• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
  • Scopus
  • Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
  • Chinese S&T Journal Citation Reports
  • Chinese Science Citation Database
Volume 25 Issue 5
Oct.  2012
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Article Contents
ZHANG Minglu, YANG Yiren, LÜ, Zhiyong. Unsteady Characteristics of Vortex Breakdown over Delta Wing[J]. Journal of Southwest Jiaotong University, 2012, 25(5): 832-835. doi: 10.3969/j.issn.0258-2724.2012.05.016
Citation: ZHANG Minglu, YANG Yiren, LÜ, Zhiyong. Unsteady Characteristics of Vortex Breakdown over Delta Wing[J]. Journal of Southwest Jiaotong University, 2012, 25(5): 832-835. doi: 10.3969/j.issn.0258-2724.2012.05.016

Unsteady Characteristics of Vortex Breakdown over Delta Wing

doi: 10.3969/j.issn.0258-2724.2012.05.016
  • Received Date: 07 Jul 2010
  • Publish Date: 25 Oct 2012
  • In order to investigate the unsteady characteristics of the broken vortices over delta wing after the leading edge vortices were broken down, experiments of dynamic pressure measurement were carried out on the surface of the 75? sweep delta wing in a wind tunnel. Experimental results show that the root mean square (RMS) pressure fluctuation is positively correlated with the fluid state of leading edge vortices on the top surface of delta wing. At the angle of attack region with leading edge vortices breakdown, the maximal RMS pressure fluctuation is 33 Pa. With increasing angle of attack, the variation of buffeting strength has the same tendency as that of RMS pressure fluctuation. Analysis of the pressure signal shows that the pressure fluctuations over the delta wing are mainly caused by the spiral wave of the broken-down vortex flow, which leads to the buffeting of the delta wing.

     

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