Role of Transient Growth in Roughness-Induced Transition
Role of Transient Growth in Roughness-Induced Transition
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DOI：
10.2514/1.9558
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发表时间：
2004-04
期刊：
影响因子：
2.5
通讯作者：
E. Reshotko;A. Tumin
中科院分区：
文献类型：
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作者：
E. Reshotko;A. Tumin
表面粗糙度会对边界层转变产生深远的影响。然而，负责三维分布粗糙度转变的机制一直难以捉摸。过去已经研究了各种基于 Tollmien-Schlichting 的机制，但已被证明不适用。最近，人们研究了瞬态生长理论对粗糙度引起的转变的适用性。开发了一种粗糙度引起的转变模型，该模型利用基于本作者开创的空间瞬态增长理论的计算结果。对于鼻尖过渡，产生的过渡关系再现了 Reda 和被动鼻尖技术 (PANT) 数据的趋势，并解释了粗糙度和表面温度水平对过渡行为的单独作用
Surface roughness can have a profound effect on boundary-layer transition. However, the mechanisms responsible for transition with three-dimensional distributed roughness have been elusive. Various Tollmien-Schlichting-based mechanisms have been investigated in the past but have been shown not to be applicable. More recently, the applicability of transient growth theory to roughness-induced transition has been studied. A model for roughness-induced transition is developed that makes use of computational results based on the spatial transient growth theory pioneered by the present authors. For nosetip transition, the resulting transition relations reproduce the trends of the Reda and passive nosetip technology (PANT) data and account for the separate roles of roughness and surface temperature level on the transition behavior