2014 1(14)

Back to table of content

   Short abstract

 

Pages:

3 - 9

Language:

RU

Ref.:

6


Click to get extended abstract


Download paper: [RU]

2014_1(14)_1.pdf

 

 

THE SUPERSONIC AIR FLOW STRUCTURE AND PARAMETERS IN OPTICAL BREAKDOWN ZONE FOR HIGH FREQUENCY ENERGY PULSES

Bobarykina T.A., Chirkashenko V.F., Yakovlev V.I.

Khristianovich Institute Of Theoretical And Applied Mechanics SB RAS, Novosibirsk, Russia


Citation:

Bobarykina, T.A., Chirkashenko, V.F. and Yakovlev, V.I., (2014) The supersonic air flow structure and parameters in optical breakdown zone for high frequency energy pulses, Modern Science: Researches, Ideas, Results, Technologies, Iss. #1(14), PP. 3 - 9.


Keywords:

supersonic air flow; high-power pulse-periodic CO2-laser; the optical breakdown of air; shock-wave flow structure


Abstracts:

The shock-wave flow structure was determined by the results of the optical and pneumo-metric measurements; this structure forms at the optical breakdown realized by the focused pulse-periodical radiation of the СО2-laser as the air supersonic flow is injected perpendicularly toward it. The dynamics of the head shock wave formation in front of the energy-release area regarding the energy pulses repetition frequency is shown. The flow structure in the thermal wake behind the pulsing laser plasma is found, as well as the length of the thermal wake with low temperature nonuniformity. The size of the 3D configuration of the energy-release area was determined by the results of the optical and pneumo-metric measurements. Pioneering results show that the stagnation pressure and Mach number decrease in the thermal wake as the static pressure remains almost constant. Slight dependence of the averaged flow parameters on the energy pulses frequency within the range of 45 – 150 kHz is demonstrated.


References:

  1. Garanin, A.F., Tretyakov, P.K., Chirkashenko, V.F., Yudinstev, IU.N. (2001), "Shock waves control by means of mass and energy supply", Izvestiya RAN., Fluid Mechanics, no.5, pp. 186-193.

  2. Georgievskiy, P. IU. (2003). "Control of supersonic flow past bodies by local energy deposition upstream", Abstract of Ph.D. dissertation, Institute of mechanics, Moskow, Russia.

  3. Tretyakov, P.K., Garanin, A.F., Grachev, G.N., Kraynev, V.L., Ponomarenko A.G., Ivanchenko, A.I. and Yakovlev, V.I. (1996). "Control of a supersonic flow about the bodies by means of high-power optical pulse discharge", DAN, Vol. 351, no.3, pp. 339-340.

  4. Malov, A.N. and Orishich, A.M. (2012), "Formation of an optical pulsed discharge in a supersonic air flow by radiation of a repetitively pulsed CO2 laser", Kvantovaya elektronika, Vol.42, no.9, pp. 843-847.

  5. Zvegintsev, V.I. (2003), Aerodynamic model facility", Otchet ITPM SO RAN, Novosibirsk, No.3 - 03.

  6. Chirkashenko, V.F. (2013). "Method of supersonic nonisentropic flow parameters measuring", Izmeritelnaya tekhnika, no.2, pp.26-32.

 

 
     

© SPIC "Kappa", LLC 2009-2016