The KSFM Journal of Fluid Machinery (한국유체기계학회 논문집)
- Volume 2 Issue 4 Serial No. 5
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- Pages.16-23
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- 1999
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- 2287-9706(pISSN)
Unsteady Flow Fields in a Rotor Blade Passage by Wake Passing
회전익 채널내 후류장에 의한 비정상 유동특성에 관한 연구
Abstract
The characteristic of unsteady flowfields on gas turbine, particularly on a rotor blade surface has been numerically investigated. The unsteady flow in a rotor blade passage as a result of wake/blade interaction is modeled by the inviscid flow approach, and solved by Euler equations using a time accurate marching scheme. Unsteady flow in the blade passage is induced by periodically moving a wake model across the passage inlet. The wake model used in this study is the Gaussian wate model in which the wake flow is assumed to be parallel with uniform static pressure and uniform relative total enthalpy. Numerical results show that for the case of Ps/Pr=1.5, the velocity and pressure distribution on the blade surfaces have much more complex profiles than for the case of Ps/Pr=1.0.
Keywords
- Unsteadiness;
- Rotor Blade Passage;
- Wake Model;
- Wake/Roter Interaction;
- MacCormack Scheme;
- Pitch ratio;
- Velocity Defect Vector
- 비정상성;
- 회전익 채널;
- 후류모델;
- 후류/회전익의 상호작용;
- MacCormack 기법;
- 피치비;
- 속도결함벡터;