A Prototype Thin-Film Thermocouple for Transient Heat Transfer Measurements in Ceramic-Coated Combustion Chambers Automotive Systems Laboratory, Dept. of Mechanical and Industrial Engr., University of Illinois at Urbana-Champaign Urbana, IL

Format:

Conference/Event

Author/Creator:

Assanis, Dennis N., author.

Conference Name:

International Congress & Exposition (1990-02-26 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1990

Summary:

A prototype chromel-alumel overlapping thin-film thermocouple (TFTC) has been developed for transient heat transfer measurements in ceramic-coated combustion chambers. The TFTC has been evaluated using various metallurgical techniques such as scanning electron microscopy, energy dispersive x-ray detection, and Auger electron spectroscopy. The sensor was calibrated against a standard thermocouple in ice, boiling water, and a furnace at 1000°C. The microstructural and chemical analysis of the thin-films showed the alumel film composition was very similar to the bulk material, while the chromel film varied slightly. An initial set of ceramic plug surface temperatures was taken while motoring and firing the engine at 1900 rpm to verify thermocouple operation. The data shows a 613 K mean temperature and a 55 K swing for the ceramic surface compared with a 493 K mean temperature and a 20 K swing for the metal surface at the same location. Transient heat flux calculations indicate a dramatic reduction in heat flux for the ceramic surface

Notes:

Vendor supplied data

Publisher Number:

900691

Access Restriction:

Restricted for use by site license