Unsteady characteristics of incompressible turbulent flow over a rectangular cavity were investigated with emphasis on its dominant frequency of oscillation and three dimensional features. Particle image velocimetry (PIV) measurements and fluctuating pressure measurements were carried out in a circulating water tunnel varying cavity length-depth ratio L/D=1 to 4 at Reθ=8,300. It is found that the dominant frequency of the fluctuation decreases with the increase of the cavity length and it exhibits broadband behavior instead of resonant one. The instantaneous flow field shows strong three dimensional distortions. Present results indicate that the spanwise distortion may weaken resonant interactions between shear layer and cavity trailing edge.
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ASME/JSME 2007 5th Joint Fluids Engineering Conference
July 30–August 2, 2007
San Diego, California, USA
Conference Sponsors:
- Fluids Engineering Division
ISBN:
0-7918-4289-4
PROCEEDINGS PAPER
Unsteady Characteristics of Turbulent Flow Over a Rectangular Cavity
Takayuki Mori,
Takayuki Mori
TRDI/Ministry of Defense, Tokyo, Japan
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Kenji Naganuma
Kenji Naganuma
TRDI/Ministry of Defense, Tokyo, Japan
Search for other works by this author on:
Takayuki Mori
TRDI/Ministry of Defense, Tokyo, Japan
Kenji Naganuma
TRDI/Ministry of Defense, Tokyo, Japan
Paper No:
FEDSM2007-37529, pp. 115-120; 6 pages
Published Online:
March 30, 2009
Citation
Mori, T, & Naganuma, K. "Unsteady Characteristics of Turbulent Flow Over a Rectangular Cavity." Proceedings of the ASME/JSME 2007 5th Joint Fluids Engineering Conference. Volume 2: Fora, Parts A and B. San Diego, California, USA. July 30–August 2, 2007. pp. 115-120. ASME. https://doi.org/10.1115/FEDSM2007-37529
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