Shock wave/boundary-layer interactions represent an extreme loading condition in the structural design of high-speed flight vehicles. However, the complexity of this problem has primarily restricted study to rigid, undeformed surfaces. As such, little is known regarding the impact surface deformation, due to structural compliance, has on the induced loads. The current study focuses on this problem by comparing changes in the shock-induced separation bubble length, as well as the resulting changes in the surface pressure distribution and integrated structural loads, for both static and unsteady surface deformation using a Reynolds-averaged Navier–Stokes flow solution. Results examine the differences due to the frequency of deformation, relative length between the separation bubble and deformation, and the deformation mode. Surprisingly, unsteady surface deformation is found to result in only marginal changes to the separation bubble length, whereas static surface deformation can result in both significant increases and decreases. This is linked, through analytical and numerical studies, to dependency of separation onset on both surface curvature and the spatial gradient of surface velocity, which have competing effects for harmonic motion. These findings provide important insight into the potential impact of surface compliance on shock-induced structural loads and guide the development of model reduction strategies for shock-dominated flows.


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    Title :

    Interplay of Surface Deformation and Shock-Induced Separation in Shock/Boundary-Layer Interactions


    Contributors:

    Published in:

    AIAA Journal ; 55 , 12 ; 4258-4273


    Publication date :

    2017-09-12


    Size :

    16 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English