Twenty-five years of aerodynamic research with IR imaging

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Abstract
Infrared imaging used in aerodynamic research evolved during the last 25 years into a rewarding experimental technique for investigations of body-flow field viscous interactions, such as heat-flux determination and boundary layer transition. The technique of infrared imaging matched well its capability to produce useful results, with the expansion of testing conditions in the entire spectrum of wind tunnels, from hypersonic high-enthalpy facilities to cryogenic transonic wind tunnels. With unique achievements credited to its past, the current trend suggests a change in attitude towards this technique: from the perception as an exotic, project-oriented tool, to the status of a routine experimental procedure.

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