Three-dimensional structures and unsteady nature of vortical flow fields in a half ducted propeller fan have been investigated by a detached eddy simulation (DES) based on k-ω two-equation turbulence model. The validity of the numerical simulation performed in the present study was demonstrated by the comparison to LDV measurement results. The simulation shows the tip vortex is so strong that it dominates the flow field near the rotor tip. The tip vortex does not impinge on the pressure surface of the adjacent blade directly, however it interacts with the shroud surface and induces a separation vortex on the shroud. Furthermore, this separation vortex interacts with the pressure surface of the adjacent blade. These flow structures cause high pressure fluctuation on the shroud surface and the blade pressure surface. Besides, sound pressure levels were predicted by Ffowcs William-Hawkings equation based on Lighthill’s acoustic analogy using the unsteady surface pressure data obtained by DES. As a result, the degree of contribution by each flow structure to overall sound has been estimated quantitatively.
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ASME-JSME-KSME 2011 Joint Fluids Engineering Conference
July 24–29, 2011
Hamamatsu, Japan
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-4440-3
PROCEEDINGS PAPER
Detached Eddy Simulation of Unsteady Flow Field and Prediction of Aerodynamic Sound in a Half-Ducted Propeller Fan Available to Purchase
J. H. Jeong,
J. H. Jeong
Samsung Heavy Industry, Geoje, Gyeongsangnam, Korea
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M. Furukawa
M. Furukawa
Kyushu University, Fukuoka, Japan
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K. Kusano
Kyushu University, Fukuoka, Japan
J. H. Jeong
Samsung Heavy Industry, Geoje, Gyeongsangnam, Korea
K. Yamada
Kyushu University, Fukuoka, Japan
M. Furukawa
Kyushu University, Fukuoka, Japan
Paper No:
AJK2011-22048, pp. 713-722; 10 pages
Published Online:
May 25, 2012
Citation
Kusano, K, Jeong, JH, Yamada, K, & Furukawa, M. "Detached Eddy Simulation of Unsteady Flow Field and Prediction of Aerodynamic Sound in a Half-Ducted Propeller Fan." Proceedings of the ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D. Hamamatsu, Japan. July 24–29, 2011. pp. 713-722. ASME. https://doi.org/10.1115/AJK2011-22048
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