Jet Impingement Heat Transfer on Heated Block by Using Different Nozzle Arrangements

IF 1.1 4区工程技术 Q3 CHEMISTRY, ORGANIC

Petroleum Chemistry Pub Date : 2025-07-18 DOI:10.1134/S0965544125040073

Rafid Abdulrazaq Jabr, Kadhum Audaa Jehhef, Salah H. Abid Aun

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Abstract

The current paper presents to study effect of consuming a direct slot jet inside a square channel to increase the heat transfer convection in a channel prepared with a heated block and slot jet with different nozzle arrangements. In numerical solution, to construct a two-dimensional domain for simulation, the SOLIDWORKS 2018 software was used, and the numerical tool (ANSYS Fluent Workbench 2020 R2) is employed. The study included the effects of the following parameters such as slot Nozzle opening d = 3, 4, and 5 mm, slot Nozzle distance to opening ratio x/d = 2, 4 and 8, slot Nozzle velocity v_j = 1, 2, 4 m/s, Heat flux q′′ = 1000 W/m², Duct inlet velocity u = 1 m/s, slot Nozzle hit h = 3.5 cm and slot nozzle types flat, converge, diverges. The present numerical study uses a computational domain of a square duct with a length of 90 cm and a side dimension of 20 cm, which is used for air passage. The main airflow from the surroundings entered the channel inlet to achieve a fully developed flow is about 42.5 cm. The results showed that using the convergent nozzle, which increased in Nu by 73% compared to that of the divergent nozzle, and the enhancement of Nu is 77% associated with that of the flat nozzle when using the convergent Nozzle at x_j = 6 mm and d_j = 3 mm.

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不同喷嘴布置对受热块射流冲击传热的影响

本文研究了在由加热块和不同喷嘴布置的槽射流组成的方形通道内消耗直接槽射流以增加换热对流的效果。在数值解中，采用SOLIDWORKS 2018软件，采用ANSYS Fluent Workbench 2020 R2数值工具构建二维域进行仿真。研究了槽口开度d = 3,4,5 mm，槽口距开度比x/d = 2,4和8，槽口速度vj = 1,2,4 m/s，热流密度q " = 1000 W/m2，风道进口速度u = 1 m/s，槽口撞击h = 3.5 cm，槽口类型平坦、收敛、发散等参数对槽口的影响。本数值研究的计算域为长90 cm、边宽20 cm的方形风管，用于空气通道。来自周围环境的主要气流进入通道入口，达到充分发展的流量约为42.5 cm。结果表明，在xj = 6 mm和dj = 3 mm处，采用会聚型喷嘴时，Nu值比采用发散型喷嘴时提高了73%，而采用会聚型喷嘴时，Nu值比采用扁平型喷嘴时提高了77%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Petroleum Chemistry 工程技术-工程：化工

CiteScore

2.50

自引率

21.40%

发文量

102

审稿时长

6-12 weeks

期刊介绍： Petroleum Chemistry (Neftekhimiya), founded in 1961, offers original papers on and reviews of theoretical and experimental studies concerned with current problems of petroleum chemistry and processing such as chemical composition of crude oils and natural gas liquids; petroleum refining (cracking, hydrocracking, and catalytic reforming); catalysts for petrochemical processes (hydrogenation, isomerization, oxidation, hydroformylation, etc.); activation and catalytic transformation of hydrocarbons and other components of petroleum, natural gas, and other complex organic mixtures; new petrochemicals including lubricants and additives; environmental problems; and information on scientific meetings relevant to these areas. Petroleum Chemistry publishes articles on these topics from members of the scientific community of the former Soviet Union.