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받음각이 있는 3차원 초음속 흡입구 주위의 유동진동 해석 : Numerical Analysis of Flow Characteristics around 3D Supersonic Inlet at Various Angle of Attack
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- Authors
- Issue Date
- 2011-05
- Publisher
- 한국전산유체공학회
- Citation
- 한국전산유체공학회 2011년도 춘계학술대회, pp. 218-224
- Keywords
- 공학 ; 초음속 흡입구 ; supersonic intake ; 받음각 ; Angle of attack ; 입출구 비 ; T.R.
- Abstract
- A supersonic inlet at angle of attack has anti-symmetric pressure distribution, and it can make flow instability and structural problem. In this study, numerical analysis of three-dimensional inviscid flow was conducted under various throttle ratio and angle of attack conditions. Throttle ratio was defined as the ratio of the exit area to the smallest cross section area at inlet, and the ratio is controlled from 0 to 2.42. At various angle of attack, the characteristics of steady and unsteady flow around supersonic inlet is observed under different throttling ratios. From these results, pressure recovery curves and pressure history curves were plotted by post processing. Using pressure history data, FFT analysis is also carried out. Through these processes, it shows the tendency of pressure distribution anti-symmetricity and changing dominant frequency as increasing angle of attack.
- Language
- Korean
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