Heat transfer and flow resistance in a notched crossed-rib channel
-
摘要: 对一种特殊结构的涡轮叶片内冷通道——开槽交错肋通道进行了换热和流阻的测量实验.全部的实验都在静止的状态下完成,其中换热实验采用了水蒸气凝结换热方案.实验的 Re数范围从5 000~45 000,得到了大量关于开槽交错肋涡轮叶片内冷通道的实验数据,并将结果与不开槽交错肋通道作出对比,得出一定槽宽的开槽交错肋通道相比于相同尺寸的不开槽交错肋通道,换热效果有了明显的提高,而流阻系数相应有所减小,所以整体换热效果优于不开槽通道.此外,对于不同槽宽通道的各项特性也进行了实验对比.得出 4 mm开槽交错肋通道的换热效果最好,接下来依次是2 mm、6 mm和8mm的通道.Abstract: The investigation of heat transfer, flow resistance and the pressure across the channel in turbulator cooling channel with a special crossed-rib channel which has slots was studied experimentally, then got amount of experimental results. All experiments were made in stillness states. The method of vapor concreting heat transfer was adopted for the heat transfer experiments. The experiment was conducted in the range of Reynolds number from 5 000 to 45 000. Compared with the channels which are no slots, the same dimensions ones with slots have more significant effects on the whole heat transfer enhancement. Besides, the experimental comparisons of characteristics were made to the different slots width channels. For the channels of different slots width, the heat transfer effects of 4 mm slot width channel are best, the following are 2 mm, 6 mm and 8 mm in turn.
-
Key words:
- flow of fluids /
- slotting /
- heat transfer /
- friction
-
[1] 秦岭.交错肋通道换热和流阻特性的实验研究 .北京:北京航空航天大学能源与动力工程学院,2006 Qin Ling. Experiment investigation of heat transfer and flow resistance in a crossed-rib channel . Beijing: School Jet Propulsion, Beijing University of Aeronautics and Astronantics , 2006(in Chinese) [2] 曹玉璋,邱绪光.实验传热学[M].北京:国防工业出版社,1998 Cao Yuzhang, Qiu Xuguang. Experimental heat transfer[M]. Beijing: National Defense Industry Press, 1998(in Chinese) [3] Han J C, Zhang Y M. Augmented heat transfer in square channels with parallel, crossed, and v-shaped angled ribs [J]. ASME Journal of Heat Transfer, 1991,113(3): 590-596 [4] 马重芳,张玉明,顾维藻,等.强化换热[M].北京:科学出版社,1990 Ma Chongfang, Zhang Yuming, Gu Weizao, et al. Enhanced heat transfer[M]. Beijing: Science Press, 1990(in Chinese) [5] Bunker R S. Latticework (vortex) cooling effectiveness[J]. Journal of Turbo-machinery, 2004,127(3):471-478 [6] Won S Y, Ligrani P M. Comparisons of flow structure and local Nusselt numbersin channels with parallel-and crossed-rib turbulators[J]. Journal of Heat and Mass Transfer, 2004,47(9): 1573-1586. -
点击查看大图
计量
- 文章访问数: 2954
- HTML全文浏览量: 66
- PDF下载量: 883
- 被引次数: 0
下载:
