturing; School; of; Mechanical; Engineering; Changzhou; University; Changzhou; Jiangsu; 213164; China; Micro/Nano; Science; and; Technology; Center; School; of; Mechanical; Engineering; Jiangsu; University; Zhenjiang; Jiangsu; 212013; China