Article(id=1204386112123937472, tenantId=1146029695717560320, journalId=1189621681917173762, issueId=1204386108021911888, articleNumber=null, orderNo=null, doi=10.19620/j.cnki.1000-3703.20220436, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=null, receivedDateStr=null, revisedDate=1656172800000, revisedDateStr=2022-06-26, acceptedDate=null, acceptedDateStr=null, onlineDate=1765077625542, onlineDateStr=2025-12-07, pubDate=1695484800000, pubDateStr=2023-09-24, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1765077625542, onlineIssueDateStr=2025-12-07, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1765077625542, creator=13701087609, updateTime=1765077625542, updator=13701087609, issue=Issue{id=1204386108021911888, tenantId=1146029695717560320, journalId=1189621681917173762, year='2023', volume='', issue='9', pageStart='1', pageEnd='62', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1765077624563, creator=13701087609, updateTime=1765079263705, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1204392983144673781, tenantId=1146029695717560320, journalId=1189621681917173762, issueId=1204386108021911888, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1204392983144673782, tenantId=1146029695717560320, journalId=1189621681917173762, issueId=1204386108021911888, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=55, endPage=62, ext={EN=ArticleExt(id=1204386112455287496, articleId=1204386112123937472, tenantId=1146029695717560320, journalId=1189621681917173762, language=EN, title=Automotive Aerodynamic Characteristics Optimization Based on Response Surface Model, columnId=null, journalTitle=Automobile Technology, columnName=null, runingTitle=null, highlight=null, articleAbstract=
In order to improve vehicle aerodynamic coefficients comprehensively, this paper proposed a shape optimization design scheme. Firstly, vehicle without crosswind was simulated numerically by using realizable k-ε turbulence model. The reliability of the simulation model was verified by wind tunnel tests. On this basis, the influence of different crosswind angles on the aerodynamic characteristics was studied, the aerodynamic coefficients of yaw angle of 12° were taken as the reference benchmark for optimization, samples were extracted by uniform Latin hypercube for flow field calculation, the response surface model was used to approximate the corresponding relationship between automobile modeling parameters and aerodynamic coefficients, the Pareto front solutions were obtained based on the genetic optimization algorithm. Finally, 4 optimization schemes were determined, which reduced the drag coefficient by 2.6%, the lateral force coefficient by 6.54%, and the lift coefficient tends to be negative, effectively improving the aerodynamic characteristics of the vehicle.
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为综合改善某车型气动力系数,提出一种外形优化设计方案。首先采用Realizable k-ε湍流模型对汽车无侧风工况进行数值模拟,并结合风洞试验验证了仿真模型的可靠性。在此基础上,研究不同侧风角对汽车气动特性的影响,并以横摆角12°时的气动力系数为优化参考基准,通过均匀拉丁超立方抽取样本进行流场计算,应用响应面模型近似汽车造型参数与气动力系数的对应关系,基于遗传算法得到Pareto前沿解。最终确定了4种优化方案,最大分别使阻力系数降低2.6%、侧力系数降低6.54%、升力系数趋于负值,有效改善了汽车的气动特性。
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| 边界名 | 边界类型 | 取值 |
| 计算域入口 | 速度入口 | 120 km/h |
| 计算域出口 | 压力出口 | 0 |
| 计算域壁面 | 壁面 | |
| 车前地面 | 壁面 | 无滑移 |
| 车后地面 | 壁面 | 滑移 |
| 车身 | 壁面 | |
| 车轮 | 旋转壁面 | 976.8 r/min |
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| 边界名 | 边界类型 | 取值 |
| 计算域入口 | 速度入口 | 120 km/h |
| 计算域出口 | 压力出口 | 0 |
| 计算域壁面 | 壁面 | |
| 车前地面 | 壁面 | 无滑移 |
| 车后地面 | 壁面 | 滑移 |
| 车身 | 壁面 | |
| 车轮 | 旋转壁面 | 976.8 r/min |
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| 序号 | 车速 /km·h-1 | 格栅状态 | 路面模拟 | 气动阻力系数试验结果 |
| 1 | 120 | 开启 | 有 | 0.330 |
| 2 | 120 | 开启 | 无 | 0.332 |
| 3 | 140 | 开启 | 有 | 0.330 |
| 4 | 140 | 开启 | 无 | 0.332 |
| 5 | 120 | 封闭 | 有 | 0.304 |
| 6 | 120 | 封闭 | 无 | 0.310 |
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试验结果
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| 序号 | 车速 /km·h-1 | 格栅状态 | 路面模拟 | 气动阻力系数试验结果 |
| 1 | 120 | 开启 | 有 | 0.330 |
| 2 | 120 | 开启 | 无 | 0.332 |
| 3 | 140 | 开启 | 有 | 0.330 |
| 4 | 140 | 开启 | 无 | 0.332 |
| 5 | 120 | 封闭 | 有 | 0.304 |
| 6 | 120 | 封闭 | 无 | 0.310 |
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| 横摆角/(°) | 车速/km·h-1 | 侧风速度/km·h-1 | 合成速度/km·h-1 |
| 0 | 120 | 0 | 120 |
| ±3 | 120 | 6.288 9 | 120.164 7 |
| ±6 | 120 | 12.612 5 | 120.661 0 |
| 9 | 120 | 19.006 1 | 122.495 8 |
| 12 | 120 | 25.506 8 | 122.680 9 |
| 15 | 120 | 32.153 9 | 124.233 1 |
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侧风工况
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| 横摆角/(°) | 车速/km·h-1 | 侧风速度/km·h-1 | 合成速度/km·h-1 |
| 0 | 120 | 0 | 120 |
| ±3 | 120 | 6.288 9 | 120.164 7 |
| ±6 | 120 | 12.612 5 | 120.661 0 |
| 9 | 120 | 19.006 1 | 122.495 8 |
| 12 | 120 | 25.506 8 | 122.680 9 |
| 15 | 120 | 32.153 9 | 124.233 1 |
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| 设计变量 | X1 | X2 | X3 | X4 |
| 取值范围 | -10~15 | -15~15 | -30~10 | -30~1 |
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设计变量取值范围 mm
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| 设计变量 | X1 | X2 | X3 | X4 |
| 取值范围 | -10~15 | -15~15 | -30~10 | -30~1 |
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| 优化方案 | X1 | X2 | X3 | X4 |
| 1 | 10.749 2 | -6.084 6 | -3.168 5 | -20.252 0 |
| 2 | 14.982 8 | -4.064 6 | -4.429 3 | -9.375 5 |
| 3 | -3.341 8 | 15.000 0 | -26.983 | -29.823 0 |
| 4 | 10.352 7 | 14.942 0 | -11.479 | -17.527 0 |
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优化方案设计变量 mm
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| 优化方案 | X1 | X2 | X3 | X4 |
| 1 | 10.749 2 | -6.084 6 | -3.168 5 | -20.252 0 |
| 2 | 14.982 8 | -4.064 6 | -4.429 3 | -9.375 5 |
| 3 | -3.341 8 | 15.000 0 | -26.983 | -29.823 0 |
| 4 | 10.352 7 | 14.942 0 | -11.479 | -17.527 0 |
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