Technique for transient thermal testing of thick structures

Thomas J. Horn; W. Lance Richards; Leslie Gong

doi:10.1117/12.294500

11 December 1997 Technique for transient thermal testing of thick structures

Thomas J. Horn, W. Lance Richards, Leslie Gong

Author Affiliations +

Proceedings Volume 3151, High Heat Flux and Synchrotron Radiation Beamlines; (1997) https://doi.org/10.1117/12.294500
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

A new open-loop heat flux control technique has been developed to conduct transient thermal testing of thick, thermally-conductive aerospace structures. This technique uses calibration of the radiant heater system power level as a function of heat flux, predicted aerodynamic heat flux, and the properties of an instrumented test article. An iterative process was used to generate open-loop heater power profile prior to each transient thermal test. Differences between the measured and predicted surface temperatures were used to refine the heater power level command profiles through the iterative process. This iteration process has reduced the effects of environmental and test system design factors, which are normally compensated for by closed-loop temperature control, to acceptable levels. The final revised heater power profiles resulted in measured temperature time histories which deviated less than 25 degree(s)F from the predicted surface temperatures.

Citation Download Citation

Thomas J. Horn, W. Lance Richards, and Leslie Gong "Technique for transient thermal testing of thick structures", Proc. SPIE 3151, High Heat Flux and Synchrotron Radiation Beamlines, (11 December 1997); https://doi.org/10.1117/12.294500

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