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

fYear

1989

fDate

18-21 Sep 1989

Firstpage

104

Lastpage

112

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation in Aerospace Simulation Facilities, 1989. ICIASF '89 Record., International Congress on

Conference_Location

Gottingen

Type

conf

DOI

10.1109/ICIASF.1989.77663

Filename

77663