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Temperature Oscillations in the Wall of a Cooled Multi Pulsejet Propeller for Aeronautic Propulsion
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 20, 2016 by SAE International in United States
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Environmental and economic issues related to the aeronautic transport, with particular reference to the high-speed one are opening new perspectives to pulsejets and derived pulse detonation engines. Their importance relates to high thrust to weight ratio and low cost of manufacturing with very low energy efficiency. This papers presents a preliminary evaluation in the direction of a new family of pulsejets which can be coupled with both an air compression system which is currently in pre-patenting study and a more efficient and enduring valve systems with respect to today ones. This new pulsejet has bee specifically studied to reach three objectives: a better thermodynamic efficiency, a substantial reduction of vibrations by a multi-chamber cooled architecture, a much longer operative life by more affordable valves. Another objective of this research connects directly to the possibility of feeding the pulsejet with hydrogen. This paper after a preliminary analysis of the pulsejet takes into account two necessary stages of this activity with the initial definition of the starting point of this activity, which aim to define an initial thermodynamic balance of a Lenoir cycle and a preliminary but effective estimation of the thermal problem. It analyses the heat transfer process through the wall of the combustion chamber of a pulsejet for aeronautic propulsion. The inside wall is exposed to burning gases with an average temperature of 1500 K, which oscillates with an amplitude 500 k and a frequency of 50 Hz. It has been considered the possibility of using Hydrogen injection to reduce the environmental impacts at the price of introducing a cooling water envelope at an average temperature of 80 °c. The water mass flow to ensure this condition has been evaluated and it has been evaluated both the average temperature profile within the wall and the effects of the oscillations of gas temperature inside the combustion chamber. Obtained results have allowed starting an effective activity through a radically new pulsejet architecture, which is expected to outclass any former pulsejet in term of operative life and of compression ratio with a consequent step increase in terms of thermodynamic efficiency.
CitationTrancossi, M., Pascoa, J., and Xisto, C., "Temperature Oscillations in the Wall of a Cooled Multi Pulsejet Propeller for Aeronautic Propulsion," SAE Technical Paper 2016-01-1998, 2016, https://doi.org/10.4271/2016-01-1998.
- Geng, T., Schoen, M. A., Kuznetsov, A. V. and Roberts, W. L., “Combined Numerical and Experimental Investigation of a 15-cm Valveless Pulsejet”. Flow, Turbulence and Combustion 78(1): 17-33, 2007. doi:10.1007/s10494-006-9032-8.
- Honecke, K., “Jet Engines: “Fundamentals of Theory, Design and Operation”. Shrewsbury : Airlife, 1997.
- Heywood, J. B., Internal Combustion Engine Fundamentals. New York: McGraw-Hill, 1988.
- Shavit A., and Gutfinger, C., “Thermodynamics from concepts to applications”, 2009. Second edition. New York: CRC Press, Taylor&Francis Group, ISBN 978-1-4200-7368-3.
- EDELMAN, L., "The Pulsating Jet Engine-Its Evolution and Future Prospects," SAE Technical Paper 470212, 1947, doi:10.4271/470212.
- Reynst F. H., “Pulsating Combustion”, Frankfurt/Main, Goethe-University, 1959.
- O'Brien, J, G., “The Pulsejet engine a review of its development potential”, Naval Postgraduate School, Monterey, CA, USA, 1973.
- VV.AA., Jane's Fighting Aircraft of World War II. London. Studio Editions Ltd, 1989. ISBN 0-517-67964-7
- Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9
- Zaloga, S., V-1 Flying Bomb 1942-52, Oxford, UK: Osprey Publishing, 2005. ISBN 978-1-84176-791-8.
- Mohammadi, A., Yaghoubi, M., Rashidi, M., Analysis of local convective heat transfer in a spark ignition engine, International Communications in Heat and Mass Transfer, 35, pp.215-224, 2008.
- Przybyla, G., Postrzednik, S., and Zmudka, Z., " The heat transfer coefficient calculation in the ICE cylinder based on ice pressure data", Journal of KONES Powertrain and Transport, Vol. 20, No. 4, 2013.
- Sandford, M. and Postlethwaite, I., "Engine Coolant Flow Simulation - A Correlation Study," SAE Technical Paper 930068, 1993, doi:10.4271/930068.
- Moeckel, M., "Computational Fluid Dynamic (CFD) Analysis of a Six Cylinder Diesel Engine Cooling System with Experimental Correlations," SAE Technical Paper 941081, 1994, doi:10.4271/941081.
- O’Brien, J. G., “The pulsejet engine a review of its development potential”, US Naval Postgraduate School, Monterey, California, USA, 1974
- Chaurasia, S. R.. Gupta R., and Sarviya, R. M., “Performance Analysis of a Pulsejet Engine”, International Journal of Engineering Research and Applications (IJERA), Vol. 3, Issue 4, pp.605-609, 2013, ISSN: 2248-9622.
- Winter Berger E., “Application of Steady and Unsteady Detona-tion Waves To Propulsion”, California Institute for Technology, 2004.
- Torda, P., et al., “Compressible Flow Through Reed Valves for Pulse Jet engines. 1. Hinged Reed Valves, Technical Report No. 9, Project 9, 1948.
- Gaiser, K., Paxson, D., T’ien J., “Improved Design of a Self-Actuated Valve for Pressure Gain Pulsejet Combustors”, Case Western Reserve University, 2010.
- Dumas A., Trancossi M., “A Mathematical Based Design Methodology for Crossflow Heat Exchangers”, ASME 2009 International Mechanical Engineering Congress and Exposition (IMECE2009), November 13-19, 2009 , Lake Buena Vista, Florida, USA, Paper no. IMECE 43826;, pp. 1159-1165, Volume 9: Heat Transfer, Fluid Flows, and Thermal Systems, Parts A, B and C, 2009. doi: 10.1115/IMECE2009-43826
- Dumas, A. and Trancossi, M., "Design of Exchangers Based on Heat Pipes for Hot Exhaust Thermal Flux, with the Capability of Thermal Shocks Absorption and Low Level Energy Recovery," SAE Technical Paper 2009-01-3074, 2009, doi:10.4271/2009-01-3074.