Nikiforov
Vladimir O.
D.Sc., Prof.
doi: 10.17586/2226-1494-2016-16-5-764-772
MODEL OF LASER INTERACTION WITH LIQUID DROPLET
Read the full article ';
For citation: Volkov K.N., Bulat P.V., Ilina E.E. Model of laser interaction with liquid droplet. Scientific and Technical Journal of Information Technologies, Mechanics and Optics, 2016, vol. 16, no. 5, pp. 764–772. doi: 10.17586/2226-1494-2016-16-5-764-772
Abstract
Subject of Research. A mathematical model of optical breakdown in the dielectric liquid droplets when exposed to pulsed laser radiation was developed. The process is considered in several stages: heating, evaporation of the particle, forming a steam halo, ionization of the steam halo. Numerical study was carried out on the basis of the mathematical model to determine the threshold characteristics of the laser pulse. Main Results.Distributions of pressure, density and temperature of the particle steam halo were obtained by means of a calculation. The temperature field around the liquid droplet was determined. It has been found that at high energies in the gas bubble, the conditions are provided for thermal gas ionization and start of the electron avalanche, leading to plasma formation. Due to the volumetric heat generation, the droplet is overheated and is in a metastable state. The plasma cloud is almost opaque to radiation that causes an abrupt increase of temperature. As a result, an explosion occurs inside the droplet with the formation of a shock wave that is propagating outward. Practical Relevance.The results can be used to assess the performance of high-power laser scanning (LIDAR) under the presence of liquid droplets in the atmosphere and other suspensions. Lasers can be used in fire and explosion aerospace systems. Obtained findings can be applied also in the systems of laser ignition and detonation initiation.
Acknowledgements. This work was financially supported by the Ministry of Education and Science of the Russian Federation (agreement No. 14.578.21.0111, a unique identifier RFMEFI57815X0111 for Applied Scientific Research).
References
1. Zuev V.E., Kopytin Yu.D., Kuzikovskii A.V. Nonlinear Optical Effects in Aerosols. Novosibirsk, Nauka Publ., 1980, 184 p. (In Russian)
2. Kopytin Yu.D., Sorokin Yu.M., Skripkin A.M. et. al. Optical Discharge in Aerosols. Novosibirsk, Nauka Publ., 1990, 159 p.
3. Pogodaev V.A., Rozhdestvenskii A.E. Vzryv i opticheskii proboi slabopogloshchayushchikh vodnykh aerozolei v moshchnom svetovom pole. Technical Physics. The Russian Journal of Applied Physics, 1984, vol. 53, no. 8, pp. 1541–1546.
4. Bulat P., Volkov K. Simulation of detonation in particulate systems with applications to pulse detonation engines. Proc. 7th European Combustion Meeting. Budapest, Hungary, 2015, art. 4252.
5. Volkov K.N., Emelyanov V.M. Interaction of intensive flux of radiation with gas-dispersed system. Matematicheskoe Modelirovanie, 2003, vol. 15, no. 6, pp. 35–40.
6. Kopecek H., Maier H., Reider G., Winter F., Winther E. Laser ignition of methane-air mixtures at high pressures. Experimental Thermal and Fluid Science, 2003, vol. 27, no. 4, pp. 499–503. doi: 10.1016/S0894-1777(02)00253-4
7. Volkov K.N., Emelyanov V.N., Solong L. Heat and mass transfer in gas-disperse systems exposed to intense radiation. Heat Transfer Research, 2003, vol. 34, no. 5-6, pp. 332–343.
8. Loskutov V.S., Strelkov G.M. About the explosive evaporation of water droplets under the action of laser pulses at 1.06 and 2.36 microns. Optics and Spectroscopy, 1982, vol. 53, no. 5, pp. 888–892.
9. Geints Yu.E., Zemlyanov A.A., Zuev V.E., Kabanov A.M., Pogodaev V.A. Nonlinear Optics of Atmospheric Aerosol. Novosibirsk, SO RAS Publ., 1999. (In Russian)
10. Nigmatulin R.I. Dynamics of Multiphase Environments. Part 1. Moscow, Nauka Publ., 1987, 466 p. (In Russian)
11. Skripov V.P. Metastable Liquid. Moscow, Nauka Publ., 1972, 280 p. (In Russian)
12. Koroteev N.I., Shumai I.L. Physics of High-Power Laser Radiation. Moscow, Nauka Publ., 1991, 312 p. (In Russian)
13. Godunov S.K., Zabrodin A.V., Ivanov M.Ya., Kraiko A.N. Numerical Simulation of Multi-Dimensional Problems of Gas Dynamics. Moscow, Nauka Publ., 1976, 400 p. (In Russian)
14. Bulat P.V., Volkov K.N. Arbitrary interaction of plane supersonic flows. Scientific and Technical Journal of Information Technologies, Mechanics and Optics, 2015, vol. 15, no. 6, pp. 1155–1168. doi: 10.17586/2226-1494-2015-15-6-1155-1168
15. Azarov M.A., Drozdov V.A., Igoshin V.I., Kurov A.Yu., Petrov A.L., Pichugin S.Yu., Troshchinenko G.A. Formation and experimental investigation of a gaseous disperse medium of a pulsed chemical H2-F2 laser initiated by IR radiation. Soviet Journal of Quantum Electronics, 1997, vol. 27, no. 11, pp. 953–956.