Effects of Backhole on Hyraulics of Liquid Rocket Swirl Coaxial Injector

액체로켓 동축형 스월인젝터에서 Backhole에 의한 수력학적 영향

  • 황성하 (서울대학교 기계항공공학부 대학원) ;
  • 설재훈 (서울대학교 기계항공공학부 대학원) ;
  • 정원호 (서울대학교 기계항공공학부 대학원) ;
  • 한풍규 (서울대학교 기계항공공학부 대학원) ;
  • 윤영빈 (서울대학교 기계항공공학부)
  • Published : 2002.08.01

Abstract

'Backhole' is an extra empty volume where is located behind the tangential entries at the rear par of the vortex chamber in the swirl coaxial injector. With the backhole, there are three major hydraulic characteristics. First, mass flow rate is increased about $15{\%}$ compared with the case without the backhole. Second, with the backhole, the center region of the injected flow has more large volume than that of without the backhole. The last, some range of the cone angle can be controlled by the backhole Experiments are conducted by using a PDPA apparatus, a mechanical patternator, stroboscopic photography and etc. With the backhole, based on cold-flow tests, the model swirl injector has some Improvement in its performance.

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