Journal of South China University of Technology (Natural Science Edition) ›› 2015, Vol. 43 ›› Issue (2): 96-101.doi: 10.3969/j.issn.1000-565X.2015.02.014

• Mechanical Engineering • Previous Articles     Next Articles

Theoretical Investigation into Friction Ｒesistance Calculation of Van Body Surface in the Presence of Air Film

Xie Xiao-peng Cao Li-feng Zeng Jian-hao   

  1. School of Mechanical and Automotive Engineering，South China University of Technology，Guangzhou 510640，Guangdong，China
  • Received:2014-08-05 Revised:2014-11-28 Online:2015-02-25 Published:2014-12-31
  • Contact: 曹立峰(1984-)，男，博士生，主要从事摩擦学理论与应用研究． E-mail:clif-cherry2008@163.com
  • About author:谢小鹏(1961-)，男，教授，博士生导师，主要从事摩擦学理论与应用研究． E-mail: xiexp@ scut． edu． cn
  • Supported by:
    Supported by the Proiect of Integration of Industry，Education and Ｒesearch of Guangdong Province and Ministry of Educational of China(2011A090200013)

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Abstract: According to the friction resistance decrease of van body surface observed by experiments in the presence of air film，three theories，namely the thickened boundary layer theory，the mixed deceleration theory and the thickened boundary layer-mixed deceleration theory，are put forward to explore the mechanism of air-film drag re-duction，and a model to calculate the friction resistance of van body surface in the presence of air film is estab-lished． Then，the friction resistances of van body surface with and without air film are qualitatively compared and analyzed，respectively． The results show that the friction resistance decreases in the presence of air film，which is consistent with the previous experimental results obtained by the authors． This research provides a theoretical foun-dation for the practical application of air-film drag reduction of van body surface．

Key words: van, air-film drag reduction, friction resistance, calculation model

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