Engineering & Technology

Engineering & Technology

Optimum Line of High Bypass Twin Spool Separated Flow Turbofan Engine

Pages: 5  ,  Volume: 12  ,  Issue: 1 , September   2018
Received: 17 Sep 2018  ,  Published: 23 September 2018
Views: 39  ,  Download: 27

Authors

# Author Name
1 Phyo Wai Thaw, Zin Win Thu, Than Swe

Abstract

Today’s modern aircraft is based on air-breathing jet propulsion systems, which use moving fluids as substances to transform energy carried by the fluids into power. Throughout aero-vehicle evolution, improvements have been made to the engine performances and pollutants reduction. These goals were achieved by changing of the bypass ratio (B), fan pressure ratio (Pf), overall pressure ratio (OPR), turbine inlet temperature (TIT) as well as using new materials, production and cooling techniques for both turbines and combustion chamber. Such modifications led to improvements in thermal, propulsive and overall efficiencies, decreases in thrust specific fuel consumption (TSFC) and increase the specific thrust. This paper describes an optimization of a twin spool, separated flow, high bypass turbofan engine and focuses on maximum specific thrust (Fs) with optimum specific fuel consumption (SFC). The two variables, fan pressure ratio (Pf) and bypass ratio (B), were selected as ranges of 1.2-1.9 and 5-8. After that optimum line was investigated that connects the points of maximum Fs and optimum SFC in these ranges that shows optimum engine performance.

Keywords

References

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[14]     Rolls-Royce plc, The Jet Engine, Fifth edition, 1996.

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[1]        A. Gohardani, S. Georgios, and R. S. Doulgeris, Challenges of future aircraft propulsion: A review of distributed propulsion technology and its potential application for the all electric commercial aircraft, Progress in Aerospace Sciences, vol. 47, no. 5, pp. 369-391. 2010.

[2]        A. Schafer and D. G. Victor, The past and future of global mobility, Scientific American, pp. 36-39, 1997. 

[3]        IPCC, IPCC special report on aviation and the global atmosphere, Intergovernmental Panel on Climate Change, 1999.

[4]        J. H. Aylesworth, Global Atmospheric Effects of Aviation: A Policy Perspective, Aerospace Industries Association of America, 1996.

[5]        T. Grönstedt, C. Xisto, V. Sethi, A. Rolt, N. G. Rosa, A. Seitz, K. Yakinthos, S. Donnerhack, P. Newton, N. Tantot, O. Schmitz and A. Lundbladh, Ultra Low Emission Technology Innovations for Mid-Century Aircraft Turbine Engines, in ASME Turbo EXPO 2016, Seoul, South Korea, 2016.

[6]        T. Grönstedt, M. Irannezhad, X. Lei, O. Thulin and A. Lundbladh, First and Second Law Analysis of Future Aircraft Engines, Journal of Engineering for Gas Turbines and Power, vol. 136, no. 3, pp. 031202031202-10, 2014.

[7]        Andrew Rolt, Vishal Sethi, Florian Jacob, Joshua Sebastiampillai, Scale Effects on Conventional and Intercooled Turbofan Engine Performance, Aeronautical Journal, Vol. 121, Issue 1242, August 2017, pp. 1162-1185.

[8]        K.H. Liew, E. Urip, and S.L. Yang, A Parametric Cycle Analysis of a Separate-Flow Turbofan With Interstage Turbine Burner, NASA/CR—2005-213657, AIAA–2004–3311.

[9]        Yashovardhan S. Chati and Hamsa Balakrishnan, Aircraft Engine Performance Study Using Flight Data Recorder Archives, Massachusetts Institute of Technology, Cambridge, Massachusetts, 02139, USA.

[10]     Dimitri Papamoschou, New Method for Jet Noise Reduction in Turbofan Engines, AIAA Vol. 42, No. 11, November 2004.

[11]     Ahmed F. El-sayed, Mohamed S. Emeara, Mohamed A. El-habet, Performance Analysis of High Bypass Ratio Turbofan Aeroengine, International Journal of Development Research Vol. 06, Issue, 07, pp.8382-8398, July, 2016.

[12]     Dennis L. Huff, Noise Reduction Technologies for Turbofan Engines, NASA/TM—2007-214495, September 2007.

[13]     Robert Jakubowski, Analysis of Turbofan Engine Design Modification to Add Inter-Turbine Combustor, Journal of KONES Powertrain and Transport, Vol. 22, No. 3 2015.

[14]     Rolls-Royce plc, The Jet Engine, Fifth edition, 1996.

[15]     Ahmed F. El-Sayed, Fundamentals of Aircraft and Rocket Propulsion, Springer-Verlag London 2016.

[16]     Jack D. Mattingly, Elements of Propulsion: Gas Turbines and Rockets, foreword by Hans von Ohain.

[17]     H Cohen, GFC Rogers, HIH Saravanmuttoo, Gas Turbine Theory, fifth edition.