Journal of Mechanical Science and Technology

  • 제20권6호
  • /
  • Pages.874-881
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  • 2006
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  • 1738-494X(pISSN)
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  • 1976-3824(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
권호 표지

Combustion Stability Characteristics of the Model Chamber with Various Configurations of Triplet Impinging-Jet Injectors

  • Sohn Chae-Hoon (Department of Aerospace Engineering, Chosun University) ;
  • Seol Woo-Seok (Rocket Engine Department, Korea Aerospace Research Institute) ;
  • Shibanov Alexander A. (Research Institute of Chemical Machine Building (NIICHIMMASH), Sergiev Posad)
  • 발행 : 2006.06.01
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초록

Combustion stability characteristics in actual full-scale combustion chamber of a rocket engine are investigated by experimental tests with the model (sub-scale) chamber. The present hot-fire tests adopt the combustion chamber with three configurations of triplet impinging-jet injectors such as F-O-O-F, F-O-F, and O-F-O configurations. Combustion stability bound-aries are obtained and presented by the parameters of combustion-chamber pressure and mixture (oxidizer/fuel) ratio. From the experimental tests, two instability regions are observed and the pressure oscillations have the similar patterns irrespective of injector configuration. But, the O-F-O injector configuration shows broader upper-instability region than the other configurations. To verify the instability mechanism for the lower and upper instability regions, air-purge acoustic test is conducted and the photograph or the flames is taken. As a result, it is found that the pressure oscillations in the two regions can be characterized by the first impinging point of hydraulic jets and pre-blowout combustion, respectively.

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참고문헌

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