{"title":"Conjugate heat transfer analysis of mist-assisted film cooling of a mini-channel embedded flat plate","authors":"","doi":"10.1016/j.icheatmasstransfer.2024.108204","DOIUrl":null,"url":null,"abstract":"<div><div>This article presents a three-dimensional conjugate heat transfer analysis for mist-assisted air film cooling applied to a flat plate. In this computational fluid dynamics (CFD) investigation, a flat plate with 11 film holes served as the baseline configuration. A mini-channel was integrated into the plate wall to investigate the influence of a mini-channel on cooling performance. Steady-state simulations were conducted at a constant blowing ratio <span><math><mi>M</mi><mo>=</mo><mn>0.5</mn></math></span>, with dry air serving as the coolant and mist concentrations ranging from 2 % to 6 %. The study revealed that mist-assisted film cooling outperforms air film cooling for both the flat plate with only film cooling (FC) and the plate with impingement mini-channel film cooling (IMFC). Notably, both air and mist-assisted cooling exhibited similar qualitative trends. For droplet size of <span><math><mn>5</mn><mspace></mspace><mi>μm</mi></math></span>, the area-weighted average effectiveness of the IMFC plate showed an improvement of ∼112 % compared to the FC plate with air cooling. Additionally, it was discovered that cooling performance increased with higher mist concentrations; for 6 % mist concentration (by mass), the area-weighted effectiveness was enhanced by ∼177 % for the FC plate.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":null,"pages":null},"PeriodicalIF":6.4000,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Communications in Heat and Mass Transfer","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0735193324009667","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MECHANICS","Score":null,"Total":0}
引用次数: 0
Abstract
This article presents a three-dimensional conjugate heat transfer analysis for mist-assisted air film cooling applied to a flat plate. In this computational fluid dynamics (CFD) investigation, a flat plate with 11 film holes served as the baseline configuration. A mini-channel was integrated into the plate wall to investigate the influence of a mini-channel on cooling performance. Steady-state simulations were conducted at a constant blowing ratio , with dry air serving as the coolant and mist concentrations ranging from 2 % to 6 %. The study revealed that mist-assisted film cooling outperforms air film cooling for both the flat plate with only film cooling (FC) and the plate with impingement mini-channel film cooling (IMFC). Notably, both air and mist-assisted cooling exhibited similar qualitative trends. For droplet size of , the area-weighted average effectiveness of the IMFC plate showed an improvement of ∼112 % compared to the FC plate with air cooling. Additionally, it was discovered that cooling performance increased with higher mist concentrations; for 6 % mist concentration (by mass), the area-weighted effectiveness was enhanced by ∼177 % for the FC plate.
期刊介绍:
International Communications in Heat and Mass Transfer serves as a world forum for the rapid dissemination of new ideas, new measurement techniques, preliminary findings of ongoing investigations, discussions, and criticisms in the field of heat and mass transfer. Two types of manuscript will be considered for publication: communications (short reports of new work or discussions of work which has already been published) and summaries (abstracts of reports, theses or manuscripts which are too long for publication in full). Together with its companion publication, International Journal of Heat and Mass Transfer, with which it shares the same Board of Editors, this journal is read by research workers and engineers throughout the world.