Effect Of Rib Blockage Ratio And Arrangements On Impingement Heat Transfer In Double-Wall Cooling

IF 1.9 4区工程技术 Q2 ENGINEERING, MECHANICAL

Journal of Heat Transfer-transactions of The Asme Pub Date : 2023-05-18 DOI:10.1115/1.4062566

D. Kong, Zhenyuan Ma, Wei Li, Tao Guo, Cun-liang Liu

{"title":"Effect Of Rib Blockage Ratio And Arrangements On Impingement Heat Transfer In Double-Wall Cooling","authors":"D. Kong, Zhenyuan Ma, Wei Li, Tao Guo, Cun-liang Liu","doi":"10.1115/1.4062566","DOIUrl":null,"url":null,"abstract":"\n A numerical study was conducted on the multiple jet impingement heat transfer of the double-wall cooling with high blockage ratio ribs of various configurations. Three different blockage ratios (BR = 0.2, 0.3, and 0.5) and two rib arrangements relative to the effusion holes (l/Sx = 0.25 and 0.75) were thoroughly examined using the RANS method with the SST-KIC turbulence model, considering the Kato-Launder modification, intermittency and crossflow transition effects. The ratio of jet-to-target plate spacing to jet diameter (H/d) was fixed to be 1, and Reynolds numbers varied in the range of 4,000-16,000. Furthermore, the computed data on the rib roughed wall were also compared with those on a flat plate for the double-wall cooling. The results demonstrate that the installation of the high blockage ribs significantly decreases the detrimental crossflow effect due to the blockage effect of the ribs and intensively disturbs the jet flow in flow passing over the ribs, thereby enhancing the heat transfer performance. For the impingement/effusion cooling, the arrangement of the rib downstream of the effusion holes (l/Sx = 0.25) shows more advantages, and the heat transfer level rises quickly as BR increases. The best thermal-hydraulic performance and heat transfer uniformity on the rib roughed target plate are both obtained at BR = 0.3, which can be increased by up to 10% and 8%, respectively, compared to those on the flat plate.","PeriodicalId":15937,"journal":{"name":"Journal of Heat Transfer-transactions of The Asme","volume":"27 1","pages":""},"PeriodicalIF":1.9000,"publicationDate":"2023-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Heat Transfer-transactions of The Asme","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1115/1.4062566","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}

引用次数: 0

Abstract

A numerical study was conducted on the multiple jet impingement heat transfer of the double-wall cooling with high blockage ratio ribs of various configurations. Three different blockage ratios (BR = 0.2, 0.3, and 0.5) and two rib arrangements relative to the effusion holes (l/Sx = 0.25 and 0.75) were thoroughly examined using the RANS method with the SST-KIC turbulence model, considering the Kato-Launder modification, intermittency and crossflow transition effects. The ratio of jet-to-target plate spacing to jet diameter (H/d) was fixed to be 1, and Reynolds numbers varied in the range of 4,000-16,000. Furthermore, the computed data on the rib roughed wall were also compared with those on a flat plate for the double-wall cooling. The results demonstrate that the installation of the high blockage ribs significantly decreases the detrimental crossflow effect due to the blockage effect of the ribs and intensively disturbs the jet flow in flow passing over the ribs, thereby enhancing the heat transfer performance. For the impingement/effusion cooling, the arrangement of the rib downstream of the effusion holes (l/Sx = 0.25) shows more advantages, and the heat transfer level rises quickly as BR increases. The best thermal-hydraulic performance and heat transfer uniformity on the rib roughed target plate are both obtained at BR = 0.3, which can be increased by up to 10% and 8%, respectively, compared to those on the flat plate.

查看原文本刊更多论文

肋堵比及布置对双壁冷却冲击换热的影响

对不同构型高堵塞比肋板双壁冷却的多射流冲击换热进行了数值研究。采用RANS方法，结合SST-KIC湍流模型，考虑Kato-Launder修正、间断性和横流过渡效应，对三种不同堵塞比(BR = 0.2、0.3和0.5)和两种相对于积液孔的肋条布置(l/Sx = 0.25和0.75)进行了全面研究。射流与靶板间距与射流直径之比(H/d)固定为1，雷诺数在4000 ~ 16000范围内变化。此外，还对肋粗壁与平板双壁冷却的计算结果进行了比较。结果表明:高阻肋的安装显著降低了高阻肋的阻流效应，强烈地干扰了经过高阻肋的射流，从而提高了传热性能。对于冲击/积液冷却，肋板布置在积液孔下游(l/Sx = 0.25)更具优势，且传热水平随着BR的增加而迅速上升。肋粗靶板的热工性能和换热均匀性在BR = 0.3时达到最佳，比平板分别提高了10%和8%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of Heat Transfer-transactions of The Asme 工程技术-工程：机械

自引率

0.00%

发文量

182

审稿时长

4.7 months

期刊介绍： Topical areas including, but not limited to: Biological heat and mass transfer; Combustion and reactive flows; Conduction; Electronic and photonic cooling; Evaporation, boiling, and condensation; Experimental techniques; Forced convection; Heat exchanger fundamentals; Heat transfer enhancement; Combined heat and mass transfer; Heat transfer in manufacturing; Jets, wakes, and impingement cooling; Melting and solidification; Microscale and nanoscale heat and mass transfer; Natural and mixed convection; Porous media; Radiative heat transfer; Thermal systems; Two-phase flow and heat transfer. Such topical areas may be seen in: Aerospace; The environment; Gas turbines; Biotechnology; Electronic and photonic processes and equipment; Energy systems, Fire and combustion, heat pipes, manufacturing and materials processing, low temperature and arctic region heat transfer; Refrigeration and air conditioning; Homeland security systems; Multi-phase processes; Microscale and nanoscale devices and processes.