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Internal Designs Application for Inlet and Nozzle Aeroperformance ImprovementThe following research results are based on development of an approach previously proposed by the authors for optimum nozzle design to obtain maximum thrust. The design was denoted a Telescope nozzle. A Telescope nozzle contains one or several internal designs of certain location, which are inserted at certain locations into a divergent conical or planar main nozzle near its exit. Such a design provides additional thrust augmentation over 20% by comparison with the optimum single nozzle of equivalent lateral area. What is more, recent experimental acoustic tests have discovered an essential noise reduction due to Telescope nozzles application. In this paper, some additional theoretical results are presented for Telescope nozzles and a similar approach is applied for aeroperformance improvement of a supersonic inlet. In addition, a classic gas dynamics problem of a similar supersonic flow into a plate has been analyzed. In some particular cases, new exact analytical solutions are obtained for a flow into a wedge with an oblique shock wave. Numerical simulations were conducted for supersonic flow into a divergent portion of a 2D or axisymmetric nozzle with several plane or conical designs as well as into a 2D or axisymmetric supersonic inlet with a forebody. The 1st order Kryko-Godunov march- ing numerical scheme for inviscid supersonic flows was used. Several cases were tested using the NASA CFL3d code based on full Navier-Stokes equations. Numerical simulation results have confirmed essential benefits of Telescope design applications in propulsion systems.
Document ID
20040053458
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Authors
Gilinsky, M. (Hampton Univ. VA, United States)
Blankson, I. M. (NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2000
Subject Category
Aircraft Propulsion And Power
Report/Patent Number
AIAA Paper 2000-3315
Meeting Information
Meeting: 36th AIAA/ASME/SAE/ASEE Joint Propulsion Conference
Location: Huntsville, AL
Country: United States
Start Date: July 17, 2000
End Date: July 19, 2000
Sponsors: Society of Automotive Engineers, Inc., American Society for Electrical Engineers, American Society of Mechanical Engineers, American Inst. of Aeronautics and Astronautics
Funding Number(s)
CONTRACT_GRANT: NAG1-1836
CONTRACT_GRANT: NAG3-2422
CONTRACT_GRANT: NAG3-2249
CONTRACT_GRANT: NAG1-1835
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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