Passive Drag Reduction of the Square Back Truck Body

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
A. Omar, Alaman Altaf, Waqar Asar
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引用次数: 2

Abstract

Drag is one of the most significant factors that increase fuel consumption, followed by operating cost of the vehicle. Square-back road vehicles like trucks and buses are common and popular means of transport across the globe. In this background, it is of great research value to reduce the drag on vehicles, improve their fuel efficiency and reduce their operational cost. In this work, a simplified model of a truck was considered, and its drag was reduced by modifying its geometry using passive drag reduction devices. The passive devices used in this study were backward-facing step, fins, splitter plates/tabs, dimple, vents, and channels. These devices, of different sizes and configurations, were numerically studied using CFD software Star CCM+ at a Reynolds number of 2.4127×10^6. Drag reduction up to 9.9% was achieved, when backward-facing step was placed at the bottom rear edge of the truck. Further, multiple circular channels used on the truck’s sides reduced the drag up to 6.5%, while multiple rectangular channels on the sides of the truck achieved 5.1% drag reduction. The maximum drag reduction of the fins was found to be 4.6%. In spite of these, no significant drag reduction was observed when using splitter plates/tabs, dimple and vents.
方形后车体的被动减阻
阻力是增加燃油消耗的最重要因素之一,其次是车辆的运行成本。像卡车和公共汽车这样的方形道路车辆在全球范围内是常见和流行的交通工具。在此背景下,如何减小汽车的阻力,提高汽车的燃油效率,降低汽车的运行成本具有重要的研究价值。本文考虑了一种简化的卡车模型,并通过使用被动减阻装置修改其几何形状来减小其阻力。本研究中使用的无源装置有后向台阶、翅片、分流板/片、凹槽、通风口和通道。在雷诺数为2.4127×10^6的条件下,使用CFD软件Star CCM+对不同尺寸和结构的这些装置进行了数值研究。当在卡车的底部后边缘放置后向台阶时,阻力减少了9.9%。此外,卡车侧面的多个圆形通道减少了6.5%的阻力,而卡车侧面的多个矩形通道减少了5.1%的阻力。尾翼的最大减阻率为4.6%。尽管如此,当使用分流板/卡片、凹槽和通风口时,并没有观察到明显的阻力减少。
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
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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