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A two phase Mach number description of the equilibrium flow of nitrogen in ductsSome additional thermodynamic properties of the usual two-phase form which is linear in the moisture fraction are derived which are useful in the analysis of many kinds of duct flow. The method used is based on knowledge of the vapor pressure and Gibbs function as functions of temperature. With these, additional two-phase functions linear in moisture fraction are generated, which ultimately reveal that the squared ratio of mixture specific volume to mixture sound speed depends on liquid mass fraction and temperature in the same manner as do many weighted mean two-phase properties. This leads to a simple method of calculating two-phase Mach numbers for various duct flows. The matching of one- and two-phase flows at a saturated vapor point with discontinuous Mach number is also discussed.
Document ID
19790054021
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Bursik, J. W.
(Rensselaer Polytechnic Institute, Troy, N.Y., United States)
Hall, R. M.
(Rensselaer Polytechnic Inst. Troy, NY, United States)
Adcock, J. B.
(NASA Langley Research Center Fluid Dynamics Branch, Hampton, Va., United States)
Date Acquired
August 9, 2013
Publication Date
June 1, 1979
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
AIAA PAPER 79-1051
Meeting Information
Meeting: American Institute of Aeronautics and Astronautics, Thermophysics Conference
Location: Orlando, FL
Start Date: June 4, 1979
End Date: June 6, 1979
Sponsors: Astronautics, American Institute of Aeronautics
Accession Number
79A38034
Distribution Limits
Public
Copyright
Other

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