{"title":"Simulation of Heat Transfer during Injection of Annular Gas-Droplet Jet into Turbulent Cross-Flow","authors":"M. A. Pakhomov","doi":"10.1134/S1810232824040106","DOIUrl":null,"url":null,"abstract":"<p>A numerical analysis of the flow structure and thermal efficiency of a gas-droplet jet injected through a radial annular slot into a single-phase air cross-flow has been performed. The calculations were carried out via the axisymmetric RANS approach for the following range of the main parameters of a two-phase flow: the initial size of water droplets <span>\\(d_{1}=0\\)</span>–20 <span>\\(\\mu\\)</span>m and their mass concentration <span>\\(M_{L1}= 0{–}0.1\\)</span>. Gas turbulence was described in a model of transfer of the Reynolds stress components for a two-phase flow. Because of the presence of evaporating liquid droplets, even at relatively small mass concentrations not exceeding 5% of the mass of the secondary flow, the thermal efficiency during transverse injection could more than double compared to the injection of a single-phase radial jet.</p>","PeriodicalId":627,"journal":{"name":"Journal of Engineering Thermophysics","volume":"33 4","pages":"792 - 803"},"PeriodicalIF":1.3000,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Engineering Thermophysics","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1134/S1810232824040106","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
引用次数: 0
Abstract
A numerical analysis of the flow structure and thermal efficiency of a gas-droplet jet injected through a radial annular slot into a single-phase air cross-flow has been performed. The calculations were carried out via the axisymmetric RANS approach for the following range of the main parameters of a two-phase flow: the initial size of water droplets \(d_{1}=0\)–20 \(\mu\)m and their mass concentration \(M_{L1}= 0{–}0.1\). Gas turbulence was described in a model of transfer of the Reynolds stress components for a two-phase flow. Because of the presence of evaporating liquid droplets, even at relatively small mass concentrations not exceeding 5% of the mass of the secondary flow, the thermal efficiency during transverse injection could more than double compared to the injection of a single-phase radial jet.
对经径向环空槽注入单相空气交叉流的气滴射流的流动结构和热效率进行了数值分析。通过轴对称RANS方法计算了两相流的主要参数范围：水滴的初始尺寸\(d_{1}=0\) -20 \(\mu\) m及其质量浓度\(M_{L1}= 0{–}0.1\)。用两相流的雷诺应力分量传递模型描述了气体湍流。因为存在蒸发的液滴，即使在相对较小的质量浓度不超过5% of the mass of the secondary flow, the thermal efficiency during transverse injection could more than double compared to the injection of a single-phase radial jet.
期刊介绍：
Journal of Engineering Thermophysics is an international peer reviewed journal that publishes original articles. The journal welcomes original articles on thermophysics from all countries in the English language. The journal focuses on experimental work, theory, analysis, and computational studies for better understanding of engineering and environmental aspects of thermophysics. The editorial board encourages the authors to submit papers with emphasis on new scientific aspects in experimental and visualization techniques, mathematical models of thermophysical process, energy, and environmental applications. Journal of Engineering Thermophysics covers all subject matter related to thermophysics, including heat and mass transfer, multiphase flow, conduction, radiation, combustion, thermo-gas dynamics, rarefied gas flow, environmental protection in power engineering, and many others.
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