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

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

Pediatrics

Research output: Contribution to journal › Article › peer-review

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 language	English (US)
Pages (from-to)	237-244
Number of pages	8
Journal	Acta Mechanica Sinica/Lixue Xuebao
Volume	17
Issue number	3
State	Published - Aug 2001

Keywords

Finite difference
Instability
Swirling jet

ASJC Scopus subject areas

Computational Mechanics
Mechanical Engineering

Cite this

Studies on stability and dynamics of a swirling jet. / Harada, Kenichi; Toyooka, Shinichi; Maitra, Anirban; Maruyama, Riichiroh; Toyooka, Kiyomi O.; Timmons, Charles F.; Tomlinson, Gail E.; Mastrangelo, Domenico; Hay, Robert J.; Minna, John D.; Gazdar, Adi F.

In: Acta Mechanica Sinica/Lixue Xuebao, Vol. 17, No. 3, 08.2001, p. 237-244.

Research output: Contribution to journal › Article › peer-review

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AU - Timmons, Charles F.

AU - Tomlinson, Gail E.

AU - Mastrangelo, Domenico

AU - Hay, Robert J.

AU - Minna, John D.

AU - Gazdar, Adi F.

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N2 - 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.

AB - 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.

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Studies on stability and dynamics of a swirling jet

Abstract

Keywords

ASJC Scopus subject areas

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