Experimental study on the developing process of steady Blunt-Body supersonic flow in the shock tube and numerical simulation = 충격파관에서 정상 초음속 Blunt-Body 유동장이 확립되는 과정에 관한 실험연구 및 수치적 시뮬레이션

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The goal of this study is to investigate the shock wave dynamics in the shock tube equipped with a supersonic nozzle block inside. Numerical simulation is first made using two-dimensional unsteady compressible Euler equation. AUSM+ upwind scheme is applied since it is known robust in the high mach number flows without entropy fixing. We need adaptive unstructured quadrilateral grids with the finite volume method and MUSCL approach. We consequently showed how the plane moving shock wave entering into a supersonic nozzle is changed to a steady bow shock wave in front of a blunt body in the shock tube. The nozzle contour was designed by Method Of Characteristics (MOC). Experimentally, helium is used to achieve high mach number shock wave, namely, $M_s=2.59$ in the present study. The high subsonic flow behind the moving shock wave is accelerated to a supersonic flow in the nozzle, impeding the reflection of moving shock wave from the blunt body. Steady bow shock wave is thus obtained after a brief transitional process. Shadowgraphy and a double-pulse holographic interferometry are used to visualize the shock tube flow converging to a steady supersonic flow in front of a two-dimensional blunt body having semi-circular head form and an aero-spike. Comparison with the computational result is presented. Good agreement is obtained.
Advisors
Chang, Keun-Sikresearcher장근식researcher
Description
한국과학기술원 : 항공우주공학전공,
Publisher
한국과학기술원
Issue Date
2000
Identifier
158189/325007 / 000983479
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 항공우주공학전공, 2000.2, [ v, 72 p. ]

Keywords

Shock Tube; Blunt Body; Spike; AUSM+ scheme; Heilum-Air Gas Mixture; 헬륨-공기 혼합기체; 충격파관; 무딘물체; 스파이크; AUSM+수치기법

URI
http://hdl.handle.net/10203/26868
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=158189&flag=dissertation
Appears in Collection
AE-Theses_Master(석사논문)
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