Modelling of perforated plate aerodynamics performance

This paper presents the Bohning/Doerffer law for the modelling of the flow through a perforated plate. It provides the transpiration boundary condition for numerical simulations which have been successfully used at shock wave/boundary layer interaction control. The details of the law are provided in a form that is easy for implementation in existing solvers. The background experiments and their analysis are discussed in detail. The new quality of the law is the ability to take into account the effect of a tangential stream flowing along a porous wall. Formulation of the transpiration law was associated with the development of a method for the determination of a porous plate's aerodynamic properties. A method is presented to determine the 'aerodynamic porosity', which must be used in the transpiration law. The problem of transpiration how modelling is treated complementarily and provides a description of flow behaviour together with the method of porosity determination. This way the coupling of numerical simulation and experiment has been provided. (C) 2000 Editions scientifiques et medicales Elsevier SAS.