Experimental analysis of suction on step-induced boundary-layer transition

Compressibility Effects on Roughness-induced Boundary Layer Transition

Direct numerical simulation is used to investigate the effect of compressibility on roughness-induced boundary layer transition. Computations are performed in both the lowand the high-speed regime (at free-stream Mach number Me = 2) for an isolated three-dimensional element with cubic shape and for two-dimensional roughness strips. For each configuration two values of the roughness height Reyno...

Simulation of boundary layer transition induced by periodically passing wakes

By X I A O H U A W U , R O B E R T G. J A C O B S , J U L I A N C. R. H U N T 2 AND P A U L A. D U R B I N 1 Center for Integrated Turbulence Simulations, Flow Physics and Computation Division, Department of Mechanical Engineering, Stanford University, Building 500, Stanford, CA 94305-3030, USA e-mail: [email protected]; [email protected]; [email protected] Department of App...

Approximate Calculations of the Laminar Boundary Layer with Suction, with Particular Reference to the Suction Requirements for Boundary-Layer Stability on Aerofoils of Different Thickness/Chord Ratios

Roughness Induced Transition in a Supersonic Boundary Layer

Direct numerical simulation is used to investigate the transition induced by threedimensional isolated roughness elements in a supersonic boundary layer at a free stream Mach number of 3.5. Simulations are performed for two different configurations: one is a square planform roughness and the other is a diamond planform roughness. The mean-flow calculations show that the roughness induces counte...

Compressible boundary layer transition induced by isolated roughness elements

The laminar-to-turbulent transition of boundary layers induced by isolated threedimensional roughness elements is analyzed by mining a direct numerical simulation database, which covers the variation of many physical parameters, including Mach and Reynolds numbers, and obstacle shape and size. We find that the transition process is approximately controlled by a Reynolds number based on the mome...