Muffling device for supersonic combustion ramjet test bench

A ramjet, supersonic combustion technology, applied in the direction of engine testing, measuring devices, machine/structural component testing, etc., to achieve the effects of eliminating jet noise, working stably, and eliminating broadband jet noise

Active Publication Date: 2016-05-25
INST OF MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems existing in the existing mufflers, the present invention provides a muffler for the supersonic combustion ramjet test bench to better eliminate the jet noise of the supersonic ramjet test bench

Method used

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  • Muffling device for supersonic combustion ramjet test bench
  • Muffling device for supersonic combustion ramjet test bench
  • Muffling device for supersonic combustion ramjet test bench

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Embodiment Construction

[0021] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0022] like figure 1 As shown, the muffler device for the supersonic combustion ramjet engine test bench according to the embodiment of the present invention includes a muffler system, a cooling water injection system and a fan exhaust system connected in a straight line in sequence, and the three systems all have The injection channel is coaxial, and the muffler system is arranged directly behind the combustion chamber tail end 1 of the supersonic combustion ramjet engine and close to the combustion chamber tail end 1 of the supersonic combustion ramjet engine.

[0023] The muffler system consists of 4 mufflers 2, 3, 4 and 5 connected in series. Among them, muffler 5 is the m...

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PUM

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Abstract

The invention discloses a muffling device for a supersonic combustion ramjet engine test bench. The muffling device comprises a muffler system, a cooling water injection system and a fan exhaust system which are linearly connected in sequence, wherein the three systems are respectively provided with an ejection channel, and the ejection channels of the three systems are coaxial. The muffler system is arranged right behind the tail end of a combustion chamber of a supersonic combustion ramjet engine to suppress noise generated by jet flow at the tail end of the combustion chamber of the supersonic combustion ramjet engine; the cooling water injection system is used for cooling jet flow passing through the ejection channel thereof and reducing the flow speed of the jet flow; and the fan exhaust system is used for providing ejection for the jet flow at the tail end of the combustion chamber of the supersonic combustion ramjet engine and carrying out air exhausting. The problem of survival of a muffler in extremely-high-temperature and extremely-high-speed jet flow is solved, ejection is provided for jet flow at the tail end of the combustion chamber of the supersonic combustion ramjet engine and air is exhausted, and the muffling device has the advantages of being long in service life, stable in work and capable of well eliminating jet flow noise of the supersonic combustion ramjet engine test bench.

Description

technical field [0001] The invention relates to a muffler, in particular to a muffler for a supersonic combustion ramjet test bench. Background technique [0002] The supersonic combustion ramjet test bench will produce very serious noise when it is working, especially the broadband supersonic jet noise at the engine outlet. In order to reduce the noise, it is necessary to take noise reduction measures. Extremely fast (about 1000m / s), extremely high temperature (about 2200K), and low pressure (usually less than 1atm), the existing mufflers simply cannot withstand the scour of such high-temperature and high-speed airflow and provide enough power to discharge the tail jet. Contents of the invention [0003] Aiming at the problems existing in the existing muffler, the invention provides a muffler for a supersonic combustion ramjet engine test bed to better eliminate the jet noise of the supersonic ramjet engine test bed. [0004] In order to achieve the above object, the tec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M15/02
Inventor 程迪孟令瑾范学军
Owner INST OF MECHANICS CHINESE ACAD OF SCI
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