Condensation shocks in hypersonic nitrogen tunnelsExperimental observations and a theoretical model for the onset and disappearance of condensation are provided for hypersonic flows of pure nitrogen at M = 10, 14, and 18. A method for analyzing the thermodynamic and flow properties of a partially condensed mixture from known supply conditions and measured Pitot pressure yields the local static pressure and temperature, mass fraction of the nitrogen condensed, and the Mach number of the partially condensed flow based on frozen sound speed. The transition between partially condensed-supercooled flow is found to occur at 22-25 K isobaric supercooling with the corresponding mass fraction condensed being 12-14 percent over a range of two orders of magnitude in local static pressure. The heat released and vapor mass removed during condensation ultimately raise the local pressure and temperature and reduce the flow Mach number.
Document ID
19910056041
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hudson, Susan T. (North Carolina State Univ. Raleigh, NC, United States)
Griffith, Wayland C. (North Carolina State University Raleigh, United States)
Lederer, Melissa (North Carolina State Univ. Raleigh, NC, United States)
Ragsdale, William C. (North Carolina State Univ. Raleigh, NC, United States)
Yanta, William J. (U.S. Navy, Naval Surface Warfare Center Silver Spring, MD, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1990
Subject Category
Research And Support Facilities (Air)
Meeting Information
Meeting: International Symposium on Shock Waves and Shock Tubes