Response of turbulent jet flow to rapid compression

Author

Nuglisch, H.-J. ; Borée, J. ; Atassi, N. ; Charnay, G.

Author_Institution

Inst. de Mecanique des Fluides de Toulouse, France

fYear

1991

fDate

27-31 Oct 1991

Firstpage

68

Lastpage

73

Abstract

The authors investigated the behavior of a compressed axisymmetric jet in order to obtain a better understanding of the response of such turbulent flows to compression. Both theoretical and experimental investigations were carried out. The experimental part of the investigation is presented. The evolution of the temperature field was investigated by the cold-wire technique. The kinematic behavior of the jet during compression was studied by LDV measurements. The measurements clearly show the existence of different longitudinal zones of flow compression interaction. A rise of the longitudinal zones of flow compression interaction. A rise of the longitudinal turbulent intensity for x/D>10 was detected for the applied compression, where x is the axial distance from the ejection nozzle and D is the diameter of the nozzle. This rise causes a decrease of about 30% of the relative axial mean velocity

Keywords

jets; laser velocimetry; nozzles; turbulence; LDV measurements; aerodynamics; cold-wire; compressed axisymmetric jet; ejection nozzle; engine; flow compression; kinematic behavior; laser velocimetry; longitudinal turbulent intensity; longitudinal zones; relative axial mean velocity; temperature field; turbulent jet flow; Computational modeling; Engine cylinders; Fluid flow measurement; Internal combustion engines; Kinematics; Pistons; Predictive models; Production; Temperature; Velocity measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation in Aerospace Simulation Facilities, 1991. ICIASF '91 Record., International Congress on

Conference_Location

Rockville, MD

Type

conf

DOI

10.1109/ICIASF.1991.186226

Filename

186226