Share This Article:

Experimental Investigation on the Plasma Torch Used for Scramjet Ignition Enhancement

Abstract Full-Text HTML XML Download Download as PDF (Size:631KB) PP. 956-964
DOI: 10.4236/jamp.2015.38117    2,953 Downloads   3,333 Views   Citations

ABSTRACT

A high frequency arc discharge plasma torch was specially designed for ignition enhancement in scramjet combustor. At first, the process of plasma injection into quiescent air was investigated experimentally through CCD camera and schlieren technology. Then, the energy property characterization of active particle distribution was measured by emission spectrometry. Several kinds of working gas under different injection pressures were compared. Finally, the typical supersonic flow-field structure with plasma cross-injection was obtained. The results show that plasma jet energy is concentrated near the jet axis, which has the maximum attenuation in the downstream as far as 2 cm from the outlet. The working gas and injection pressure have great effect on emission spectrometry and the process of jet expansion. The case with N2 under higher injection pressure shows better performance of energy exchanging process when comparing with air and argon. From the emission spectroscopy, we can see that plasma from nitrogen consists of nitrogen and oxygen atom mainly, whose intensity decreases with increasing distance from the nozzle, while it increases with the increase of pressure. When plasma was vertically injected into supersonic flow-field, bow shock wave and mixing layer structure were formed with thicken mixing layer, which helps enhance the mixing process between active particle and incoming air.

Cite this paper

Zhong, W. , Xi, W. , Duan, L. , Xu, Q. and Li, Q. (2015) Experimental Investigation on the Plasma Torch Used for Scramjet Ignition Enhancement. Journal of Applied Mathematics and Physics, 3, 956-964. doi: 10.4236/jamp.2015.38117.

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1] Fry, R.S. (2004) A Century of Ramjet Propulsion Technology Evolution. Journal of Propulsion and Power, 20. http://dx.doi.org/10.2514/1.9178
[2] Law, C.K. (2006) Combustion Physics. Cambridge University Press. http://dx.doi.org/10.1017/CBO9780511754517
[3] Starikovskaia, S.M. (2006) Plasma Assisted Ignition and Combustion. J. Phys. D: Appl. Phys, 39, R265-R299. http://dx.doi.org/10.1088/0022-3727/39/16/r01
[4] Starikovskaya, S.M., Kukaev, E.N. and Kuksin, A.Y. (2004) Analysis of the Spatial Uniformity of the Combustion of a Gaseous Mixture Initiated by a Nanosecond Discharge. Combustion and Flame, 139, 177-187. http://dx.doi.org/10.1016/j.combustflame.2004.07.005
[5] Bozhenkov, S.A., Starikovskays, S.M. and Starikovskii, A.Y. (2003) Nanosecond Gas Discharge Ignition of H2 and CH4 Containing Mixtures. Combustion and Flame, 133, 133-146. http://dx.doi.org/10.1016/S0010-2180(02)00564-3
[6] Starikovskii, A.Y. (2005) Plasma Supported Combu-tion. Proceeding of the Combustion Institute, 30, 2405-2417. http://dx.doi.org/10.1016/j.proci.2004.08.272
[7] Aleksandrov, N.L., Kindysheva, S.V. and Kosarev, I.N. (2009) Mechanism of Ignition by Non-Equilibrium Plasma. Combustion and Flame, 32, 205-212. http://dx.doi.org/10.1016/j.proci.2008.06.124
[8] Kosarev, I.N., Aleksandrov, N.L. and Kindysheva, S.V. (2008) Kinetics of Ignition of Saturated Hydrocarbons by Nonequilibrium Plasma: CH4 Containing Mixtures. Combustion and Flame, 154, 569-586. http://dx.doi.org/10.1016/j.combustflame.2008.03.007
[9] Kosarev, I.N., Aleksandrov, N.L. and Kindysheva, S.V. (2009) Kinetics of Ignition of Saturated Hydrocarbons by Nonequilibrium Plasma: C2H6 to C5H12 Containing Mixtures. Combustion and Flame, 156, 221-233. http://dx.doi.org/10.1016/j.combustflame.2008.07.013
[10] Andrey Starikovskiy, N.A. (2013) Plasma-Assisted Ignition and Combustion. Progress in Energy and Combustion Science, 39, 61-110. http://dx.doi.org/10.1016/j.pecs.2012.05.003
[11] Pancheshnyi, S., Lacoste, D.A., Bourdon, A. and Laux, C.O. (2005) Ignition of Propane-Air Mixtures by Repetitively Pulsednanosecond Gas Discharges. Proc. 17th Int. Symp. on Plasma Chemistry, Toronto, 7-12 August 2005.
[12] Takita, K. (2002) Ignition and Flame-Holding by Oxygen, Nitrogen and Argon Plasma Torches in Supersonic Airflow. Combust. Flame, 128, 301-313. http://dx.doi.org/10.1016/S0010-2180(01)00354-6
[13] Bozhenkov, S.A., Starikovskaia, S.M. and Starikovskii, A.Yu. (2003) Nanosecond Gas Discharge Ignition of H2- and CH4-Containing Mixtures. Combust. Flame, 133, 133-146. http://dx.doi.org/10.1016/S0010-2180(02)00564-3

  
comments powered by Disqus

Copyright © 2020 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.