Direct Numerical Simulation of Supersonic Turbulent Boundary Layer with Spanwise Wall Oscillation
نویسندگان
چکیده
Weidan Ni 1,†, Lipeng Lu 1,†, Catherine Le Ribault 2,† and Jian Fang 1,3,*,† 1 National Key Laboratory of Science and Technology on Aero-Engine Aero-Thermodynamics, School of Energy and Power Engineering, Beihang University, 37 Xueyuan Road, Haidian District, Beijing 100191, China; [email protected] (W.N.); [email protected] (L.L.) 2 Laboratoire de Mécanique Des Fluides (LMFA), Ecole Centrale de Lyon (ECL), Unité Mixte de Recherche (UMR) 5509, 36, avenue Guy de Cloongue, 69130 Ecully, France; [email protected] 3 Computer Science and Engineering Department, Science & Technology Facilities Council (STFC), Daresbury Laboratory, Warrington WA4 4AD, UK * Correspondence: [email protected]; Tel.: +86-10-8231-6455 † These authors contributed equally to this work.
منابع مشابه
Turbulent Drag Reduction by Spanwise Wall Oscillations
The objective of this paper is to examine the effectiveness of wall oscillation as a control scheme of drag reduction. Two flow configurations are considered: constant flow rate and constant mean pressure gradient. The Navier-Stokes equations are solved using Fourier-Chebyshev spectral methods and the oscillation in sinusoidal form is enforced on the walls through boundary conditions for the sp...
متن کاملAnalysis of shock motion in shockwave and turbulent boundary layer interaction using direct numerical simulation data
Direct numerical simulation data of a Mach 2.9, 24◦ compression ramp configuration are used to analyse the shock motion. The motion can be observed from the animated DNS data available with the online version of the paper and from wall-pressure and mass-flux signals measured in the free stream. The characteristic low frequency is in the range of (0.007–0.013) U∞/δ, as found previously. The shoc...
متن کاملA numerical study of compressible turbulent boundary layers
Compressible turbulent boundary layers with free-stream Mach number ranging from 2.5 up to 20 are analyzed by means of direct numerical simulation of the Navier–Stokes equations. The fluid is assumed to be an ideal gas with constant specific heats. The simulation generates its inflow condition using the rescaling-recycling method. The main objective is to study the effect of Mach number on turb...
متن کاملNumerical Studies of Active Control of Turbulent Boundary Layers Using Transverse Travelling Waves
Turbulence control in the form of transverse wall motion is employed numerically (direct numerical simulation). Results from a turbulent boundary layer subjected to spanwise wall forcing in the form of a streamwise travelling wave are presented for the first time. Both total and phase averaging have been utilized to examine the statistical behaviour of the turbulence affected by the wall forcin...
متن کاملBoundary layer transition in high-speed flows due to roughness
Direct numerical simulation (DNS) is used to study the effect of individual (hemispherical) and distributed roughness on supersonic flat plate boundary layers. In both cases, roughness generates a shear layer and counter–rotating pairs of unsteady streamwise vortices. The vortices perturb the shear layer, resulting in trains of hairpin vortices and a highly unsteady flow. Mach 3.37 flow past a ...
متن کامل