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Variable cycle jet engines for a Mach 2·7 supersonic civil transport

Published online by Cambridge University Press:  04 July 2016

L. Aleid  and
P. Pilidis
L. Aleid
Affiliation:
School of Mechanical Engineering , Cranfield University , Cranfield, Beds, UK
P. Pilidis
Affiliation:
School of Mechanical Engineering , Cranfield University , Cranfield, Beds, UK
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Abstract

The aim of the work outlined in this paper is to compare three different variable cycle jet engine concepts for future SSTs. These engines are: the turbofan-turbojet, the mid-tandem fan engine and the double bypass engine. The comparison is carried out on the basis of unin-stalled and installed performance, handling and sizing issues.

This preliminary analysis compares SFC, size, variable geometry and cycle changes for each engine. The installed performance was estimated by calculating the air friction, the pre-entry and the afterbody drags, together with the wave drag due to the shock waves. A sizing calculation was carried out for the whole nacelle. The uninstalled and installed fuel bill, for two standard missions, is also estimated.

These preliminary results indicate that the turbofan-turbojet and the mid-tandem fan engines are quite similar in terms of general suitability. The mid-tandem fan appears to be an attractive proposition from the point of view of sizing, however, this comes with a small penalty in fuel consumption. The present double bypass engine was found to be the least attractive for the application, although the differences are small.

Type
Research Article
Information
The Aeronautical Journal , Volume 102 , Issue 1011 , January 1998 , pp. 31 - 36
Copyright
Copyright © Royal Aeronautical Society 1998 

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References

1. Adkins, R.C. and Pilidis, P. Advanced propulsion systems for STOVL aircraft, Internal Report, Unpublished, Cranfield Institute of Technology, 1987.Google Scholar
2. Aleid, L. A Performance Investigation of a Variable Cycle Gas Turbine for a High Speed Civil Transport, MSc thesis, Cranfield Institute of Technology, 1993.Google Scholar
3. Aleid, L. Variable Cycle Propulsion Systems For a Supersonic Civil Transport, Phd thesis, Cranfield University, 1997.Google Scholar
4. Aleid, L. and Pilidis, P. Variable cycle powerplants for a Mach 2.7 supersonic civil transport, ASME, Paper 96-GT-391.Google Scholar
5. Allen, R.D. Advanced supersonic propulsion system technology study, General Electric. NASA-CR-134913.Google Scholar
6. Anderson, B.H. Characteristic design study of mixed-compression two dimensional inlets with low-angle cowls for the Mach number range 1.8 to 2.7, NASA TN D-5330.Google Scholar
7. Do Nascimento, M.A.R. The Selective Bleed Variable Cycle Engine, Phd thesis, Cranfield Institute of Technology, 1992.Google Scholar
8. Do Nascimento, M.A.R. and Pilidis, P. The selective bleed variable cycle engine, ASME, Paper 91 -GT-388.Google Scholar
9. High Speed Civil Transport, Aeronautical Engineering Department California, Polytechnic State University, NASA-CR-192011.Google Scholar
10. Gammon, N. Aircraft Engine Design for Astovl Aircraft, MSc thesis, Cranfield Institute of Technology, 1988.Google Scholar
11. Palmer, J.R. The TURBOMATCH scheme for gas turbine performance calculations, Users’ Guide, Cranfield University, 1983.Google Scholar
12. Ulizar, I. and Pilidis, P. The handling of a variable cycle engine, the selective bleed turbofan, ASME, Paper 93-GT-384.Google Scholar
13. Ulizar, I. and Pilidis, P. Predicted performance characteristics of a variable cycle turbofan. Aeronaut J, June/July 1997, 101, (1006), pp 263–268.Google Scholar
14. Williams, D.D. Propulsion system performance and integration short course notes, Cranfield University, 1993.Google Scholar