• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2010년도 제35회 추계학술대회논문집
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• pp.758-759
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• 2010

본 논문에서는 포물선 형상의 팽창부로 설계된 이차원 노즐(M=3)에 톱니 형태의 대칭 및 비대칭 파동 채널을 교대로 설치하여 원형 음속 노즐에서 발생하는 추력과의 추력편차를 측정함으로써, 두 파동 벽면 내에서 일어나는 조파저항의 공진현상을 실험적으로 확인하였다.

• 한국가시화정보학회지
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• 제8권3호
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• pp.56-62
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• 2010

The interaction patterns between shock wave and boundary layer in a rocket nozzle are mainly classified into two categories, FSS(Free Shock Separation) and RSS(Restricted Shock Separation), both of which are associated with the thrust characteristics as well as side loads of the engine. According to the previous investigations, strong side loads of the engine are produced during the period of transition from FSS to RSS or vice versa. The present work aims at investigating the unsteady behavior of the separation shock waves in a two-dimensional supersonic nozzle, using experimental method and CFD. Schlieren optical method was employed to visualize the time-mean and time-dependent shock motions in the nozzle. The unsteady, compressible N-S equations with SST K-$\omega$ turbulence closure were solved using a fully implicit finite volume scheme. The results obtained show the separation shock motions during the transition of the interaction pattern.