Techniques for detailed heat transfer measurements in cold supersonic blowdown tunnels using thermochromic liquid crystals

The paper presents methods for measurement of convective heat transfer distributions in a “cold flow” supersonic blowdown wind tunnel. The techniques involve use of the difference between model surface temperature and adiabatic wall temperature as the driving temperature difference for heat transfer...

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Bibliographic Details
Published in:International journal of heat and mass transfer 2002-07, Vol.45 (16), p.3287-3297
Main Authors: Mee, D.J., Chiu, H.S., Ireland, P.T.
Format: Article
Language:English
Subjects:
Compressible flows
shock and detonation phenomena
Exact sciences and technology
Fluid dynamics
Fundamental areas of phenomenology (including applications)
Instrumentation for fluid dynamics
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Physics
Shock-wave interactions and shock effects
Shock-wave interactions and shockeffects
Thermal instruments, apparatus and techniques
Thermometry
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Summary:The paper presents methods for measurement of convective heat transfer distributions in a “cold flow” supersonic blowdown wind tunnel. The techniques involve use of the difference between model surface temperature and adiabatic wall temperature as the driving temperature difference for heat transfer and no active heating or cooling of the test gas or model is required. Thermochromic liquid crystals are used for surface temperature indication and results presented from experiments in a Mach 3 flow indicate that measurements of the surface heat transfer distribution under swept shock wave boundary layer interactions can be made.
ISSN:0017-9310
1879-2189
DOI:10.1016/S0017-9310(02)00050-9