Abstract

BUNT, E.A.. Incorporation of Rayleigh lines into Joule cycle processes to allow for heating pressure drops. R&D j. (Matieland, Online) [online]. 1995, vol.11, pp.40-49. ISSN 2309-8988.

Rayleigh lines, representing states of constant mass flux per unit area when heat is transferred to or from a gas, are proposed for use in a modified open or closed Joule cycle (to replace lines of constant pressure) to better describe cases such as regenerative heat transfer and reheating, as well as combustion processes in jet engines, by allowing for pressure drops during heating. The application of Rayleigh lines for this purpose is simplified by the fact that at low subsonic Mach numbers, lines for different mass velocities (which may result from varying mass flow or combustion chamber area) tend to coincide. The efficiency of such a modified Joule cycle is derived.

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