Euler flow in a supersonic mixed-compression inlet

Jain, Manish Kumar ; Mittal, Sanjay (2006) Euler flow in a supersonic mixed-compression inlet International Journal for Numerical Methods in Fluids, 50 (12). pp. 1405-1423. ISSN 0271-2091

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/fld.110...

Related URL: http://dx.doi.org/10.1002/fld.1109

Abstract

Numerical simulation of a two-dimensional mixed compression supersonic inlet is carried out by solving unsteady compressible Euler equations via a stabilized finite element method. The geometry of the inlet is similar to the one used by Anderson and Wong for experimental investigation for Mach 3 flow. The computations are capable of simulating the start-up problems associated with the inlet. The critical back pressure for the successful operation of the inlet is computed. The effect of inlet back pressure on the total pressure recovery and the flow distortion level is analysed. Contrary to the popular belief, it is found that in addition to the throat to inlet capture area ratio, the ramp geometry close to the throat plays an important role in the start-up dynamics. It is demonstrated via simulations that, everything else being same, the geometries of ramp upstream of the throat that are associated with a curvature higher than a certain threshold, result in unstarting the intake.

Item Type:Article
Source:Copyright of this article belongs to John Wiley and Sons, Inc.
Keywords:Supersonic Flow; Air Intake; Mixed Compression; Finite Element; Euler Equations; Start-up
ID Code:24776
Deposited On:30 Nov 2010 09:15
Last Modified:02 Mar 2011 06:57

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