Non-Parallel Receptivity and the Adjoint PSE
The receptivity of the Blasius boundary layer is studied by an adjoint formulation of the Parabolized Stability Equations (PSE). Focus is on the response of the flow to forcing at the wall (i.e. roughness, vibrations, blowing and suction), to forcing at some position within the flow domain, and on the scattering of an acoustic wave onto a hump. It is shown that acting on the flow with a source of streamwise momentum and at the wall with fluid injection and suction produces large responses. The flow sensitivity results are keys to an effective control of the instability.
KeywordReceptivity boundary layer Parabolized Stability Equations adjoints.
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