Modeling and Use of a Radial-Heat-Flow Apparatus for Intermediate and High Temperature Thermal Conductivity Measurements

Format:

Conference/Event

Author/Creator:

Yarbrough, David W., author.

Conference Name:

International Congress & Exposition (1995-02-27 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1995

Summary:

An AC-powered, radial-heat-flow apparatus has been developed for the measurement of the thermal conductivity, k, of cylindrical insulations at temperatures up to 800°C. Steady-state k measurements are made on 0.91 m-long specimens using a radiant heater as the interior heat source. The ends of a cylindrical test specimen are insulated but not actively guarded. Power to the heater is measured using a precision AC watt meter and the temperature gradient across a test specimen in the radial direction is measured by calibrated type-k thermocouples. The apparatus can be used to test cylindrical specimens with wall thicknesses up to 8 cm thick.The design of the apparatus was guided by finite-difference modeling of the two-dimension heat flow in a finite-length hollow cylinder heated on the inside. The key design parameter is the length of the specimen needed for temperature measurements at the mid-point of the specimen to be insensitive to axial heat flow

Notes:

Vendor supplied data

Publisher Number:

950614

Access Restriction:

Restricted for use by site license