On ramjet parameters selection, ensuring a cruising flight specified mode

Fluid, gas and plasma mechanics


Аuthors

Borisov A. D.*, Vasiutichev A. S.**, Laptev I. V.***

Keldysh Research Centre, 8, Onezhskaya str., Moscow, 125438, Russia

*e-mail: a-d-borisov@yandex.ru
**e-mail: aleksey.vas@mail.ru
***e-mail: laptev.iv.kerc@gmail.com

Abstract

The main feature of ramjets is direct link between parameters inside the propulsion system and parameters of the incoming airflow, which in its turn determines the aerodynamic forces acting on the flying vehicle. Thus, the process of ramjet development is inseparable from the flying vehicle developing as a whole. The flying vehicle layout scheme selection requires considering large number of different options. While developing a new scheme, engineers are generally guided by the existing prototypes and/or analogues. Determining the flow path cross-sections of the propulsion system; fuel reserve and the way of acceleration to the ramjet starting point; control ranges and other parameters is performed while their optimization process along flight trajectories with given restrictions (above all, size and weight).

A large number of parameters determining the flying vehicle flight and the performance characteristics of its propulsion system, their significant effect on each other complicate analyzing the quality of the selected scheme The article presents an engineering technique allowing coordinating and optimizing the parameters of the propulsion system and the vehicle that provide a given cruise flight mode.

Parametric calculations were performed for a 600 mm in diameter flying vehicle. The dependence of thrust and specific impulse on relative inlet area and excess air ratio are presented.

The developed technique is being applied for preliminary determining the acceleration and cruising parameters of a ramjet.

Keywords:

ramjet, flying vehicle, cruise flight, optimization

References

  1. Fry R.S. A Century of Ramjet Propulsion Technology Evolution, Journal of Propulsion and Power, 2004, vol. 20, no. 1, pp. 27 – 58.

  2. Aleksandrov V.N., Bytskevich V.M., Verkholomov V.K. i dr. Integral’nye pryamotochnye vozdushno-reaktivnye dvigateli na tverdykh toplivakh. Osnovy teorii i rascheta (Integral solid fuel ramjets. Theory and calculation fundamentals), Moscow, Akademkniga, 2006, 343 p.

  3. Lebedev A.A., Chernobrovkin L.S. Dinamika poleta bespilotnykh letatel’nykh apparatov (Unmanned aerial vehicles flight dynamics), Moscow, Mashinostroenie, 1973, 616 p.

  4. Karasiov V.N., Levin V.M. Trudy MAI, 2013, no 64, available at: http://trudymai.ru/eng/published.php?ID=36551

  5. Escher W.J.D., Foreman K.M. Major ramjet programs in the U.S., ISABE Paper 2003-1072, 2003, pp. 1 – 56.

  6. Hewitt P. Status of Ramjet Programs in the United States, AIAA Paper 2008-5265, 2008, pp. 1 – 10.

  7. Verstraete D., Palmer J.L., Hornung M. Preliminary Sizing Correlations for Fixed-Wing Unmanned Aerial Vehicle Characteristics, Journal of Aircraft, 2018, vol. 55, no. 2, pp. 715 – 726.

  8. Ahuja V., Hartfield R.J. Optimization of Combined Rocket and Ramjet/Scramjet Ballistic Missile Designs, Journal of Propulsion and Power, 2015, vol. 31, no. 6, pp. 1544 – 1550

  9. Ananyev A.V., Borisov D.M., Vasiutichev A.S., Gidaspov V.Y., Degtyaryov S.A., Laptev I.V., Rudenko A.M. Vestnik Moskovskogo aviatsionnogo instituta, 2009, vol. 16, no. 2, pp. 131 – 140.

  10. Petters D.P., Leingang J.L. Rapid computer simulation of ramjet performance, AIAA Paper 1993-2049, 1993, pp. 1 – 8.

  11. Ananyev A.V., Borisov D.M., Laptev I.V. Vestnik Moskovskogo aviatsionnogo instituta, 2011, vol. 18, no. 5, pp. 42 – 48.

  12. Brilliant H.M. Analysis of Scramjet Engines Using Energy Methods, AIAA Paper 1995-2767, 1995, pp. 1 – 12.

  13. Suncov P.S., Lukovnikov A.V., Fokin D.B. Trudy MAI, 2011, no 46, available at: http://trudymai.ru/eng/published.php?ID=26090

  14. Riggins D.W., McClinton CR. Thrust Modeling for Hypersonic Engines, AIAA Paper 1995-6081, 1995, pp. 1 – 18

  15. Varshavskij G.A., Guber E.YA., Kiselyov A.P. K voprosu o termodinamike ravnovesnyh techenij gazovyh smesej obrazovannyh soedineniyami C, H, N, O. Trudy TsAGI, no. 978 (On the thermodynamics of equilibrium flows of gas mixtures formed by compounds C, H, N, O. Proceedings of TsAGI, no. 978), Moscow, Byuro nauchnoi informacii TsAGI, 1966, 69 p.

  16. Angelucci S., Roffe G., Baronti P. The single throat ramjet and its application to cruising and accelerating systems, AIAA Papers 1979-7043, 1979, pp. 1 – 10.

  17. Huang S., Tan Y., Li X.-D., Ren H., Li H. Quasi-one-dimensional analysis on thrust performance of ramjet and scramjet, AIAA Paper 2017-2166, 2017, pp. 1 – 10.

  18. Borisov A.D. Trudy MAI, 2016, no 90, available at: http://trudymai.ru/eng/published.php?ID=74721

  19. Smith N.K., Good W.D. Enthalpies of Combustion of Ramjet Fuels, AIAA Journal, 1979, vol. 17, no. 8, pp. 905 – 907.

  20. Drela M. Flight vehicle aerodynamics. Cambridge, Massachusetts: The MIT Press, 2014. 304 p.


Download

mai.ru — informational site MAI

Copyright © 2000-2021 by MAI

Вход