摘要
在雷诺数Re为8900~9900的范围内,通过数值模拟方法对安装有相同迎流截面积的圆形楞、矩形楞和三角楞等5种涡流发生器的矩形通道进行传热和流阻特性的研究。结果表明:相同Re下,顺直三角楞的强化传热效果最好,传热强度比矩形光通道高40.65%~75.74%。但是相应的其流动阻力也是最大的,比矩形光通道高263.03%~376.04%。当以R=(j/j_0)/(f/f_0)作为综合特性评价标准时,圆形楞的综合换热性能最好,且最多可比顺直三角楞高52.11%。综合考虑,可以认为圆形楞涡流发生器是一种低阻高效的新型涡流发生器。
Within the scope of the Reynolds paper carried on the research of heat transfer cross-section of circular, rectangle and triangl number Re=8900-29900, through the numerical simulation method, the and flow resistance characteristics to install with the same incident flow e five kinds of vortex generator of rectangular channel. The results showed that： under the same Re number, straight triangle of strengthening heat transfer effect is best, heat transfer intensity is 40.65% to 75.74% higher than rectangular optical channel. But the corresponding the flow resistance is also the largest, about 263.03% to 376.04% higher than rectangular optical channel. When R=（j/j0）/（f/f0） as integrated properties evaluation standard, the comprehensive heat transfer performance of the circular is best, and up to 52.11% higher than straight triangle. Overall consideration, can be assumed that a circular vortex generator is a kind of low flow resistance and high efficient new vortex generator .
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2017年第5期1233-1239,共7页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(51476025)
关键词
涡流发生器
强化传热
流动阻力
综合特性
数值模拟
vortex generator
strengthen heat transfer
flow resistance
integrated properties
numerical simulation
