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Computational method to predict thermodynamic, transport, and flow properties for the modified Langley 8-foot high-temperature tunnelThe Langley 8 foot high temperature tunnel (8 ft HTT) is used to test components of hypersonic vehicles for aerothermal loads definition and structural component verification. The test medium of the 8 ft HTT is obtained by burning a mixture of methane and air under high pressure; the combustion products are expanded through an axisymmetric conical contoured nozzle to simulate atmospheric flight at Mach 7. This facility was modified to raise the oxygen content of the test medium to match that of air and to include Mach 4 and Mach 5 capabilities. These modifications will facilitate the testing of hypersonic air breathing propulsion systems for a wide range of flight conditions. A computational method to predict the thermodynamic, transport, and flow properties of the equilibrium chemically reacting oxygen enriched methane-air combustion products was implemented in a computer code. This code calculates the fuel, air, and oxygen mass flow rates and test section flow properties for Mach 7, 5, and 4 nozzle configurations for given combustor and mixer conditions. Salient features of the 8 ft HTT are described, and some of the predicted tunnel operational characteristics are presented in the carpet plots to assist users in preparing test plans.
Document ID
19920017950
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Venkateswaran, S.
(Lockheed Engineering and Sciences Co. Hampton, VA., United States)
Hunt, L. Roane
(NASA Langley Research Center Hampton, VA, United States)
Prabhu, Ramadas K.
(Lockheed Engineering and Sciences Co. Hampton, VA., United States)
Date Acquired
September 6, 2013
Publication Date
July 1, 1992
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
L-17013
NAS 1.15:4374
NASA-TM-4374
Accession Number
92N27193
Funding Number(s)
PROJECT: RTOP 506-43-31-05
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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