Cryogenic Wind Tunnels.
ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT NEUILLY-SUR-SEINE (FRANCE)
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For aeronautical research the advantages of the cryogenic wind tunnel lie mainly in the practical attainment of full scale values of Reynolds number, and in the case of pressurised cryogenic tunnels the means to separate Mach and Reynolds number effects from aeroelastic effects. This Lecture series is designed for engineers, including those experienced with conventional wind tunnels, wishing to acquire in a concentrated form the principles and practices of cryogenic wind tunnels. The emphasis is on the unfamiliar facets of technology which must be applied, and on solutions to special problems which arise from the exploitation of a low temperature test gas. The Lectures provide up-to-date information on the aerodynamic and mechanical design of continuous and intermittent cryogenic wind tunnels and their models, and on techniques for controlling test parameters. Design information includes properties of materials, the storage and handling of cryogenic liquids, insulation systems for pipelines and tunnel circuits, and safety requirements. Solutions are included for the special requirements of instrumentation systems for plant, tunnel, and model. The physical processes are described which determine the lower limits of operating temperature. The material in this publication was assembled to support a Lecture Series under the sponsorship of the Fluid Dynamics Panel, the Consultant and Exchange Programme of AGARD and the von Karman Institute for Fluid Dynamics. Author
- Test Facilities, Equipment and Methods