NDLI: Investigation of rest-class hypersonic inlet designs

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Investigation of rest-class hypersonic inlet designs

Content Provider	NASA Technical Reports Server (NTRS)
Author	Ferlemann, Paul G. Gollan, Rowan
Copyright Year	2011
Description	Rectangular-to-elliptical shape-transition (REST) inlets are of interest for use on scramjet engines because they are efficient and integrate well with the forebody of a planar vehicle. The classic design technique by Smart for these inlets produces an efficient inlet but the complex three-dimensional viscous effects are only approximately included. Certain undesirable viscous features often occur in these inlets. In the present work, a design toolset has been developed which allows for rapid design of REST-class inlet geometries and the subsequent Navier-Stokes analysis of the inlet performance. This gives the designer feedback on the complex viscous effects at each design iteration. This new tool is applied to design an inlet for on-design operation at Mach 8. The tool allows for rapid investigation of design features that was previously not possible. The outcome is that the inlet shape can be modified to affect aspects of the flow field in a positive way. In one particular example, the boundary layer build-up on the bodyside of the inlet was reduced by 20% of the thickness associated with the classically designed inlet shape.
File Size	1547063
Page Count	20
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20110010977
Archival Resource Key	ark:/13960/t7cs0t494
Language	English
Publisher Date	2011-04-11
Access Restriction	Open
Subject Keyword	Fluid Mechanics And Thermodynamics Navier-stokes Equation Ellipticity Hypersonic Speed Engine Design Computational Fluid Dynamics Supersonic Combustion Ramjet Engines Contours Planar Structures Iteration Grid Generation Mathematics Hypersonic Inlets Forebodies Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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