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THE HEAT TRANSFER FROM A ROTATING DISC IN AN AIR CROSSFLOW

 

R. W. Dennis

Girling Ltd., Birmingham, England

 

C. Newstead

Girling Ltd., Birmingham, England

 

A.J. Ede

Aston University, Birmingham, England

 

Abstract

 

The heat transfer from a rotating disc in an airstream parallel to the plane of rotation is of importance in the assessment of disc brake performance.

Experimentally determined heat transfer coefficients are accordingly presented for a range of rotational speeds and air crossflow velocities. These were obtained with an electrically heated disc rotating in a wind tunnel. The extreme conditions of a stationary disc in an airflow and a rotating disc in still air are also considered.

An approximate analysis is given, based on a combination of data for a rotating disc and a stationary surface.