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Abstract

Due to the rapid increase of chemical reactivity, rate of evaporation, and heat transfer, property measurements at temperatures from 2000 to 5000 K can only be achieved by fast transient type dynamic pulse heating techniques. The necessity to accomplish temperature measurements under the extreme conditions of large heating and cooling rates, large temperature gradients and unknown emissivities led to the development of a high speed multi- wavelength pyrometer with a microsecond temporal and 50 mum spatial resolution. Measurements at six-wavelengths were chosen to determine the spectral emissivity as a function of temperature and wavelength and to evaluate the total emissivity. Test measurements on three calibrated tungsten ribbon lamps were carried out. The true temperature, the spectral and total emissivities have been determined in the steady state mode at different calibrated radiance temperatures and in the transient mode during the cooling of the tungsten ribbon lamps. In either case the data obtained are in good agreement with the literature values.

Additional information

Authors: HIERNAUT J P, JRC KARLSRUHE ESTAB. (GERMANY);BEUKERS R, JRC KARLSRUHE ESTAB. (GERMANY);HEINZ W, JRC KARLSRUHE ESTAB. (GERMANY);SELFSLAG R, JRC KARLSRUHE ESTAB. (GERMANY);HOCH M, JRC KARLSRUHE ESTAB. (GERMANY);OHSE R W JRC KARLSRUHE ESTAB. (GERMANY), JRC KARLSRUHE ESTAB. (GERMANY)
Bibliographic Reference: 10TH ETPC, EUROPEAN CONFERENCE ON THERMOPHYSICAL PROPERTIES, ROMA (ITALY), SEPT. 22-26, 1986 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 33037 ORA
Availability: Can be ordered online
Record Number: 1989125052400 / Last updated on: 1987-11-01
Category: PUBLICATION
Available languages: en