Item Details

Pilot Model Expansion Tunnel Test Flow Properties Obtained From Velocity, Pressure, and Probe Measurements

by Wilfred J. Friesen and John A. Moore
Format
Book; Government Document; Online; EBook
Published
Washington, D.C. : National Aeronautics and Space Administration ; [Springfield, Va. : For sale by the National Technical Information Service], 1973.
Language
English
Series
NASA Technical Note
Summary
Velocity-profile, pitot-pressure, and supplemental probe measurements were made at the nozzle exist of an expansion tunnel (a modification to the Langley pilot model expansion tube) for a nozzle net condition of a nitrogen test sample with a velocity of 4.5 km/sec and a density 0.005 times the density of nitrogen at standard conditions, both with the nozzle initially immersed in a helium atmosphere and with the nozzle initially evacuated. The purpose of the report is to present the results of these measurements and some of the physical properties of the nitrogen test sample which can be inferred from the measured results. The main conclusions reached are that: the velocity profiles differ for two nozzle conditions; regions of the flow field can be found where the velocity is uniform to within 5 percent and constant for several hundred microseconds; the velocity of the nitrogen test sample is reduced due to passage through the nozzle; and the velocity profiles do not significantly reflect the large variations which occur in the inferred density profiles.
Description
iv, 104 p. : ill. ; 27 cm.
Mode of access: Internet.
Notes
  • Prepared at Langley Research Center.
  • Cover title.
  • Bibliography: p. 38.
Series Statement
NASA technical note ; NASA TN D-7310
Logo for Copyright Not EvaluatedCopyright Not Evaluated
Technical Details

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    a| Pilot model expansion tunnel test flow properties obtained from velocity, pressure, and probe measurements c| by Wilfred J. Friesen and John A. Moore.
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    a| Washington, D.C. : b| National Aeronautics and Space Administration ; a| [Springfield, Va. : b| For sale by the National Technical Information Service], c| 1973.
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    a| iv, 104 p. : b| ill. ; c| 27 cm.
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    a| NASA technical note ; v| NASA TN D-7310
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    a| Prepared at Langley Research Center.
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    a| Cover title.
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    a| Bibliography: p. 38.
    520
      
      
    a| Velocity-profile, pitot-pressure, and supplemental probe measurements were made at the nozzle exist of an expansion tunnel (a modification to the Langley pilot model expansion tube) for a nozzle net condition of a nitrogen test sample with a velocity of 4.5 km/sec and a density 0.005 times the density of nitrogen at standard conditions, both with the nozzle initially immersed in a helium atmosphere and with the nozzle initially evacuated. The purpose of the report is to present the results of these measurements and some of the physical properties of the nitrogen test sample which can be inferred from the measured results. The main conclusions reached are that: the velocity profiles differ for two nozzle conditions; regions of the flow field can be found where the velocity is uniform to within 5 percent and constant for several hundred microseconds; the velocity of the nitrogen test sample is reduced due to passage through the nozzle; and the velocity profiles do not significantly reflect the large variations which occur in the inferred density profiles.
    538
      
      
    a| Mode of access: Internet.
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    a| Aerodynamics, Hypersonic.
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    a| Gas flow.
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    a| Nozzles.
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    0
    a| Pitot tubes.
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    a| Moore, John A.
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    a| Langley Research Center.
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    a| United States. b| National Aeronautics and Space Administration.
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