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- W2891425631 abstract "In this work, a receptivity analysis of the boundary layer evolving along a NACA-0012 wingprofile with suction at wall surface is considered. The environmental perturbations that arrive from thefree stream and enter the boundary layer, such as acoustic or vortical waves, do not have the correctwave parameters (i.e., the frequency and the wavelength) to excite the instability wave. Thus, a wavemodulationmechanism is needed in order to create the modal instability. The interaction between theexternal disturbance and the perturbation induced in the boundary layer by suction at the wing surface canactivate this mechanism. In the model proposed here, the Navier-Stokes equations that govern the problemare linearized around a basic flow which is determined by the boundary-layer equations. Besides,considering that the boundary layer evolves with two different length scales, the theory of multiple scalesis employed to solve the receptivity problem. A solvability condition, given by the orthogonality relationbetween the adjoint eigenfunction (solution of the adjoint eigenvalue problem) and the non-homogeneousterm of the receptivity differential equation, allows the solution of the non-homogeneous problem. Afterimposing the solvability condition, a first-order differential equation with variable coefficients isobtained. The analytical expression of this equation gives the solution of the complex multiplicativecoefficient that allows the wave-amplitude estimation as well as the obtention of the here-denominatedreceptivity function which gives an estimation of how receptive is the airfoil boundary layer to the considereddisturbances." @default.
- W2891425631 created "2018-09-27" @default.
- W2891425631 creator A5033024247 @default.
- W2891425631 date "2006-01-01" @default.
- W2891425631 modified "2023-09-26" @default.
- W2891425631 title "Boundary-Layer Receptivity Analysis Of A Naca-0012 Airfoil Withwall Suction." @default.
- W2891425631 hasPublicationYear "2006" @default.
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