Studies on stability and dynamics of a swirling jet

Kenichi Harada, Shinichi Toyooka, Anirban Maitra, Riichiroh Maruyama, Kiyomi O. Toyooka, Charles F. Timmons, Gail E. Tomlinson, Domenico Mastrangelo, Robert J. Hay, John D. Minna, Adi F. Gazdar

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

The temporal instability and nonlinear evolution of the swirling jet near a nozzle exit are studied by both normal-mode method and three dimensional direct numerical simulation (3D DNS). It is found that the swirl enhances the maximum linear growth rates for negative helical modes, while decreases the growth rate for axisymmetric mode. Numerical simulations show that the evolution in early sage is compared well with the linear stability theory. In nonlinear stage, the swirl promotes the breakup of 3D large scale organized structures in the flow into small eddies.

Original languageEnglish (US)
Pages (from-to)237-244
Number of pages8
JournalActa Mechanica Sinica/Lixue Xuebao
Volume17
Issue number3
StatePublished - Aug 2001

Keywords

  • Finite difference
  • Instability
  • Swirling jet

ASJC Scopus subject areas

  • Computational Mechanics
  • Mechanical Engineering

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    Harada, K., Toyooka, S., Maitra, A., Maruyama, R., Toyooka, K. O., Timmons, C. F., Tomlinson, G. E., Mastrangelo, D., Hay, R. J., Minna, J. D., & Gazdar, A. F. (2001). Studies on stability and dynamics of a swirling jet. Acta Mechanica Sinica/Lixue Xuebao, 17(3), 237-244.