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Paper Information

Journal:   AEROSPACE MECHANICS JOURNAL   MAY 2007 , Volume 3 , Number 1; Page(s) 33 To 44.
 
Paper: 

INTERACTION OF EXHAUST PLUME FROM FIXED AND MOVING NOZZLES WITH A SOLID WALL

 
 
Author(s):  AHMADIKIA H.*, PISHEH VAR A.R.
 
* MECH. ENG. GROUP, SCHOOL OF ENG., BU-ALI-SINA UNIV.
 
Abstract: 

This paper reports the numerical study of the flow field arised form impinging of a supersonic moving jet on a solid wall. The flow properties, such as surface pressure distribution are compared with the experimental data for a quasistatic case. The results show that when the distance of the nozzle from the wall is not too small, the quasi-static result is very close to that obtained from an unsteady solution. Also a new combined algebraic turbulence model is proposed for the calculation of eddy viscosity near the solid wall and the shear layer. The new combined model can suitably predict the flow structures, such as the separation region behind the nozzle, the expansion waves at the nozzle exit, the recirculation flow region near the wall, the vortices near the nozzle lateral face, and the transition of regular reflection to a Mach disk at the symmetry axis. For quantities such as the position of Mach disk, the height of the stagnation bubble, and the pressure peak on the surface, the results of the combined model is also in a better agreement with experiment than those obtained from the two-or one-equation models.

 
Keyword(s): PLUME, NOZZLE, SUPERSONIC FLOW, MOVING MESH, MOVING BOUNDARY
 
References: 
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