Accession Number:

ADA409112

Title:

Numerical Simulation of Rarefied Nozzle Plume Impingements

Descriptive Note:

Corporate Author:

KYUSHU UNIV FUKUOKA (JAPAN) DEPT OF AERONAUTICS AND ASTRONAUTICS

Personal Author(s):

Report Date:

2000-07-09

Pagination or Media Count:

7.0

Abstract:

This paper describes numerical simulation of rarefied nozzle plume impingements. Two different reservoir pressures 400 kPa and 4 kPa are considered, In the case of 400 kPa, the simulation of the nozzle flow was conducted by using the Navier-Stokes equation and then the analysis of the plume flow was carried out by the DSMC method employing the nozzle exit conditions obtained by Navier-Stokes equation. On the other hand., for 4 kPa both the nozzle flow and the plume impingement have been calculated using the DSMC method. Concerning the angle between the nozzle axis and the flat plate, three kinds of angle are selected, that is 90 degrees, 45 degrees and 0 degrees. In addition, we considered the case where there exists a flat plate behind the nozzle. Simulated results have been compared with the existing experiments for the pressure and shear stress distributions on the flat plate. A good agreement between the DSMC results and the experiments are shown. In the case of the oblique and parallel impingements, the location of the impingement pressure peak and the stagnation point shifted upstream with increasing rarefaction.

Subject Categories:

  • Operations Research
  • Atomic and Molecular Physics and Spectroscopy
  • Combustion and Ignition

Distribution Statement:

APPROVED FOR PUBLIC RELEASE