Title :
Liquid crystal thermography for aerodynamic heating measurements in short duration hypersonic facilities
Author :
Smith, A.J.D. ; Baxter, D.R.J.
Author_Institution :
Dept. of Aeronaut. & Astronaut., Southampton Univ., UK
Abstract :
A method has been developed which applies liquid-crystal thermography to the measurement of surface heat flux short-duration hypersonic facilities. Flat-plate thermographs are compared with Eckert´s prediction of surface heat flux to provide a calibration which replaces the liquid-crystal static color calibration. This allows measurements of high surface heat flux, avoiding sources of error associated with the large temperature gradient through the liquid-crystal layer and its response time. In conjunction with this, a multi-substrate model construction has been used, which allows measurement of surface heat flux on complex configurations. The technique has been successfully applied over a wide range of model scales and test times
Keywords :
calibration; flow visualisation; hypersonic flow; infrared imaging; liquid crystal displays; thermal variables measurement; wind tunnels; Eckert´s prediction; aerodynamic heating measurements; calibration; flat plate thermographs; liquid-crystal thermography; model scales; multi-substrate model; short duration hypersonic facilities; surface heat flux; wind tunnels; Aerodynamics; Calibration; Extraterrestrial measurements; Heat transfer; Heating; Liquid crystals; Pistons; Temperature; Testing; Thermal conductivity;
Conference_Titel :
Instrumentation in Aerospace Simulation Facilities, 1989. ICIASF '89 Record., International Congress on
Conference_Location :
Gottingen
DOI :
10.1109/ICIASF.1989.77663
