Boundary-layer receptivity for a parabolic leading edge

Model Uncertainties in a Sharp Leading-Edge Hypersonic Boundary Layer

The effects of uncertainties in the gas-surface interaction and intermolecular interaction models on the hypersonic boundary layer development are investigated using the non-intrusive generalized polynomial chaos method. In particular, uncertainties in the surface shear stress, normal stress, heat flux, flowfield temperature and density resulting from uncertain viscosity exponent, surface tempe...

A Computational Approach to Swept Leading-Edge Receptivity

Computational techniques developed to simulate receptivity mechanisms near a swept-wing leadingedge are presented. The method is based on hybrid finite-difference and spectral approximations to the compressible Navier–Stokes equations in a generalized coordinate system. Particular attention is paid to boundary treatments in an effort to reduce the generation of spurious waves which can mask the...

Receptivity to surface roughness near a swept leading edge

The formation of stationary crossflow vortices in a three-dimensional boundary layer due to surface roughness located near the leading edge of a swept wing is investigated using numerical solutions of the compressible Navier–Stokes equations. The numerical solutions are used to evaluate the accuracy of theoretical receptivity predictions which are based on the parallel-flow approximation. By re...

Effect of a Sinusoidal Leading Edge Pattern on Flat Plate Boundary Layer Flow

Aerofoils with a sinusoidal leading edge pattern have been the subject of the study during the recent decade due to its considerable effect on the aerodynamics performance. The leading edge variation results in the formation of streamwise counterrotating vortices which affect the boundary layer development on aerofoils. To understand the influence of the leading edge variation to the boundary l...

Edge states in a boundary layer