Browse > Article
http://dx.doi.org/10.5139/JKSAS.2009.37.1.069

A Performance Study of Vent Mixer with Geometric Characteristics in Supersonic Flow  

Kim, Chae-Hyoung (서울대학교 기계항공공학부 대학원, IAAT)
Jeung, In-Seuck (서울대학교 기계항공공학부, IAAT)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.37, no.1, 2009 , pp. 69-75 More about this Journal
Abstract
This paper studies the aerodynamic performance that the vent mixer-new conceptual supersonic mixer-showed with its geometric characteristics. The hole is 2 mm with 2 mm's distance from the wall in case 1 and with no distance in case 2. In case 3 die hole is 1 mm. Case 1 and case 2 showed the same total pressure recovery ratio, of which the case 3 was lower than that. While cases 1-3 had the same reattachment length, the shear layer was thicker in cases 1 and 2 than in case 3. Within the recirculation zone, cases 1 and 2 had lower pressure loss and higher velocity gradient difference than case 3-they enhance mixing between air and fuel. Separation bubble which is developed by the inflow into the recirculation zone has a significant effect on the total pressure recovery ratio in the combustor. Also separation bubble influences pressure distributions and recirculation flows in the recirculation zone. Therefore, inflow rate of air into the recirculation zone mainly affects the performance of vent mixer.
Keywords
Vent Mixer; Recirculation Zone; Total Pressure Recovery; Separation Bubble;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 Smith, H. E., "The Flow Field and Heat Transfer Downstream of a Rearward Facing Step in Supersonic Flow", Aerospace Research Laboratories Paper ARL-67-0056, March 1967.
2 Ovais, U. K., and Klaus, A. H., "Flow Control Over a Backward-Facing Step with Application of a Magnetic Field", Journal of Propulsion and Power, Vol. 45, No. 2, 2008, pp. 255-263.
3 Loth, E., Kailasanath, K., and Lohner, R., " Supersonic Flow over an Axisymmetric Backward-Facing Step", Journal of Spacecraft and Rockets, Vol. 29, No. 3, 1992, pp. 352-359.   DOI
4 원수희, 정인석, 최정열, “극초음속 공기흡입 추진기관 개발의 국제적 동향 Part II: 세계적인 스크램제트 개발 프로그램”, 한국항공우주학회지, 제34권 제10호, 2006, pp. 99-110.
5 Tam, C-J, Hsu, K-Y, Gruber, M. R., and Raffoul C. N., "Aerodynamic Performance of an Injector Strut for a Round Scramjet Combustor", AIAA 2007-5403, 2007.
6 Driscoll, J. F. and Rasmussen, C. C., "Correlation and Ana lysis of Blowout Limits of Flames in High-Speed Airflows", Journal of Propulsion and Power, Vol. 21, No. 6, 2005, pp. 1035-1044.   DOI   ScienceOn
7 Thakur, A. and Segal, C, "Concentration Distribution in a Supersonic Flow Recirculation Region", Journal of Propulsion and Power, Vol. 24, No. 1, 2008, pp. 64-73.   DOI   ScienceOn
8 Sengupta, K., Russell, K., and Mashayek F., "Step Geometry and Countercurrent Effects in Dump Combustor, Part 1: Cold Flow", AIAA Journal, Vol. 45, No. 8, 2007, pp. 2033-2041.   DOI   ScienceOn
9 Gruber, M. R., Baurle, R. A., Mathur, T., and Hsu, K-Y, "Fundamental Studies of Cavity-Based Flameholder Concepts for Supersonic Combustors", Journal of Propulsion and Power, Vol. 17, No. 1, 2001, pp. 146-153.   DOI   ScienceOn
10 Kim, H. D., Matsuo, S., Setoguchi, T., "Passive Control Applied to Prandtl-Meyer Expansion Flow with Homogeneous Condensation", Aerospace Science and Technology , Vol. 8, 2004, pp. 369-376.   DOI   ScienceOn
11 김채형, 정인석, “초음속 유동장 내 벤트 혼합기에 관한 수치해석 연구”, 한국추진공학회지 제12권 제2호, 2008, pp. 33-39.   과학기술학회마을