한국전산유체공학회:학술대회논문집
- 한국전산유체공학회 2003년도 추계 학술대회논문집
- /
- Pages.126-131
- /
- 2003
초음속 주유동에 수직 분사되는 제트의 비정상 수치해석
Unsteady Numerical Analysis of Transverse Injection Jet into Supersonic Mainstream
- 최정열 (부산대학교 항공우주공학과) ;
- Choi Jeong-Yeol ;
- Yang Vigor (The Pennsylvania State University)
- 발행 : 2003.08.01
초록
A series of computational simulations have been carried out for supersonic flows in a scram jet engine with and without a cavity. Transverse injection of hydrogen, a simplest form of fuel supply, is considered in the present study with the injection pressure varying from 0.5 to 1.5 MPa. The corresponding equivalence ratios are 0.167 - 0.50. The work features detailed resolution of the flow dynamics in the combustor, which was not typically available in most of the Previous studies. In particular, oscillatory flow characteristics are captured at a scale sufficient to identify the underlying physical mechanisms. Much of the flow unsteadiness is related not only to the cavity, but also to the intrinsic unsteadiness in the flowfield. The interactions between shock waves and shear layer may cause a large excursion of flow oscillation. The role of the cavity and injection pressure are examined systematically.