Convective Heat Transfer Study with an Array of Air Jets

Q3 Engineering

International Journal of Vehicle Structures and Systems Pub Date : 2023-10-08 DOI:10.4273/ijvss.15.3.04

Niranjan Murthy

引用次数: 0

Abstract

The primary goal of this experimental investigation is to study the effects of various geometrical factors on heat transfer. The tests were performed by changing the heat flux from 0.025 to 0. 2K W/cm^2 and a jet Reynolds number from 2500 to 4500 with a jet exit to target object distance of 10 and 20mm.The test plate is a copper material of size 2mm by 2mm with a negligible thickness, a copper material is taken for its good thermal properties. In all the tested cases it is noticed that as the heat flux surges the plate temperature rise which in turn increase the heat transfer co-efficient. The value of h increases slowly with rise in Reynolds number in all the cases tested. The heat transfer results obtained from this research work is related by means of the simple relationship Nuavg =0.7 q^0.8 Re^0.25.

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射流阵列对流换热研究

本实验研究的主要目的是研究各种几何因素对传热的影响。将热流密度从0.025改变为0进行测试。2K W/cm^2，射流雷诺数从2500到4500，射流出口到目标物体的距离为10和20mm。测试板为2mm × 2mm的铜材料，厚度可忽略不计，铜材料具有良好的热性能。在所有的测试案例中都注意到，随着热流的激增，板的温度升高，这反过来又增加了传热系数。在所有测试情况下，h值随雷诺数的增加而缓慢增加。本研究工作得到的换热结果用简单关系Nuavg =0.7 q^0.8 Re^0.25表示。

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

International Journal of Vehicle Structures and Systems Engineering-Mechanical Engineering

CiteScore

0.90

自引率

0.00%

发文量

期刊介绍： The International Journal of Vehicle Structures and Systems (IJVSS) is a quarterly journal and is published by MechAero Foundation for Technical Research and Education Excellence (MAFTREE), based in Chennai, India. MAFTREE is engaged in promoting the advancement of technical research and education in the field of mechanical, aerospace, automotive and its related branches of engineering, science, and technology. IJVSS disseminates high quality original research and review papers, case studies, technical notes and book reviews. All published papers in this journal will have undergone rigorous peer review. IJVSS was founded in 2009. IJVSS is available in Print (ISSN 0975-3060) and Online (ISSN 0975-3540) versions. The prime focus of the IJVSS is given to the subjects of modelling, analysis, design, simulation, optimization and testing of structures and systems of the following: 1. Automotive vehicle including scooter, auto, car, motor sport and racing vehicles, 2. Truck, trailer and heavy vehicles for road transport, 3. Rail, bus, tram, emerging transit and hybrid vehicle, 4. Terrain vehicle, armoured vehicle, construction vehicle and Unmanned Ground Vehicle, 5. Aircraft, launch vehicle, missile, airship, spacecraft, space exploration vehicle, 6. Unmanned Aerial Vehicle, Micro Aerial Vehicle, 7. Marine vehicle, ship and yachts and under water vehicles.