Extended Second Law Analysis for Turboramjet Engines

Öz

Turbine based combined cycles (TBCC) monopolizes the benefits from the two different thermodynamic cycle configurations involved. The TBCC, which is based on an irreversible Brayton cycle, considered in this study is a wraparound configuration turboramjet engine. The turboramjet can be utilized in either turbojet (afterburner (AB) being ON or OFF), ramjet and even dual mode operation. However, for the dual mode operation the turbojet engine AB are considered to be ON. In addition, the ramjet thermodynamic assessment considers multi-oblique shock and single normal shock solution and Rayleigh flow calculation for the combustion chamber. The performance analysis and comparison for the turboramjet engine for dual mode operation is based on a maximum power approach under variations of Mach number and altitude. Moreover, the dual mode operation considered variations of inlet air mass flow; the split of air mass flow between the turbojet and ramjet. In addition, a brief comparison is provided of the turbojet while the afterburner is in ON or OFF mode utilizing the maximum power, EPLOS and PLOS optimization functions for variations of altitude and Mach number. Moreover, a component based evaluation under maximum power conditions for variation of Mach number is provided. The turbojet with an AB shows greater advantage at Mach number higher than unity as well as attaining maximum power outputs at minimum PLOS for lower compressor ratio parameters (θ_c). Whereas the turboramjet indicates that as the split of inlet air mass flow to the ramjet is increased beyond 50% the advantage in terms of η_th, η_o, f, TSFC, I_a, thrust and ν_NOZZLE far supersede that of the turbojet with an AB.

Anahtar Kelimeler

• Brayton Cycle
• TBCC
• Propulsion
• Performance
• Maximum Power
• EPLOS
• PLOS

Kaynakça

1. Şöhret Y., Ekici S. and Karakoç T. H. (2017). Using Exergy for Performance Evaluation of a conceptual Ramjet Engine Burning Hydrogen Fuel, International Journal of Hydrogen Energy, XXX I-6. https://doi.org/10.1016/j.ijhydene.2017.12.060
2. Latypov A. F. (2009). Exergy Analysis of Ramjet, Thermophysics and Aeromechanics, Vol. 16, No. 2. https://doi.org/10.1134/S0869864309020152
3. Latypov A. F. (2013). Exergy Method for Estimating the Ramjet Specific Impulse, Thermophysics and Aeromechanics, 2013, Vol. 20, No. 5. https://doi.org/10.1134/S0869864313050023
4. Ayaz S. K. and Altuntaş Ö. (2017). Assessment of Ramjet Engine for Different Mach Numbers, International Journal of Sustainable Aviation, Vol. 3, No. 4. https://doi.org/10.1504/IJSA.2017.090299
5. Moorhouse D. J. (2003). Proposed System-Level Multidisciplinary Analysis Technique Based on Exergy Methods, Journal of Aircraft, Vol. 40, No. 1, January – February. https://doi.org/10.2514/2.3088
6. Moorhouse D. J. and Suchomel C. F. (2001). Exergy Method Applied to the Hypersonic Vehicle Challenge, AIAA paper # 2001 – 3063.
7. Moorhouse D. J., Hoke C. M. and Prendergast J. P. (2002). Thermal Analysis of Hypersonic Inlet Flow with Exergy-Based Design Methods, International Journal of Thermodynamics, vol. 5 (No. 4), pp. 161-168, December.
8. Marley C. D. and Riggins D. W. (2011). The Thermodynamics of Exergy Losses and Thrust Production in Gas Turbine Engines, AIAA, 2011-6130.

9. Ispir A. C., Gonçalves P., Kurban E. And Saraçoğlu B. H. (2020). Thermodynamic Efficiency Analysis and Investigation of Exergic Efficiencies of STRATOFLY MR3 Aircraft Propulsion Plant, AIAA SciTech Forum, 6-10 January.
10. Ehyaei M. A., Anjiridezfuli A. And Rosen M. A. (2013). Exergic Analysis of an Aircraft Turbojet Engine with an Afterburner, Thermal Science, Vol. 17, No. 4, pp 1181-1194. https://doi.org/10.2298/TSCI110911043E
11. Roth B. and Marvis D. (2000). A Method for Propulsion Technology Impact Evaluation via Thermodynamic Work Potential, AIAA 2000-4854.
12. Camberos J. A. And Moorhouse D. J. (2011). Exergy Analysis and Design Optimization for Aerospace Vehicles and Systems, AIAA, Vol. 238, Progress in Astronautics and Aeronautics.
13. Hayes D., Lone M. and Whidborne J. F., Camberos J. and Coetzee E. (2017). Adopting exergy analysis for use in aerospace, Progress in Aerospace Sciences xxx 1–22. https://doi.org/10.1016/j.paerosci.2017.07.004
14. Riggins D. W. and Taylor T. (2006). Methodology for Performance Analysis of Aerospace Vehicles Using the Laws of Thermodynamics, JOURNAL OF AIRCRAFT, Vol. 43, No. 4, July–August. https://doi.org/10.2514/1.16426 Balli Ö. (2017). Advanced exergy analyses to evaluate the performance of a military aircraft turbojet engine (TJE) with afterburner system: Splitting exergy destruction into unavoidable/avoidable and endogenous/exogenous, Applied Thermal Engineering 111 152–169. https://doi.org/10.1515/tjj-2016-0074
15. Balli Ö. (2017). Exergetic, Exergoeconomic, Sustainability and Environmental Damage Cost Analyses of J85 Turbojet Engine with Afterburner, International Journal of Turbo & Jet Engines. https://doi.org/10.1515/tjj-2017-0019
16. Balli Ö. (2014). Afterburning effect on the energetic and exergetic performance of an experimental turbojet engine (TJE), International Journal of Exergy, January. https://doi.org/10.1504/IJEX.2014.060278
17. Akkaya A.V., Şahin B. and Erdem H.H. (2007). Exergetic performance coefficient analysis of a simple fuel cell system, International Journal of Hydrogen Energy 32 4600 – 4609. https://doi.org/10.1016/j.ijhydene.2007.03.038
18. Yüksel B., Balli Ö., Günerhan H. and Hepbaslı A. (2020). Comparative Performance Metric Assessment of a Military Turbojet Engine Utilizing Hydrogen and Kerosene Fuels Through Advanced Exergy Analysis Method, Energies, 13, 1205. https://doi.org/10.3390/en13051205
19. Balli Ö., Adak İ. and Güneş S. (2017). Afterburner Effect on the Energetic and Exergetic Performance of J79-GE-17 Engine with Afterburner System used on F-4 Phantom II Aircrafts, International Symposium on Sustainable Aviation (ISSA-2017), Kiev, Ukraine, 10 – 13 September.
20. Akkaya A.V., Şahin B. and Erdem H.H. (2008). An analysis of SOFC/GT CHP system based on exergetic performance criteria, International Journal of Hydrogen Energy 33 2566 – 2577. https://doi.org/10.1016/j.ijhydene.2008.03.013
21. Bastani M., Jafari R. and Ghasemi H. (2015). Exergy Analysis of an Aircraft Turbojet Engine, International Journal of Engineering Sciences & Research Technology, ISSN: 2277-9655, April.
22. Yüksel B., Günerhan H. and Hepbaslı A. (2020). Assessing Exergy-Based Economic and Sustainability Analyses of a Military Gas Turbine Engine Fueled with Various Fuels, Energies, 13, 3823. https://doi.org/10.3390/en13153823
23. Niknamian S. (2020). The optimization of a jet turbojet engine by PSO and searching algorithms, Social Science Research Network, https://ssrn.com/abstract=3503740, January. https://doi.org/10.35877/454RI.asci3195
24. Sürer M.G. and Arat H.T. (2018). A Critical Review of Exergy Studies on Jet Engines, 16th International Conference on Clean Energy (ICCE-2018), May.
25. Dong Z., Li D., Wang Z. and Sun M. (2018). A Review on Exergy Analysis of Aerospace Power Systems, Acta Astronautica, AA 7090, S0094-5765(18)31012-9, September. https://doi.org/10.1016/j.actaastro.2018.09.003
26. Noori F., Gorji M., Kazemi A. and Nemati H. (2015). Thermodynamic optimization of ideal turbojet with afterburner engines using non-dominated sorting genetic algorithm II, Journal of. Aerospace Engineering, Proc. IMechE Vol. 224 Part G, February. https://doi.org/10.1243/09544100JAERO771
27. Nasab M.R.A. and Ehyaei M.A. (2019). Optimization of turbojet engine cycle with dual-purpose PSO algorithm, Mechanics & Industry 20, 604, March. https://doi.org/10.1051/meca/2019029
28. Liu, Y., Mo, D. and Wu, Y. (2023). Design of Hypersonic Variable Cycle Turboramjet Engine Based on Hydrogen Fuel Aiming at 2060 Carbon Neutralization. The Proceedings of the 2021 Asia-Pacific International Symposium on Aerospace Technology (APISAT 2021), Volume 2. APISAT 2021. Lecture Notes in Electrical Engineering, vol 913. Springer, Singapore. https://doi.org/10.1007/978-981-19-2635-8_85
29. Rajashankar S., Ananthkrishnan N., Sharma A., Lee J. and Namkoung H.J. (2024). Turbojet Module Sizing for Integration with Turbine-Based Combined Cycle Engine, Cornell University, Physics, Fluid Dynamics, arXiv:2406.19472v1 [physics.flu-dyn] 27 Jun 2024. https://doi.org/10.48550/arXiv.2406.19472
30. Xi Z., Zhang H., Chen M., Cai C. and Wang J. (2023). Design of thrust augmentation control schedule during mode transition for turbo-ramjet engine, Aerospace Science and Technology Volume 138, July 2023, 108352 https://doi.org/10.1016/j.ast.2023.108352
31. Lockheed Martin SR-72, "Son of Blackbird" (2024). https://en.m.wikipedia.org/wiki/Lockheed_Martin_SR-72 https://www.youtube.com/watch?v=vFMIQOMaUXI
32. Fawal S. and Kodal A. (2019). Comparative performance analysis of various optimization functions for an irreversible Brayton cycle applicable to turbojet engines, Energy Conversion and Management, 199 111976. https://doi.org/10.1016/j.enconman.2019.111976
33. Fawal S. and Kodal A. (2021). Overall and Component Basis Performance Evaluations for Turbojet Engines Under Various Optimal Operating Conditions, Aerospace Science and Technology 117 106943. https://doi.org/10.1016/j.ast.2021.106943
34. MIL-E-5007D (1973). General Specification for Engines, Aircraft, Turbojet and Turbofan, Military Specification, Department of the Air Force, Wright-Paterson AFB, OH, September.
35. Keith T.G. and John J.E. (2006). Gas Dynamics, Third Edition, Pearson, Prentice Hall, Upper Saddle River, NJ.
36. El-Sayed A.F. (2016). Fundamentals of Aircraft and Rocket propulsion, Department of Mechanical Engineering, Zagazig University, Zagazig, Egypt, Springer-Verlag London.
37. Mattingly J. D. (1996). Elements of Gas Turbine Propulsion, TATA McGraw-Hill Edition.
38. Farokhi S. (2014). Aircraft Propulsion, 2nd Edition, Wiley.