Automobile Aerodynamic Drag on the Road Compared With Wind Tunnel Tests
Automobile Aerodynamic Drag on the Road Compared With Wind Tunnel Tests
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道路上汽车气动阻力与风洞测试的比较
DOI：
10.4271/810186
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发表时间：
1981
期刊：
影响因子：
--
通讯作者：
A. Visconti
中科院分区：
文献类型：
--
作者：
A. Morelli;P. Nuccio;A. Visconti
进行这项研究的目的是比较在全尺寸风洞中测量的汽车的空气动力阻力与在道路上测量的阻力。预先给出了在道路上和风洞中测量的阻力系数的定义，以便在两种操作条件之间进行比较。三个中型欧洲汽车被选中，一个凹口背式和两个掀背式。道路测试主要基于滑行法。通过对实验结果的统计分析确定总阻力。的理论基础和规范的程序进行了调查和合理的。为了隔离空气动力学阻力，进行了额外的室外和室内试验。风洞试验是在与道路试验完全相同的汽车上进行的，并且在相同的速度范围内进行。风洞试验是在稳定速度下进行的，然而，为了确定减速对气动阻力的影响，还进行了补充的道路试验。最后的结果表明，在风洞中测得的气动阻力系数和在公路上用本文所述的方法测得的气动阻力系数之间只有很小的差别
This investigation was performed with the purpose of comparing the arodynamic drag of an automobile as measured in a full-scale wind tunnel with the drag as measured on the road. A definition of the drag coefficient as measured both on the road and in the wind tunnel is given in advance in order to allow a comparison to be made between the two operating conditions. Three medium size european cars were selected, one notch-back type and two hatch-back types. Road testing was mainly based on the coast-down method. The total resistance was determined by statistical analysis of the experimental results. The theoretical basis and the specifications of the procedure are investigated and justified. Additional outdoor and indoor tests were carried out in order to isolate the aerodynamic drag. The wind tunnel tests were conducted on the same cars fully equipped as tested on the road and in the same speed range. The wind tunnel tests being executed at steady speeds, however, supplementary road tests were performed in order to determine the effect of the deceleration on the aerodynamic drag. The final results show only small differences between the aerodynamic drag coefficients as measured in the wind tunnel and on the road with the procedure here described