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http://dx.doi.org/10.5139/JKSAS.2009.37.1.062

Oscillation Characteristics of Turbulent Channel Flow with Wall Blowing  

Na, Yang (건국대학교 기계공학과 대학원)
Lee, Chang-Jin (건국대학교 항공우주공학과)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.37, no.1, 2009 , pp. 62-68 More about this Journal
Abstract
The interaction between wall blowing and oxidizer flow can generate a very complicated flow characteristics in combustion chamber of hybrid rockets. LES analysis was conducted with an in-house CFD code to investigate the features of turbulent flow without chemical reactions. The numerical results reveal that the flow oscillations at a certain frequency exists on the fuel surface, which is analogous to those observed in the solid propellant combustion. However, the observation of oscillating flow at a certain frequency is only limited to a very thin layer adjacent to wall surface and the strength of the oscillation is not strong enough to induce the drastic change in temperature gradient on the surface. The visualization of fluctuating pressure components shows the periodic appearance of relatively high and low pressure regions along the axial direction. This subsequently results in the oscillation of flow at a certain fixed frequency. This implies that the resonance phenomenon would be possible if the external disturbances such as acoustic excitation could be imposed to the oscillating flow in the combustion chamber.
Keywords
Hybrid Rocket; Wall blowing; Surface Flow; Intrinsic Oscillatory Flow;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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1 S. V. Apte, and V. Yang, A large eddy simulation study of transition and flow instability in a porous-walled chamber with mass injection, J. Fluid Mechanics, Vol. 477, pp. 215-225, 2003.
2 나양, 이창진, 분출유동이 있는 채널 난류 유동의 LES 해석, 항공우주학회지, 제35권 제8호, pp. 699-705, 2007.
3 Changjin Lee, Yang Na, Young-Choon Hwang, and Sung-Taick Lee, Turbulent flow in the helical grain of hybrid rocket fuel, AIAA-2006-4344, 41st AIAA Joint propulsion meeting, Sacramento, Ca., 2006.
4 B. Evans, Nicholas A. Favorite, and K. K. Kuo, "Oxidizer-Type and Aluminum-Particle Addition Effects on Soild-Fuel Burning Behavior", AIAA paper 06-4676, 42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2006.
5 구원모, 이창진, 산화제 난류 유동 변화에 대한 하이브리드 로켓 연소 특성, 한국추진공학회 춘계학술대회 논문, 2007.
6 K.H Shin, C. Lee, S. Y. Chang, and J. Y. Koo, "The enhancement of regression rate of hybrid rocket fuel by various method", AIAA 2005-0359, 2005.
7 J. P. Avres and H. S. Jones, "Explanation of DC-shift in Hybrid Rocket Motor", AIAA Paper 1997-2938, 1997.
8 Boardmann T. A., Carpenter, R. L. and Clafin, S. E., A Comparative Study of the Effect of Liquid versus Gaseous Oxygen Injection on Combustion Stability in 11 inch Diameter Hybrid Motors, AIM Paper 1997-2936, 1997.
9 J. P. Avres and H. S. Jones, "Elimination of DC-shift in Hybrid Motors", AIAA Paper 1997-2939, 1997.
10 M. A. Karabeyoglu "Thermal Transients in Hybrid Rockets Fuel Grains-Nan-Linear Effects" AIAA paper 07-5369, Cincinnati, OH, 2007.
11 G. Avalon, G. Casalis, and J. Griffond , "Flow Instabilities and Acoustic resonance of channels with wall injection", AIAA paper 98-3218, Cleveland, OH, 1998.