Impact-reflective injectors for generating low-velocity smoke screens in space environments

Abstract

The invention provides an impact reflection type ejector for producing a low-speed smoke screen in a space environment. The ejector comprises a mixing chamber, ejecting pieces and an expanding piece; the mixing chamber comprises a mixing chamber outlet and multiple mixing chamber inlets; the mixing chamber outlet and the mixing chamber inlets are formed in the outer wall of the mixing chamber and are located on the same side; the mixing chamber inlets are evenly distributed in the circumferential direction relative to the central axis of the mixing chamber outlet; the number of the ejecting pieces is identical with that of the mixing chamber inlets; one end of each ejecting piece penetrates through the corresponding mixing chamber inlet in a sealed manner and is inserted in an inner cavity of the mixing chamber; the other end of each ejecting piece is connected with an external supply system for supplying mixtures of smoke screen particles and gases; the central axes of the ejecting pieces intersect at one point in the inner cavity of the mixing chamber; the expanding piece comprises a neck part connected with the mixing chamber outlet and an expanding part expanding outwards from the neck part. With the ejector, the technical problems of relatively high speed of a smoke screen produced in the space environment in the prior art in the field and difficulty in control on the diffusion range of the smoke screen are solved.

Description

technical field [0001] The invention relates to the field of injectors, in particular to an impact-reflecting injector for generating low-velocity smoke screens in a space environment. Background technique [0002] The space environment refers to the environmental conditions in which a spacecraft flies in outer space. [0003] The smoke screen is composed of a large number of fine material particles suspended in the air. By releasing the smoke screen, it can interfere with the photoelectric detection system to achieve the purpose of covering the target. It has good economy and high practicability. An effective means of carrying out target cover operations. Pneumatic spraying of smoke is a process in which gas is used as the power source to disperse smoke particles. Under the strong disturbance of the airflow, the smoke particles acquire a certain speed and form a smoke cloud with the airflow at a certain distance. [0004] The prior art discloses a method for generating l...

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Problems solved by technology

[0007] The object of the present invention is to provide a kind of impingement reflective ejector for generating low-speed smoke screen in space environment, to solve the technical problems that the speed of generating smoke screen in space environment is faster and the diffusion range of smoke screen is difficult to control in the prior art

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