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The Calculation of Reheat and Expansion Efficiency: The Calculation of Reheat in Gases Expanding in Converging Passages by Temperature or Pressure Measurement only

Denis J. Ryley, M.Sc.(Eng.), A.M.I.Mech.E. (Lecturer, Department of Mechanical Engineering, University of Liverpool)

Aircraft Engineering and Aerospace Technology

ISSN: 0002-2667

Article publication date: 1 January 1955

Abstract

For any convergent nozzle passing a compressible fluid and discharging against a pressure below the expanding power of the nozzle, there is a unique pressure and temperature distribution both of which depend upon the overall resistances to flow and the reheating effect incurred. By measurement of a single function of state along the flow path it is theoretically possible to calculate the reheat and expansion efficiency. The following analysis for one‐dimensional irrotational flow is an attempt to predict on a basis of theory the probable difficulties which would arise in practice and the accuracy to be expected. It is found that the pressure distribution is insensitive to reheat, but that the temperature distribution provides a fair indication.

Citation

Ryley, D.J. (1955), "The Calculation of Reheat and Expansion Efficiency: The Calculation of Reheat in Gases Expanding in Converging Passages by Temperature or Pressure Measurement only", Aircraft Engineering and Aerospace Technology, Vol. 27 No. 1, pp. 16-18. https://doi.org/10.1108/eb032513

Publisher

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MCB UP Ltd

Copyright © 1955, MCB UP Limited