Acoustic characterisation of a rectangular rocket combustor with liquid oxygen and hydrogen propellants

Abstract

High frequency combustion instabilities have plagued the development of liquid propellant rocket engines since their invention. Continuing research efforts aim to understand the mechanisms by which the oscillating combustion chamber pressure of self-sustaining combustion instabilities is driven. To this end, a rectangular combustor with acoustic forcing, designated ‘BKH’, was developed to study flame-acoustic interaction under conditions which are representative of real rocket engines. This article describes the acoustic characterisation of the BKH combustor using high frequency dynamic pressure measurements from the first hot-fire tests using liquid oxygen and ambient temperature or cryogenic hydrogen injectants. Analysis of the resulting high frequency pressure measurements shows excellent agreement with the predicted acoustic properties of the system which were calculated using finite element methods.

Keywords

Combustion instabilities rocket propulsion liquid propellant rocket engine acoustic resonance

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References

Harrje DT and Reardon FH. (eds) Liquid propellant rocket combustion instability. Washington, DC: NASA, 1972.

Yang V and Anderson W. (eds) Liquid rocket engine combustion instability. Washington, DC: AIAA, 1995.

Lecourt R and Foucaud R. Experiments on stability of liquid propellant rocket motors. In: Proceedings of the AIAA/SAE/ASME/ASEE 23rd joint propulsion conference, San Diego, CA, 29 June–2 July 1987. Reston, VA: American Institute of Aeronautics & Astronautics.

Cheuret

. Instabilités thermo-acoustiques de combustion haute-fréquence dans les moteurs fusées , Marseille: Institut de Recherche sur les Phénomènes Hors Équilibre, Université de Provence - Aix-Marseille, 2005.

Knapp B and Oschwald M. High speed visualization of flame response in a LOx/H2 combustion chamber during external excitation. In: Proceedings of the 12th international symposium on flow visualization, German Aerospace Centre (DLR), Gottingen, Germany, 10–14 September 2006.

Rey C, Ducruix S, Scouflaire P, et al. Experimental analysis of high frequency combustion instabilities associated with collective interactions. In: Proceedings of the PSFVIP-4, Chamonix, France, 3–5 June 2003.

Rey C, Ducruix S, Richecoeur F, et al. High frequency combustion instabilities associated with collective interactions in liquid propulsion. In: Proceedings of the 40th AIAA/ASME/SAE/ASEE joint propulsion conference & exhibit, Fort Lauderdale, FL, 11–14 July 2004, paper no. AIAA 2004-3518, pp.1–13. Reston, VA: AIAA.

Méry Y, Ducruix S, Scouflaire P, et al. Injection coupling with high amplitude transverse modes: experimentation and simulation. In: Proceedings of the 2nd Colloque INCA, Rouen, France, 23–24 October 2008, vol. 337, pp.426–437. New York, NY: Elsevier.

Richecoeur

Scouflaire

Ducruix

. High frequency transverse acoustic coupling in a multiple injector cryogenic combustor. J Propul Power 2006; 22(4): 790–799.

10.

Richecoeur

Ducruix

Scouflaire

. Effect of temperature fluctuations on high frequency acoustic coupling. Proc Combust Inst 2009; 32(2): 1663–1670.

11.

Oschwald

Farago

Searby

. Resonance frequencies and damping of a combustor acoustically coupled to an absorber. J Propul Power 2008; 24(3): 524–533.

12.

Searby

Nicole

Habiballah

. Prediction of the efficiency of acoustic damping cavities. J Propul Power 2008; 24(3): 516–523.

13.

Heidmann

Wieber

. Analysis of frequency response characteristics of propellant vaporization , Cleveland, OH: Lewis Research Centre, National Aeronautics and Space Administration, 1966.

14.

Gordon

McBride

. Computer program for calculation of complex chemical equilibrium compositions and applications. Part 1: analysis , Cleveland, OH: Glenn Research Center, National Aeronautics and Space Administration, 1994.

15.

Marble

Candel

. Acoustic disturbance from gas non-uniformities convected through a nozzle. J Sound Vib 1977; 55(2): 225–243.

16.

Welch

. The use of fast Fourier transform for the estimation of power spectra: a method based on time averaging over short, modified periodograms. IEEE Trans Audio Electroacoust 1967; 15(2): 70–73.

17.

Heinzel

Rüdiger

Schilling

. Spectrum and spectral density estimation by the Discrete Fourier Transform (DFT), including a comprehensive list of window functions and some new flat-top windows , Hannover, Germany: Max-Planck-Institut für Gravitationsphysik, 2002.

18.

Sutton

Biblarz

. Rocket propulsion elements , New York, NY: John Wiley & Sons, 2001.