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A supersonic flow mixing device based on the jet disturbance at the trailing edge of the dividing plate

A technology of supersonic flow and mixing device, applied in rocket engine devices, jet propulsion devices, machines/engines, etc., can solve problems such as unsatisfactory effects, and achieve the effects of simple structure, high-efficiency mixing, and controllable jet flow

Active Publication Date: 2022-06-07
NAT UNIV OF DEFENSE TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, considering the uncontrollable factors of background noise in supersonic flow, the effect of this method is not ideal in practical engineering applications

Method used

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  • A supersonic flow mixing device based on the jet disturbance at the trailing edge of the dividing plate
  • A supersonic flow mixing device based on the jet disturbance at the trailing edge of the dividing plate

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Embodiment Construction

[0017] In order to make the objectives, technical solutions and advantages of the present application more clear, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application.

[0018] The supersonic flow mixing device based on the jet disturbance at the trailing edge of the separator plate provided in this application can be applied to the mixing chamber of the ejection mode of the rocket-based combined cycle engine. Among them, the first supersonic airflow is the compressed supersonic incoming air entering from the intake port, and the second supersonic airflow is the supersonic rich combustion gas accelerated by the expansion of the rocket combustion chamber through the tail nozzle, and the gas flowing out of the rocket combustion chamber is supersoni...

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Abstract

The application relates to a supersonic flow mixing device based on jet disturbance at the trailing edge of the partition plate, which includes a rigid partition plate arranged between two supersonic flows, and jet holes are arranged on the rear edge of the partition plate, and the jet holes are used incident flow. The present application provides separate passages for two supersonic airflows based on the partition plate, and injects the jet flow through the jet holes arranged on the rear edge of the partition plate. Under the disturbance of the partition jet, the flow in the mixed layer is unstable in advance, and the large-scale vortex structure in the mixed layer is broken into a large number of small-scale vortex structures, which can effectively increase the contact area of ​​the upper and lower airflows in the process of downstream evolution to achieve efficient mixing . The supersonic flow mixing device provided by this application does not require external excitation energy, has strong adaptability to working conditions, and has a simple structure. Mixed, with strong engineering applicability.

Description

technical field [0001] The present application relates to the technical field of high-efficiency mixing in the field of aerospace propulsion, in particular to a supersonic flow mixing device based on jet disturbance at the trailing edge of a partition plate. Background technique [0002] With the development of hypersonic propulsion technology, new power forms such as combined cycle and scramjet have received extensive attention. In the engine combustion chamber, the efficient mixing of supersonic gas and air has always puzzled researchers. For supersonic flow, the presence of compression effects coupled with the size constraints of the combustion chamber make the mixing of the flow inefficient. Efficient mixing is an important prerequisite for full combustion, and it is also an important basis for tapping the potential of engine performance and improving the efficiency of propulsion systems. [0003] In order to realize the efficient mixing of supersonic mixing layers, sc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02K9/44F02K9/60
CPCF02K9/44F02K9/60Y02T50/60
Inventor 张冬冬谭建国姚霄刘瑶
Owner NAT UNIV OF DEFENSE TECH