Paper 20: The Thermodynamics of Charging and Discharging Processes
- 1 June 1965
- journal article
- other
- Published by SAGE Publications in Proceedings of the Institution of Mechanical Engineers, Conference Proceedings
- Vol. 180 (10) , 16-24
- https://doi.org/10.1243/pime_conf_1965_180_277_02
Abstract
A comprehensive analysis of charging and discharging processes is presented. The work is of particular relevance to gas exchange processes which occur in internal combustion engines. A rigorous treatment is given of discharge from and charge to a container. In the discharge process irreversibility in the container and the outlet passage are considered separately. A unique pressure-temperature relation is derived for a special case of the charging process and an equation giving the entropy change in the container is derived. It is shown that the mass trapped in the container is a linear function of the pressure in the container. The case of discharge from one container to another is considered, as is the problem of consecutive charging and discharging of one container. For simultaneous charging and discharging no entirely rigorous analysis can be derived. Two analyses—those of ‘filling and emptying’ and ‘perfect displacement’—are presented.Keywords
This publication has 2 references indexed in Scilit:
- Air Flow in a Naturally Aspirated Two-stroke EngineProceedings of the Institution of Mechanical Engineers, 1954
- Discharge of Exhaust Gases in Two-Stroke EnginesProceedings of the Institution of Mechanical Engineers, 1949