The study on oscillations of an opposing jet flow

Author

Jin, Chengbin ; Wang, Zhenqing ; Lv, Hongqing ; Zhang, Cuie ; Wang, Yongjun

Author_Institution

Coll. of Aerosp. & Civil Eng., Harbin Eng. Univ., Nantong

fYear

2008

fDate

10-12 Dec. 2008

Firstpage

1

Lastpage

5

Abstract

The oscillations of the flow field around a hemispherical nose with a supersonic opposing jet in a free stream of Mach 3.98 are computed. Two total pressure ratios of a jet to a free stream 0.2 and 0.6 are examined, which correspond to unsteady flow and steady flow, respectively. The axisymmetric Navier-Stokes equations with Shear-Stress Transport (SST) turbulence model are used as the governing equations in this paper. The oscillations of the flow field are reproduced, and mechanism of the oscillations is analyzed. Time-accurate algorithm is found to be necessary when an opposing jet flow field is solved, even for stable flow field. The time-averaged density distribution obtained in this paper is in good agreement with schlieren photograph. Also, the wall heat flux predicted in this paper is in agreement with experimental result.

Keywords

Navier-Stokes equations; fluid oscillations; jets; shear turbulence; transport processes; Navier-Stokes equations; flow field; hemispherical nose; opposing jet flow; oscillations; schlieren photograph; shear-stress transport turbulence model; time-averaged density distribution; wall heat flux; Aerodynamics; Aerospace engineering; Civil engineering; Educational institutions; Electric shock; Navier-Stokes equations; Nose; Protection; Space heating; Space vehicles;

fLanguage

English

Publisher

ieee

Conference_Titel

Systems and Control in Aerospace and Astronautics, 2008. ISSCAA 2008. 2nd International Symposium on

Conference_Location

Shenzhen

Print_ISBN

978-1-4244-3908-9

Electronic_ISBN

978-1-4244-2386-6

Type

conf

DOI

10.1109/ISSCAA.2008.4776290

Filename

4776290