title: Transfer Calibration Validation Tests on a Heat Flux Sensor in the 51 mm High-Temperature Blackbody.
abstract: Facilities and techniques to characterize heat flux sensors are under development at the National Institute of Standards and Technology. As a part of this effort, a large aperture high-temperature blackbody was commissioned recently. The graphite tube blackbody, heated electrically, has a cavity diameter of 51 mm and can operate up to a maximum temperature of 2773 K. A closed-loop cooling system using a water-to-water heat exchanger cools electrodes and the outer reflecting shield. This paper describes the newly developed blackbody facility and the validation tests conducted using a reference standard Schmidt-Boelter heat flux sensor. The transfer calibration results obtained on the Schmidt-Boelter sensor agreed with the previous data within the experimental uncertainty limits.
authors: Aero-Tech, Inc., Hampton, VA 23666.
authors: A V
authors: AV
authors: Murthy
authors: National Institute of Standards and Technology, Gaithersburg, MD 20899-8441.
authors: B K
authors: BK
authors: Tsai
authors: Saunders Enterprises, Gaithersburg, MD 20878.
authors: R D
authors: RD
authors: Saunders
keywords: blackbodies; heat flux; sensors; thermal radiation; transfer calibration