Centrifugal instability in a turbulent wall jet over a circular cylinder

Himanshu Joshi, Anatoli Tumin

Research output: Contribution to conferencePaper

Abstract

The vortex instability mode is considered in a turbulent wall jet over a circular cylinder. The linear and nonlinear stability analyses are carried out within the scope of the parabolized stability equations. The results demonstrate that the neutral point may depend on the initial conditions because of the transient growth phenomenon but, farther downstream, the results collapse onto one curve. The marching method is compared with a quasi-parallel normal mode analysis. It is shown that the growth rate is overestimated in the normal mode approach. The results indicate that the zero harmonic (with respect to the spanwise direction) generated due to nonlinear effects may shift the maximum measured velocity profile farther from the surface than it is in a wall-jet over a flat wall.

Original languageEnglish (US)
Pages6961-6972
Number of pages12
StatePublished - Jul 1 2004
Event42nd AIAA Aerospace Sciences Meeting and Exhibit - Reno, NV, United States
Duration: Jan 5 2004Jan 8 2004

Other

Other42nd AIAA Aerospace Sciences Meeting and Exhibit
CountryUnited States
CityReno, NV
Period1/5/041/8/04

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ASJC Scopus subject areas

  • Engineering(all)

Cite this

Joshi, H., & Tumin, A. (2004). Centrifugal instability in a turbulent wall jet over a circular cylinder. 6961-6972. Paper presented at 42nd AIAA Aerospace Sciences Meeting and Exhibit, Reno, NV, United States.