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Transfer Calibration Validation Tests on a Heat Flux Sensor in the 51 mm High-Temperature Blackbody

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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.

No MeSH data available.


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Measured heat flux levels at different distances from the blackbody exit [stations A, B, and C].
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f5-j65mur: Measured heat flux levels at different distances from the blackbody exit [stations A, B, and C].

Mentions: Figures 5 shows the measured heat flux levels at different distances d from the blackbody aperture, with increasing blackbody temperature. The location of the aperture is assumed to be at the end of the heating region of the graphite element. The distance d is used only as a reference to locate the sensor and the radiometer at a specified location.


Transfer Calibration Validation Tests on a Heat Flux Sensor in the 51 mm High-Temperature Blackbody
Measured heat flux levels at different distances from the blackbody exit [stations A, B, and C].
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4862819&req=5

f5-j65mur: Measured heat flux levels at different distances from the blackbody exit [stations A, B, and C].
Mentions: Figures 5 shows the measured heat flux levels at different distances d from the blackbody aperture, with increasing blackbody temperature. The location of the aperture is assumed to be at the end of the heating region of the graphite element. The distance d is used only as a reference to locate the sensor and the radiometer at a specified location.

View Article: PubMed Central - PubMed

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.

No MeSH data available.


Related in: MedlinePlus