Gas-dynamic DC pulse detonation combustion laser and methods of its implementation

Summary form only given. The research examines the feasibility of gas-dynamic laser incorporating new technical solutions. It is suggested to use separation of detonation products and air for drop-and-liquid fuel torch jet detonation in the process of their development in air environment, thus obtaining population inversion of gas molecule vibrational levels in an environment of increased density. The expected laser parameters are presented (for the detonation chamber volume of 10/sup -3/ m/sup 3/): - chemical energy source oil product light fractions (diesel fuel, kerosene) - max output power 20 kW (for 1% efficiency) - max working frequency 500 Hz - working frequency range 0-500 Hz - emission wavelength 10.6 /spl mu/m Chemical energy released in one cycle is about 4 kJ. Max temperature of combustion products will amount to 3,600 K, max pressure in the detonation chamber will be about 50 atmospheres. The efficiency is expected to be much higher than 1% due to the fact that during a powerful explosion, as shown by experimental data, about 15% of the explosion energy is transformed into emission. The process of fuel detonation combustion is used as a source of pressurizing the gas molecule vibrational level. The population inversion appears during the blast-wave release of reaction products from the detonation chamber. At the same time, the forward temperature decrease is over 3.5 times. Additionally, inversion is increased by the presence of oscillating excited molecules of nitrogen N* in the environment, these molecules being in metastable state, thus resulting in additional selective excitation of vibrational levels of CO/sub 2/ molecules during their collisions. The energy of an electric charge was used as a source to initiate detonation. Implementation of an electric charge in a limited space with a release opening proved that the blast wave intensity changes depending on the correlation of the charged cavity volume and geometric dimensions of the release openi- g for the same energy of the electric charge. This work served as a basis to create the method of obtaining high power blast waves with small energy electric charge due to forming a directional blast wave and using dynamic properties of gas flows.