High-Mach-number low-temperature spray tube for HF/DF chemical laser

Abstract

The invention relates to a high-Mach-number low-temperature spray tube for HF / DF chemical laser, and belongs to the field of HF / DF chemical laser spray tube design. A Russian newest unit segmentation scheme of the HF / DF chemical laser spray tube is employed, ultrasonic and ultrasonic mixed concepts of a traditional high-Mach-number low-temperature spray tube are introduced, and the flow whirlpool technology of RAMP and DEFLECTOR spray tubes is used. The high-Mach-number low-temperature spray tube for HF / DF chemical laser has the advantages that high mach number can be realized in a larger throat channel of the spray tube, processing is simple, influence of thermal deformation on the throat channel in the operation process is greatly reduced, and the service life of the spray tube is prolonged; the penetration length needed by injecting H2 air flow into a main spray tube is greatly reduced, and the mixing efficiency is higher; and the temperature and pressure of an optical cavity are lower, the gain of the optical cavity and the work pressure of a combustion room are greatly improved, and the volume efficiency, energy flow density and specific power of HF / DF chemical laser are 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, it reacts with H2 / D2 to generate vibrationally excited HF / DF molecules and produces population inversion on the rotational energy level. By selecting an appropriate coupling output cavity mirror, the multispectral HF / DF laser output can be realized. [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 cont...

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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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