Thermal performance demonstration of a prototype internally cooled nose tip/forebody/window assembly

Carl John Wojciechowski; Lori C. Brooks; Gene Teal; Zain Karu; David A. Kalin; Gregory W. Jones; Harold Romero

doi:10.1117/12.259823

21 November 1996 Thermal performance demonstration of a prototype internally cooled nose tip/forebody/window assembly

Carl John Wojciechowski, Lori C. Brooks, Gene Teal, Zain Karu, David A. Kalin, Gregory W. Jones, Harold Romero

Proceedings Volume 2855, High Heat Flux Engineering III; (1996) https://doi.org/10.1117/12.259823
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

Internally liquid cooled apertures (windows) installed in a full size forebody have been characterized under high heat flux conditions representative of endoatmospheric flight. Analysis and test data obtained in the laboratory and at arc heater test facilities at Arnold Engineering Development Center and NASA Ames are presented in this paper. Data for several types of laboratory bench tests are presented: transmission interferometry and imaging, coolant pressurization effects on optical quality, and coolant flow rate calibrations for both the window and other internally cooled components. Initially, using heat transfer calibration models identical in shape to the flight test articles, arc heater facility thermal test environments were obtained at several conditions representative of full flight thermal environments. Subsequent runs tested the full-up flight article including nosetip, forebody and aperture for full flight duplication of surface heating rates and exposure ties. Pretest analyses compared will to test measurements. These data demonstrate a very efficient internal liquid cooling design which can be applied to other applications such as cooled mirrors for high heat flux applications.

Citation Download Citation

Carl John Wojciechowski, Lori C. Brooks, Gene Teal, Zain Karu, David A. Kalin, Gregory W. Jones, and Harold Romero "Thermal performance demonstration of a prototype internally cooled nose tip/forebody/window assembly", Proc. SPIE 2855, High Heat Flux Engineering III, (21 November 1996); https://doi.org/10.1117/12.259823

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KEYWORDS

Liquids

Heat flux

Temperature metrology

Calibration

Copper

Silicon

Thermal modeling

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