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Investigation on frequency influence on the transverse pulsed jet in a supersonic crossflow

Published online by Cambridge University Press:  15 December 2022

Z.-Z. Xu ,
Y.-M. Zhou ,
J.-P. Wu  and
W. Huang Open the ORCID record for W. Huang [Opens in a new window]
Z.-Z. Xu
Affiliation:
College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, Hunan 410073, People’s Republic of China
Y.-M. Zhou
Affiliation:
College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, Hunan 410073, People’s Republic of China
J.-P. Wu*
Affiliation:
College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, Hunan 410073, People’s Republic of China
W. Huang*
Affiliation:
College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, Hunan 410073, People’s Republic of China
*
*Correspondence authors. Emails: wujiping07@nudt.edu.cn, gladrain2001@163.com
*Correspondence authors. Emails: wujiping07@nudt.edu.cn, gladrain2001@163.com
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Abstract

The pulsed jet is a novel and effective active mixing enhancement approach. For the transverse pulsed jet in the supersonic crossflow, the frequency influence is investigated using the three-dimensional Reynolds-averaged Navier–Stokes (RANS) equations coupled with the SST k-ω turbulence model. The averaged flow field properties of the pulsed jet are better than those of the steady jet when considering mixing efficiency and jet penetration depth, especially for the case with the pulsed frequency being 50kHz. The flow field structures of the pulsed jet are connected with the time, with periodic wave structures generating in the flow field and moving downstream. The size of the wave structures and its distance are related to the frequency, namely the size and flow distance are relatively small at 50kHz, and it takes some time for the pulsed jet to establish its influence in the full flow field. At low frequencies, the flow field produces large fluctuations, and this may be detrimental to the stable operation of the engine.

Keywords

Supersonic flowTransverse jetPulsed excitationMixing efficiencyMixing enhancement
Type
Research Article
Information
The Aeronautical Journal , Volume 127 , Issue 1313 , July 2023 , pp. 1255 - 1268
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Copyright
© The Author(s), 2022. Published by Cambridge University Press on behalf of Royal Aeronautical Society

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