航空科学技术
航空科學技術
항공과학기술
AERONAUTICAL SCIENCE AND TECHNOLOGY
2015年
2期
23-28
,共6页
成婷婷%蒙泽海%郗超
成婷婷%矇澤海%郗超
성정정%몽택해%치초
γ-R~eθt 转捩模型%粗糙带%自然转捩%固定转捩%数值模拟
γ-R~eθt 轉捩模型%粗糙帶%自然轉捩%固定轉捩%數值模擬
γ-R~eθt 전렬모형%조조대%자연전렬%고정전렬%수치모의
tγ-Reθ~transition model%roughness trip%free transition%ifxed artiifcial transition%numerical simulation
采用tγ?Reθ~转捩模型,对NACA0012翼型的固定转捩进行数值模拟,计算了不同雷诺数下刚好激发转捩又不引起过大局部压力扰动和附加阻力的最低粗糙带高度,说明了 tγ?Reθ~模型模拟固定转捩的能力。通过计算低雷诺数下固定转捩来模拟高雷诺数下自然转捩,计算结果表明固定转捩可以较好地模拟自然转捩。这两种计算结果对风洞试验都有重要的指导意义。
採用tγ?Reθ~轉捩模型,對NACA0012翼型的固定轉捩進行數值模擬,計算瞭不同雷諾數下剛好激髮轉捩又不引起過大跼部壓力擾動和附加阻力的最低粗糙帶高度,說明瞭 tγ?Reθ~模型模擬固定轉捩的能力。通過計算低雷諾數下固定轉捩來模擬高雷諾數下自然轉捩,計算結果錶明固定轉捩可以較好地模擬自然轉捩。這兩種計算結果對風洞試驗都有重要的指導意義。
채용tγ?Reθ~전렬모형,대NACA0012익형적고정전렬진행수치모의,계산료불동뢰낙수하강호격발전렬우불인기과대국부압력우동화부가조력적최저조조대고도,설명료 tγ?Reθ~모형모의고정전렬적능력。통과계산저뢰낙수하고정전렬래모의고뢰낙수하자연전렬,계산결과표명고정전렬가이교호지모의자연전렬。저량충계산결과대풍동시험도유중요적지도의의。
Numerically predicted the ifxed artiifcial transition on NACA0012 airfoil with transition model, the optimal roughness height trigger transition without causing excessive pressure disturbance near the roughness and without bringing extra drag was calculated. The numerical results indicated this model was able to simulate the ifxed artiifcial transition. The ability of ifxed artiifcial transition under low Reynolds number in a wind tunnel to simulate free transition under full-scale high Reynolds number in real atmospheric flight was assessed, it turned out that fixed artificial transition can simulate the free transition well. It is expected that the results will serve as guidance for ifxed artiifcial transition experiments.