Effect of mesh screens on the wave drag of a blunt body in supersonic flow
S.G. Mironov1, K.M. Serdyuk2
1 Khristianovich Institute of Theoretical and Applied Mechanics SB RAS; Novosibirsk State University
2 Khristianovich Institute of Theoretical and Applied Mechanics SB RAS
mironov@itam.nsc.ru, colapis@mail.ru
Keywords: supersonic flows, advanced flat mesh screens, wave drag
Pages: 201-208
Abstract
Results of an experimental study of the effect of flat mesh screens on the wave drag of a cylinder with flat face longitudinally streamlined with supersonic airflow at Mach number М = 4.85 are reported. Data on reducing the drag by meshes of various geometries and transparencies installed ahead of the cylinder face were obtained. Weighing and pneumometric measurements, and also PIV measurements of the vector velocity field, are reported. The flow pattern in the vicinity of the cylinder/screen system is visualized. It is shown possible to achieve a substantial (up to 45 %) reduction of the wave drag of the cylinder with a mesh screen. A physical interpretation to the wave-drag reduction phenomenon is given.
|
