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Piston Velocities and Piston Work: The Influence of High Piston Velocities on the Pressure Distribution and Piston Work in Engine Cylinders

J.S. Glass (Research Student, Queen Mary College, London.)
J. Kestin (Professor of Mechanical Engineering, Polish University College, London.)

Aircraft Engineering and Aerospace Technology

ISSN: 0002-2667

Article publication date: 1 June 1950

Abstract

WHEN evaluating engine efficiencies, mean effective pressures or the work done by the piston in internal combustion engines or compressors, it is generally assumed that the state of the working fluid is uniform throughout its mass. From this it follows that the expression for work where P denotes pressure and V, volume, holds. Now, it is known that, strictly speaking, this expression applies only in the limiting case of zero piston velocity, when the motion of the piston, and the thermodynamic process in the cylinder are said to be quasi‐static. The question, therefore, poses itself as to how far such an assumption is justified, when applied to a modern high‐speed reciprocating engine, say, an aircraft or motorcar engine, when piston velocities of the order of 40 ft./sec. are encountered.

Citation

Glass, J.S. and Kestin, J. (1950), "Piston Velocities and Piston Work: The Influence of High Piston Velocities on the Pressure Distribution and Piston Work in Engine Cylinders", Aircraft Engineering and Aerospace Technology, Vol. 22 No. 6, pp. 163-165. https://doi.org/10.1108/eb031907

Publisher

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MCB UP Ltd

Copyright © 1950, MCB UP Limited