Article(id=1149418805203472520, tenantId=1146029695717560320, journalId=1146120084050784272, issueId=1149418798794572319, articleNumber=null, orderNo=null, doi=10.19562/j.chinasae.qcgc.2025.05.011, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1716480000000, receivedDateStr=2024-05-24, revisedDate=1736265600000, revisedDateStr=2025-01-08, acceptedDate=null, acceptedDateStr=null, onlineDate=1751972398326, onlineDateStr=2025-07-08, pubDate=1748102400000, pubDateStr=2025-05-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1751972398326, onlineIssueDateStr=2025-07-08, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1751972398326, creator=13701087609, updateTime=1751972398326, updator=13701087609, issue=Issue{id=1149418798794572319, tenantId=1146029695717560320, journalId=1146120084050784272, year='2025', volume='47', issue='5', pageStart='1', pageEnd='1006', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1751972396792, creator=13701087609, updateTime=1753780688390, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1157003323518837255, tenantId=1146029695717560320, journalId=1146120084050784272, issueId=1149418798794572319, language=EN, specialIssueTitle=, coverIllustrator=, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1157003323518837256, tenantId=1146029695717560320, journalId=1146120084050784272, issueId=1149418798794572319, language=CN, specialIssueTitle=, coverIllustrator=, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=910, endPage=919, ext={EN=ArticleExt(id=1149418805648068750, articleId=1149418805203472520, tenantId=1146029695717560320, journalId=1146120084050784272, language=EN, title=Dynamic Effect of Underbody Flow Separation on Aerodynamic Drag in Electric Vehicles, columnId=1149805645261664296, journalTitle=Automotive Engineering, columnName=Papers, runingTitle=null, highlight=
In this paper,an electric vehicle's aerodynamic drag and wake are numerically studied. The results show that the flow separates from the rear of the car may roll up into a large-scale vortex at ReL=1.1 107. The ratio of the RMS drag and the mean drag reaches to 3.27%,making an unneglectable effect on ride comfort and mileage prediction. The pressure at the back,the underbody,the middle and lower parts of the near wake,the aerodynamic resistance of the entire vehicle,the pressure near the wall of the rear guard plate in the bottom,and the separation flow at the bottom all have a characteristic frequency of 12 Hz. However,the flow separation at the top and C-pillar of the car does not have this characteristic frequency. It proves that the underbody flow separation at the rear is the main cause of dynamic changes of the aerodynamic drag.
, articleAbstract=
In this paper, an electric vehicle's aerodynamic drag and wake are numerically studied. The results show that the flow separates from the rear of the car may roll up into a largescale vortex at ReL=1.1 × 107. The ratio of the RMS drag and the mean drag reaches to 3.27%, making an unneglectable effect on ride comfort and mileage prediction. The pressure at the back, the underbody, the middle and lower parts of the near wake, the aerodynamic resistance of the entire vehicle, the pressure near the wall of the rear guard plate in the bottom, and the separation flow at the bottom all have a characteristic frequency of 12 Hz. However, the flow separation at the top and Cpillar of the car does not have this characteristic frequency. It proves that the underbody flow separation at the rear is the main cause of dynamic changes of the aerodynamic drag.
, correspAuthors=Qianwen Zhang, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, authorCompany=null, fund=null, authors=null, authorsList=Qianwen Zhang, Lei Xu, Qingyang Wang, Shengjin Xu), CN=ArticleExt(id=1149418823658410479, articleId=1149418805203472520, tenantId=1146029695717560320, journalId=1146120084050784272, language=CN, title=电动汽车底部流动分离对风阻的动态影响
*, columnId=1149805645391687721, journalTitle=汽车工程, columnName=研究论文, runingTitle=null, highlight=
本文对某量产电动汽车风阻和车底流动分离进行了数值研究。研究表明,在 时,车底部流动在尾部分离并向上卷曲形成展向大尺度涡。风阻系数脉动与平均值占比约为3.27%,这对乘坐舒适性及里程预报存在不可忽视的影响。车体背部、底部压力、近尾流中下部、整车气动阻力、车底中后护板近壁面压力以及车底分离流均存在12 Hz的特征频率,而车顶部及两侧的流动分离则无此特征频率,证明车底部的流动分离是引起风阻动态变化的主要原因。
, articleAbstract=
本文对某量产电动汽车风阻和车底流动分离进行了数值研究。研究表明,在ReL = 1. 1 × 107时,车底部流动在尾部分离并向上卷曲形成展向大尺度涡。风阻系数脉动与平均值占比约为3.27%,这对乘坐舒适性及里程预报存在不可忽视的影响。车体背部、底部压力、近尾流中下部、整车气动阻力、车底中后护板近壁面压力以及车底分离流均存在12 Hz的特征频率,而车顶部及两侧的流动分离则无此特征频率,证明车底部的流动分离是引起风阻动态变化的主要原因。
, correspAuthors=张倩文, authorNote=null, correspAuthorsNote=
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1 School of Aerospace Engineering,Tsinghua University,Beijing 100084
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1 清华大学航空航天学院,北京 100084
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The 1st International Conference on Intelligent Optimization of Aerodynamics and Heat Flow Control,June 14-16,2023., articleTitle=null, refAbstract=null), Reference(id=1170297177713681144, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149418805203472520, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=[16], rfOrder=20, authorNames=null, journalName=null, refType=null, unstructuredReference=中国汽车工程学会汽车空气动力学分会. 乘用车空气动力学仿真技术规范:T/CSAE 112—2019[S].[2019-07-10]., articleTitle=null, refAbstract=null), Reference(id=1170297177810150138, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149418805203472520, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=[16], rfOrder=21, authorNames=null, journalName=null, refType=null, unstructuredReference=China-SAE Automotive Aerodynamics Committee. Technical specification of passenger car aerodynamic numerical simulation:T/CSAE 112—2019[S].[2019-07-10]., articleTitle=null, refAbstract=null), Reference(id=1170297177898230525, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149418805203472520, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=[17], rfOrder=22, authorNames=null, journalName=null, refType=null, unstructuredReference=ASHTON N,REVELL A. Key factors in the use of DDES for the flow around a simplified car[J].International Journal of Heat and Fluid Flow,2015,54(43):236-249., articleTitle=null, refAbstract=null)], funds=[Fund(id=1170297176111456994, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149418805203472520, awardId=2022YFE0208000, language=CN, fundingSource=*国家重点研发计划项目(2022YFE0208000), fundOrder=null, country=null), Fund(id=1170297176178565859, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149418805203472520, awardId=CSTB2023NSCQ-BSX0021, language=CN, fundingSource=重庆市博士“直通车”项目(CSTB2023NSCQ-BSX0021), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1170297172101702303, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149418805203472520, xref=1, ext=[AuthorCompanyExt(id=1170297172110090912, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149418805203472520, companyId=1170297172101702303, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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2 中国汽车工程研究院股份有限公司风洞中心,重庆 401122)])], figs=[ArticleFig(id=1170297173796201154, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149418805203472520, language=EN, label=null, caption=null, figureFileSmall=L/QAE1DW/EYxQyqOYvIRLA==, figureFileBig=O03tbm3t8aVvjQsemLrZkA==, tableContent=null), ArticleFig(id=1170297173859115715, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149418805203472520, language=CN, label=图1, caption=
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数值模拟网格划分, figureFileSmall=wtymyt/nErgAZw/erGFLOA==, figureFileBig=iiYd9PLI3mDuxC4XGSSyYw==, tableContent=null), ArticleFig(id=1170297174215631560, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149418805203472520, language=EN, label=null, caption=null, figureFileSmall=QR2aEFG5b2wDv82kDSsShg==, figureFileBig=gJIk0QAa9901AXn5ijPiNQ==, tableContent=null), ArticleFig(id=1170297174299517641, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149418805203472520, language=CN, label=图4, caption=
整车风洞实验示意, figureFileSmall=QR2aEFG5b2wDv82kDSsShg==, figureFileBig=gJIk0QAa9901AXn5ijPiNQ==, tableContent=null), ArticleFig(id=1170297174362432202, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149418805203472520, language=EN, label=null, caption=null, figureFileSmall=aXTaZiMfs1ALL71iKO5oPQ==, figureFileBig=hklKIZOKxdJReEDzAY5aMA==, tableContent=null), ArticleFig(id=1170297174458901195, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149418805203472520, language=CN, label=图5, caption=
车底表面压力系数对比, figureFileSmall=aXTaZiMfs1ALL71iKO5oPQ==, figureFileBig=hklKIZOKxdJReEDzAY5aMA==, tableContent=null), ArticleFig(id=1170297174521815756, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149418805203472520, language=EN, label=null, caption=null, figureFileSmall=vpKZyRkJ5jetVWO6BBe2lg==, figureFileBig=UhizNIuX7UkwHWP8emdkkw==, tableContent=null), ArticleFig(id=1170297174576341709, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149418805203472520, language=CN, label=图6, caption=
整车风阻系数时间历程曲线, figureFileSmall=vpKZyRkJ5jetVWO6BBe2lg==, figureFileBig=UhizNIuX7UkwHWP8emdkkw==, tableContent=null), ArticleFig(id=1170297174639256270, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149418805203472520, language=EN, label=null, caption=null, figureFileSmall=P/e4DAIBKneCHDsAQ8FqvQ==, figureFileBig=Hogk1z7NV6KIYwZzAfzyPA==, tableContent=null), ArticleFig(id=1170297174685393615, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149418805203472520, language=CN, label=图7, caption=
风阻系数PSD曲线, figureFileSmall=P/e4DAIBKneCHDsAQ8FqvQ==, figureFileBig=Hogk1z7NV6KIYwZzAfzyPA==, tableContent=null), ArticleFig(id=1170297174748308176, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149418805203472520, language=EN, label=null, caption=null, figureFileSmall=IUyWihkpeb3I9+jb81LR0w==, figureFileBig=TTxk0iHX1+do3dBq+UAStw==, tableContent=null), ArticleFig(id=1170297174811222737, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149418805203472520, language=CN, label=图8, caption=
不同空间平面f = 12 Hz频率压力脉动能量谱(ReL = 1.1 × 107), figureFileSmall=IUyWihkpeb3I9+jb81LR0w==, figureFileBig=TTxk0iHX1+do3dBq+UAStw==, tableContent=null), ArticleFig(id=1170297174878331602, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149418805203472520, language=EN, label=null, caption=null, figureFileSmall=74FyNMwxX3R/UngsxAGs7w==, figureFileBig=njJ7CUwSyBcRTTVfKhDvJw==, tableContent=null), ArticleFig(id=1170297174949634771, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149418805203472520, language=CN, label=图9, caption=
x* = 0.09截面f = 12 Hz频率压力脉动能量谱 (ReL = 1.1 × 107)
, figureFileSmall=74FyNMwxX3R/UngsxAGs7w==, figureFileBig=njJ7CUwSyBcRTTVfKhDvJw==, tableContent=null), ArticleFig(id=1170297175004160724, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149418805203472520, language=EN, label=null, caption=null, figureFileSmall=w9iyhIsCvbJg3PUzguH+KQ==, figureFileBig=vwjWfCgOXbYI0ybd562OvA==, tableContent=null), ArticleFig(id=1170297175104824021, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149418805203472520, language=CN, label=图10, caption=
车体顶部和侧面压力谱, figureFileSmall=w9iyhIsCvbJg3PUzguH+KQ==, figureFileBig=vwjWfCgOXbYI0ybd562OvA==, tableContent=null), ArticleFig(id=1170297175163544278, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149418805203472520, language=EN, label=null, caption=null, figureFileSmall=01tH8gG/xFdayDyefqvUOg==, figureFileBig=fcsF0A6Vv61ihTuPXAtC3g==, tableContent=null), ArticleFig(id=1170297175218070231, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149418805203472520, language=CN, label=图11, caption=
底护板近壁面压力谱, figureFileSmall=01tH8gG/xFdayDyefqvUOg==, figureFileBig=fcsF0A6Vv61ihTuPXAtC3g==, tableContent=null), ArticleFig(id=1170297175314539224, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149418805203472520, language=EN, label=null, caption=null, figureFileSmall=RE4yStUWQmZG8nsnM7pOLg==, figureFileBig=NUqkgvAadYJGeOtddJd3UQ==, tableContent=null), ArticleFig(id=1170297175373259481, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149418805203472520, language=CN, label=图12, caption=
车体背部瞬时及平均压力系数云图, figureFileSmall=RE4yStUWQmZG8nsnM7pOLg==, figureFileBig=NUqkgvAadYJGeOtddJd3UQ==, tableContent=null), ArticleFig(id=1170297175444562650, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149418805203472520, language=EN, label=null, caption=null, figureFileSmall=obrGe8pUpWav2MWPoJzy7Q==, figureFileBig=j4n8iWkeudcLcboC+viTQA==, tableContent=null), ArticleFig(id=1170297175511671515, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149418805203472520, language=CN, label=图13, caption=
车底瞬时及平均表面压力系数云图, figureFileSmall=obrGe8pUpWav2MWPoJzy7Q==, figureFileBig=j4n8iWkeudcLcboC+viTQA==, tableContent=null), ArticleFig(id=1170297175624917724, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149418805203472520, language=EN, label=null, caption=null, figureFileSmall=PyMMWcWMcEiT8JKY6g0sbA==, figureFileBig=j4TFS6G9f8R6vsuA/p3GNw==, tableContent=null), ArticleFig(id=1170297175692026589, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149418805203472520, language=CN, label=图14, caption=
y/W = 0截面瞬时及平均速度云图, figureFileSmall=PyMMWcWMcEiT8JKY6g0sbA==, figureFileBig=j4TFS6G9f8R6vsuA/p3GNw==, tableContent=null), ArticleFig(id=1170297175763329758, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149418805203472520, language=EN, label=null, caption=null, figureFileSmall=H9QuHXGw0LI0aQ2hHdiD6w==, figureFileBig=/hkp04vhIM1Cyg9dtQqUfw==, tableContent=null), ArticleFig(id=1170297175830438623, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149418805203472520, language=CN, label=图15, caption=
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