Behavior of the square-back Ahmed body global modes at low ground clearance
Baptiste Plumejeau, Laurent Keirsbulck, S. Delprat, Marc Lippert, Wafik Abassi
Abstract
A study of the evolution of the wake flow of a square-back Ahmed body is presented. Various ground clearance configurations around the critical case associated with the onset of the lateral bistability are investigated. The oscillation modes vary between stable and bistable states, the corresponding Strouhal numbers for the horizontal (respectively, vertical) evolve from 0.16 (respectively, 0.27) to 0.13 (respectively, 0.18).
Topics & Concepts
Strouhal numberBistabilitySquare (algebra)Oscillation (cell signaling)WakePhysicsMechanicsGeometryMathematicsChemistryReynolds numberTurbulenceBiochemistryQuantum mechanicsAerodynamics and Fluid Dynamics ResearchFluid Dynamics and Vibration AnalysisWind and Air Flow Studies