High-mach-number low-temperature array nozzle used for HF/DF chemical laser

Abstract

The invention relates to a high-mach-number low-temperature array nozzle used for HF / DF chemical laser. The array nozzle comprises more than two nozzle assembling units which are arranged in parallel; a nozzle unit is formed between the two nozzle assembling units; the nozzle unit is a typical two-dimensional slit Laval nozzle; a row of hydrogen nozzle holes are formed in the wall surface of each of the nozzle assembling units on the two sides of the tail end of an outlet expansion section of the corresponding nozzle unit separately; a row of main helium nozzle holes are formed in the wall surface of each of the nozzle assembling units on the two sides of an outlet expansion section between the hydrogen nozzle holes and a throat-shaped channel separately; and a row of combustor helium nozzle holes are formed in the wall surface of each of the nozzle assembling units on the two sides of the inlet end of the corresponding nozzle unit separately. By adopting a high-mach-number low-temperature array nozzle design concept, the efficient fluorine atom freezing efficiency of the high-mach-number low-temperature nozzle is maintained; and by introducing a Russia novel nozzle combustor helium adding strategy, the thermal dissociation efficiency of the combustor is greatly improved.

Description

technical field [0001] The invention belongs to the field of HF / DF chemical laser nozzle design and is used for the nozzle design of HF / DF chemical laser. Background technique [0002] HF / DF chemical laser is one of the two most successful chemical lasers at present. The stimulated radiation of HF / DF chemical laser occurs in the vibration-rotational excited state of HF / DF molecules. The mainstream combustion-driven HF / DF chemical laser uses combustion method to pyrolyze to generate F atoms, and the generated F atoms pass through the supersonic nozzle. After cooling and accelerating with H 2 / D 2 The reaction generates HF / DF molecules in a vibrationally excited state and produces a population inversion at the rotational energy level. HF / DF laser output can be realized by selecting an appropriate coupling output cavity mirror. [0003] The key component of the HF / DF chemical laser is the supersonic nozzle. In the course of more than 40 years of development, with the conti...

AI Technical Summary

Problems solved by technology

However, the H2 injection strategy of the new Russian nozzle still adopts the free jet oblique addition method. This addition method has extremely high mixing efficiency, but it will cause a large loss of kinetic energy in the main nozzle, resulting in a higher pressure in the optical cavity. The higher temperature is not conducive to the increase of the light-emitting medium gain and the working pressure of the combustion chamber

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