천음속유동에서 초임계익형의 후연확대수정의 영향

• 영문명: Effect of divergent Trailing Edge Modification of Supercritical Airfoil in Transonic Flow
• 발행기관: 강원대학교 산업기술연구소
• 저자명: 유능수(Yoo Neung Soo)
• 간행물 정보: 『산업기술연구』vol.17, 183~189쪽, 전체 7쪽
• 주제분류: 공학 > 공학일반
• 파일형태: PDF
• 발행일자: 1997.09.30

영문 초록

The computation of the flow around a supercritical airfoil with a divergent trailing edge(DTE) modification(DLBA 243) is compared to that of original supercritical airfoil(DLBA 186). For this computation, Reynolds-Averaged Navier-Stokes equations are solved with a linearized block implicit ADI method and a mixing length turbulence model. Results show the effects of the shock and separated flow regions on drag reduction due to DTE modification. Results also show that DTE modification accelerates the boundary layer flow near the trailing edges which has an effect similar to a chordwise extension that increases circulation and is consistent with the calculated increase in the recirculation region in the wake. Airfoil with DTE modification achieves the same lift coefficient at a lower incidence and thus at a lower drag coefficient, so that lift-to-drag ratio is increased in transonic cruise conditions compared to the original airfoil. The reduction in drag due to DTE modification is associated with weakening of shock strength and delay of shock which is greater than the increase in base drag.

목차

ABSTRACT

1. INTRODUCTION

2. COMPUTATIONAL METHOD

3. RESULTS

4. CONCLUSION

REFERENCES