Numerical and experimental study of the efficiency of various methods for control of aerodynamic forces of bodies with gas-permeable porous inserts

• Main Authors: Mironov, S. G., Poplavskaya, T. V., Tsyryulnikov, I. S., Kirilovskiy, S. V.
• Format: Conference Proceeding
• Language: English
• Subjects: Aerodynamic forces; Angle of attack; Base pressure; Cellular structure; Computer simulation; Control methods; Flow control; Inserts; Mathematical models; Permeability; Porosity; Porous materials; Supersonic aircraft; Supersonic flow; Supersonic wind tunnels; Wind tunnel testing; Zero angle of attack
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/1.5117481

The paper describes the results of experimental and numerical investigations of a supersonic flow around cylindrical models with high-porosity gas-permeable inserts at a zero angle of attack. The main attention is paid to physical mechanisms of formation of aerodynamic forces and control of these forces with the use of porous inserts with different ways of using them and to comparisons of the efficiency of flow control by these methods. Methods of forming an effective pointed body by means of extension and heating the frontal insert and also methods of drag control by means of changing the base pressure are tested. The experiments are performed in a supersonic wind tunnel at Mach numbers of 4.85 and 7 and at moderate unit Reynolds numbers. The wind tunnel experiments are supplemented with testbench measurements of filtration characteristics of porous materials and numerical simulations of the flow around the models. The numerical simulations are performed on the basis of the presentation of the cellular-porous material structure in the form of a skeleton composed of coaxial rings of different diameters arranged in a staggered order. It is demonstrated that the most effective control action with the smallest energy expenses is provided by the method where the length of the porous frontal insert is used.