한국항공우주학회지 (Journal of the Korean Society for Aeronautical & Space Sciences)

  • 제40권11호
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  • Pages.927-933
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  • 2012
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  • 1225-1348(pISSN)
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  • 2287-6871(eISSN)
한국항공우주학회 (The Korean Society for Aeronautical and Space Sciences)
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동축류의 코안다 효과를 이용한 초음속 제트의 추력편향제어에 관한 실험적 연구

Experimental Study of Thrust Vectoring of Supersonic Jet Utilizing Co-flowing Coanda Effects

  • 윤상훈 (한국항공대학교(원) 항공우주 및 기계공학과) ;
  • 전동현 (한국항공대학교(원) 항공우주 및 기계공학과) ;
  • 허준영 (한국항공대학교(원) 항공우주 및 기계공학과) ;
  • 성홍계 (한국항공대학교 항공우주 및 기계공학부) ;
  • 이열 (한국항공대학교 항공우주 및 기계공학부)
  • 투고 : 2012.05.15
  • 심사 : 2012.09.17
  • 발행 : 2012.11.01
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초록

이차원 초음속 코안다 유동의 특성에 관한 실험적 연구가 진행되었다. 다양한 슬롯높이대 코안다 벽의 곡률반경 비 및 표면거칠기, 그리고 제트의 전압 변화에 대하여 충격파 구조 및 이력현상과 같은 코안다 유동의 특성이 유동가시화를 통하여 관찰되었다. 그 결과 초음속 코안다 제트의 이력현상은 코안다 표면거칠기의 영향을 받는 것으로 나타났다. 또한 강한 압축성 주제트의 추력편향제어를 위하여 이러한 동축류 코안다 유동이 적용되었고, 이 경우 유체역학적 추력제어의 성능은 코안다 플랩의 곡률반경에 대한 슬롯높이의 비 뿐만 아니라 주제트의 전압에 큰 영향을 받음이 확인되었다.

The characteristics of two-dimensional supersonic coanda flow was experimentally investigated. For various ratios of slot height to coanda wall's radius of curvature, surface roughnesses, and jet stagnation pressures, the characteristics of the supersonic coanda flow such as shock structures and hysteresis were observed by flow visualization. It was found that the characteristics of hysteresis of the coanda jet was related to the surface roughness of the coanda wall. The study was further extended for application of the tangentially injected coanda jet to control co-flowing highly compressible main jet direction. It was noticed that the stagnation pressure of the main jet as well as the ratio of the slot height to coanda wall's radius of curvature wall was an influencing factor in the performance of the fluidic thrust vectoring method.

키워드

참고문헌

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피인용 문헌

  1. Experimental Study of the Quantitative Characteristics of Fluidic Thrust Vectoring Nozzle for UAV vol.42, pp.9, 2014, https://doi.org/10.5139/JKSAS.2014.42.9.723
  2. Development of the High-Accuracy Multi-Component Balance for Fluidic Thrust Vectoring Nozzle of UAV vol.41, pp.2, 2013, https://doi.org/10.5139/JKSAS.2013.41.2.142
  3. Application of Backstep Coanda Flap for Supersonic Coflowing Fluidic Thrust-Vector Control vol.52, pp.10, 2014, https://doi.org/10.2514/1.J052971