Article(id=1242133750142804773, tenantId=1146029695717560320, journalId=1146031591421210625, issueId=1242133720182891229, articleNumber=null, orderNo=17, doi=10.3981/j.issn.1000-7857.2015.15.012, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1414080000000, receivedDateStr=2014-10-24, revisedDate=1433692800000, revisedDateStr=2015-06-08, acceptedDate=null, acceptedDateStr=null, onlineDate=1440727038677, onlineDateStr=2015-08-28, pubDate=1439395200000, pubDateStr=2015-08-13, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1440727038677, onlineIssueDateStr=2015-08-28, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1774077363759, creator=sys-migrate, updateTime=1774077363759, updator=sys-migrate, issue=Issue{id=1242133720182891229, tenantId=1146029695717560320, journalId=1146031591421210625, year='2015', volume='33', issue='15', pageStart='1', pageEnd='112', issueExtLink='null', onlineDate='null', pubDate='1439395200000', pubDateStr='2015-08-13', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=3, issueType=-1, specialIssue=null, createTime=1774077356616, creator='sys-migrate', updateTime=1774077356616, updator='sys-migrate', preIssue=null, nextIssue=null, articleTotal=null, ext=null, issueFiles=null, downloadFileDto=null}, startPage=76, endPage=81, ext={EN=ArticleExt(id=1242133754878178206, articleId=1242133750142804773, tenantId=1146029695717560320, journalId=1146031591421210625, language=EN, title=Numerical study on the stability of different front window angle cars in crosswind, columnId=1242116080374710456, journalTitle=Science & Technology Review, columnName=Articles, runingTitle=null, highlight=null, articleAbstract=The aerodynamic characteristics of cars driving in crosswind are studied by numerical simulation. A real car model is established and the front window angle is modified by the three-dimensional software of UG. Then numerical simulations for these models are taken using the computational fluid mechanics method. The characteristics of the body outflow field in crosswind are analyzed as well as the influences of different front window angles on the aerodynamic characteristics. As a result, the body outflow field becomes no longer symmetrical and this leads to aerodynamic side force coefficient up to 0.927, aerodynamic drag coefficient increased by 38.5% (up to 0.392) and aerodynamic lift coefficient increased by 15.6% (up to 0.281). Meanwhile, the airflow separation from the bottom at the rear is postponed and the number of vortexes is reduced since the front window angle becomes larger. The areas of positive and negative pressures are smaller. When the front window angle is 35°, there is the best aerodynamic characteristic in crosswind., authors=ZHANG Furen1 , ZHANG Jinlong1,2 , QU Xian1 , LE Huan1 , authorsList=ZHANG Furen, ZHANG Jinlong, QU Xian, LE Huan, authorCompany=1. College of Mechanical and Automobile Engineering, Chongqing Jiaotong University, Chongqing 400074, China;1 , 张金龙1,2 , 屈贤1 , 乐欢1 , authorsList=张甫仁, 张金龙, 屈贤, 乐欢, authorCompany=1. 重庆交通大学机电与汽车工程学院, 重庆400074;
科技导报
| 研究论文 2015, 33(15): 76-81
侧风作用下汽车外流场气动特性分析
全屏
张甫仁1 , 张金龙1,2 , 屈贤1 , 乐欢1
作者信息
1. 重庆交通大学机电与汽车工程学院, 重庆400074;
Numerical study on the stability of different front window angle cars in crosswind
Affiliations
出版时间: 2015-08-13
doi: 10.3981/j.issn.1000-7857.2015.15.012
文章导航
针对汽车行驶中受侧风的影响问题,通过数值模拟研究了侧风作用下汽车的气动特性。利用三维软件UG 设定某实车模型参数,基于计算流体力学方法对实车模型进行数值模拟,研究侧风作用下车身外流场变化以及不同前车窗倾角对汽车气动特性的影响。结果表明,侧风中汽车外流场不对称,导致空气侧向力系数急剧增加达到0.927,空气阻力系数增加38.5%达到0.392,空气升力系数增加15.6%达到0.281;随着前车窗倾角的增大,车身底部气流在车尾的分离推迟,尾涡数量减少,车身表面正负压区域缩小,空气侧向力及空气升力系数变小,在前车窗倾角为35°时,汽车在侧风中的气动特性最优。
汽车
/
气动特性
/
车身外流场
/
前车窗倾角
/
侧风
The aerodynamic characteristics of cars driving in crosswind are studied by numerical simulation. A real car model is established and the front window angle is modified by the three-dimensional software of UG. Then numerical simulations for these models are taken using the computational fluid mechanics method. The characteristics of the body outflow field in crosswind are analyzed as well as the influences of different front window angles on the aerodynamic characteristics. As a result, the body outflow field becomes no longer symmetrical and this leads to aerodynamic side force coefficient up to 0.927, aerodynamic drag coefficient increased by 38.5% (up to 0.392) and aerodynamic lift coefficient increased by 15.6% (up to 0.281). Meanwhile, the airflow separation from the bottom at the rear is postponed and the number of vortexes is reduced since the front window angle becomes larger. The areas of positive and negative pressures are smaller. When the front window angle is 35°, there is the best aerodynamic characteristic in crosswind.
vehicle
/
aerodynamic characteristics
/
body flow field
/
front window angle
/
crosswind
张甫仁, 张金龙, 屈贤, 乐欢.
侧风作用下汽车外流场气动特性分析.
科技导报,
2015
, 33
(15)
: 76
-81
.
DOI: 10.3981/j.issn.1000-7857.2015.15.012
ZHANG Furen, ZHANG Jinlong, QU Xian, LE Huan.
Numerical study on the stability of different front window angle cars in crosswind[J].
Science & Technology Review ,
2015
, 33
(15)
: 76
-81
.
DOI: 10.3981/j.issn.1000-7857.2015.15.012
2015年第33卷第15期
PDF下载
295
74
引用本文
BibTeX
文章信息
doi: 10.3981/j.issn.1000-7857.2015.15.012
接收时间：2014-10-24
首发时间：2015-08-28
出版时间：2015-08-13
收稿日期：2014-10-24
修回日期：2015-06-08
https://castjournals.cast.org.cn/joweb/kjdb/CN/10.3981/j.issn.1000-7857.2015.15.012
引用本文
BibTeX
2种不同金属材料的力学参数
科 属数 种数 占总种数比例 属 种数 占总种数比例 鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78 小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39 多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39 红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87 小菇属 Mycena 11 5.26 光柄菇属 Pluteus 5 2.39 红菇属 Russula 17 8.13 栓菌属 Trametes 5 2.39
关闭全屏
BibTeX
EndNote
RefWorks
TxT
PDF下载
全屏
295
74
关闭全屏
北京市海淀区学院南路86号
010-62199257（仅加盟咨询）
qkjq@cast.org.cn
