基于凹坑型非光滑结构的车身气动减阻优化方法研究

杨易; 许亮; 聂云; 徐永康

doi:10.13433/j.cnki.1003-8728.2015.1223

基于凹坑型非光滑结构的车身气动减阻优化方法研究

doi: 10.13433/j.cnki.1003-8728.2015.1223

1.
湖南大学汽车车身先进设计制造国家重点实验室, 长沙 410082

基金项目:

国家自然科学基金项目(51375155)与湖南省自然科学基金项目(13JJ3041)资助

详细信息

作者简介:
杨易(1972-),副教授,硕士生导师,研究方向为汽车空气动力学汽车电子等,hnyy66@163.com

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- 文章访问数: 175
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- PDF下载量: 8
- 被引次数: 0
出版历程
- 收稿日期: 2014-02-21
- 刊出日期: 2015-12-05

Optimizing Strategy on Car Body Aerodynamic Drag Reduction Based on Pit-type Non-smooth Structure

1.
State Key Laboratory of Advanced Design and Manufacturing of Automotive Body, Hunan University, Changsha 410082, China

摘要

摘要: 采用了梯度优化法和全局优化法对凹坑型非光滑单元进行优化设计,寻求非光滑单元对汽车的最佳气动减阻效果。将凹坑型非光滑结构布置在某款集装箱货车模型的不同位置,比较减阻效果差异,确定了模型的有效减阻位置。以凹坑单元体开口直径、深度、纵向间距、横向间距为设计变量,分别采用梯度优化法和全局优化法优化凹坑型非光滑结构,比较了两种方法的差异。结果表明:梯度优化法可以快速得到适用于工程实际的优化方案;全局优化法考虑到了变量的耦合因素,优化结果更加全面、准确;经过优化,凹坑型非光滑结构可有效减小气动阻力达10.44%。
- 非光滑单元 /
- 气动减阻 /
- 设计变量 /
- 优化
Abstract: This paper uses gradient optimization method and global optimization method to optimize the design of the pit-type non-smooth unit, seeking the best drag reduction effect on the car body by adding non-smooth structures. The pit-type non-smooth structure is arranged on different locations of a container truck model, the difference in drag reduction effect is compared to determine the effective drag reduction position of the model. The pit-type non-smooth structure's design variables of aperture diameter, depth, vertical spacing, and horizontal spacing were optimized using the gradient method and the global optimization method respectively; the differences between the two methods were compared. The results and their discussion show preliminarily that: the gradient method can quickly obtain optimization program for practical engineering; global optimization method takes the variable coupling factor into account and its optimization results are more comprehensive and accurate; after optimization, pit-type non-smooth structure can effectively reduce the aerodynamic drag up to 10.44%.
- aerodynamic drag /
- automobiles /
- boundary conditions /
- calculations

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参考文献(14)

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