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Supersonic-speed air ejector

An ejector and supersonic technology, which is applied in the field of aerodynamics, can solve the problem of separate air supply for the nozzle, and achieve the effects of easy miniaturization of the system, shortening of the lateral mixing distance, and compact system

Pending Publication Date: 2021-03-05
CHINA ACAD OF AEROSPACE AERODYNAMICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, whether it is depressurization operation or flow regulation, to achieve two functions, a separate air supply and flexible layout of the nozzle are required

Method used

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  • Supersonic-speed air ejector
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  • Supersonic-speed air ejector

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Embodiment Construction

[0051] Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0052] The invention provides a supersonic air ejector, which comprises an air intake pipe, a pressure-resistant shell and a mixing diffuser pipe connected in sequence, and also includes multiple sets of ejector pipes. The multiple groups of ejector pipes are installed at different cross-sectional positions of the pressure-resistant shell, and the ejector pipes are uniformly arranged in the ejection channel coaxial with the intake pipe; the ou...

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Abstract

The invention provides a supersonic-speed air ejector. The supersonic-speed air ejector comprises an air inlet pipe, a pressure-resistant shell and a mixed diffuser pipe which are connected in sequence, and further comprises a plurality of sets of ejection pipes, wherein the plurality of sets of ejection pipes are installed at different cross section positions of the pressure-resistant shell, andthe ejection pipes are evenly distributed in an ejection channel coaxial with the air inlet pipe; Laval nozzles are arranged at the outlet ends of the ejection pipes and evenly distributed on the inlet cross section of the mixed diffuser pipe; and the air source of each set of ejection pipes is one path, and a plurality of paths of air sources are independently controlled. According to the supersonic-speed air ejector, by adopting a method of installing the ejection pipes, the Laval nozzles are evenly distributed, different numbers of ejection pipes are selected according to flow requirementsso as to form ejectors with different flow specifications, the area ratio of the ejector is changed by selectively opening the Laval nozzles, an ejection coefficient and a pressurization ratio of theejector are maintained, airflow parameters are adjusted to maintain the ejector to work near a design point, the highest efficiency is achieved, and standardization is easy to achieve.

Description

technical field [0001] The invention relates to the field of aerodynamics, in particular to an air ejector in wind tunnel equipment, in particular to a supersonic air ejector with large airflow contact area, high mixing efficiency and flexible adjustment. Background technique [0002] The air ejector is a kind of fluid machinery, which has the function of vacuuming. It is a supersonic ejector with normal temperature air as the medium. It is widely used in the fields of aerospace, military defense and national industry. The supersonic ejector has the advantages of simple structure, small size, and rapid response. Rocket engine high-altitude test bench, hypersonic wind tunnel, pneumatic laser and chemical laser pressure recovery system have reached the level of mature application. [0003] The ejector methods currently used in conventional hypersonic wind tunnels include: single nozzle central ejection, annular ejection and multi-nozzle ejection, etc. Single-nozzle central ej...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04F5/16F04F5/20F04F5/44F04F5/48F04F5/52G01M9/04
CPCF04F5/16F04F5/20F04F5/44F04F5/48F04F5/52G01M9/04
Inventor 郭孝国马继魁
Owner CHINA ACAD OF AEROSPACE AERODYNAMICS
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