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

A high Mach number, chemical laser technology, used in laser parts and other directions, can solve the problems of increased working pressure of the combustion chamber, unfavorable light output medium gain, loss of kinetic energy of the main nozzle, etc., to improve the gain, improve thermal dissociation efficiency, The effect of narrow boundary surface layer

Active Publication Date: 2017-06-13
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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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 ener

Method used

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

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Embodiment

[0038] According to the design idea of ​​the present invention, the following nozzles have been designed, and the nozzle assembly unit and the nozzle array assembly diagram are as follows:

[0039] Among them, the Mach number design value of the nozzle is 5.5; each nozzle unit is composed of two adjacent nozzle assembly units, the throat height is 0.2mm, and the profile dimensions of the inlet constriction section and outlet expansion section are determined by the hydrodynamic Calculated by the software, the outlet height is 9.5 mm; the distance between the hydrogen nozzle holes is 5 mm, and the center line of the hydrogen nozzle holes is parallel to the throat slit; the throat part of the hydrogen nozzle holes is a round hole with a diameter of 0.3 mm, and the outlet end is Circular conical hole with a diameter of 1mm at the exit; the main helium nozzle is just behind the hydrogen nozzle in the direction of the air flow, and the distance between the main helium nozzle and the ...

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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...

Claims

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Application Information

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IPC IPC(8): H01S3/02
CPCH01S3/02
Inventor 唐书凯多丽萍金玉奇桑凤亭王元虎于海军李留成王增强李国富汪健曹靖康元福
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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