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supersonic flow mixing device

A technology of supersonic flow and flow increasing mixing plate, which is applied in the direction of charging system, engine components, ramjet engine, etc. It can solve the problems of large flow resistance and total pressure loss, difficult optimization, complex structure, etc., and achieve the goal of overcoming flow resistance and total pressure loss, promote fluid blending, and promote high-efficiency blending effects

Active Publication Date: 2019-10-29
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0007] Aiming at the deficiencies of existing active / passive mixing devices in the prior art, such as complex structure, difficult optimization, large flow resistance and large total pressure loss, the present invention provides a supersonic flow mixing device, which has simple structure, applicability Wide range and good mixing effect

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Embodiment Construction

[0031] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0032] refer to image 3 and Figure 4 , is a schematic structural view and a cross-sectional view of the supersonic flow mixing device of the present invention, the device includes a flow mixing plate arranged between two supersonic flow channels of supersonic air flow, and the front section of the flow mixing plate is a flat plate 3 with a certain thickness, The rear section of the flow increasing mixing plate is a curved plate 4 . The rear end of the flat plate 3 is connected with the front end of the curved plate 4 to form a flow increasing mixing plate.

[0033]The device of the present invention is applied to the combustion chamber of a supersonic engine / rocket-based combined cycle engine. The first supersonic airflow 1 is the supersonic incoming air that enters from the intake port, and the second supersonic airflow 2 is the air that e...

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Abstract

The invention provides a supersonic flow mixing enhancement device aiming at defects of structural complexity, difficulty in optimization and high flow resistance and total pressure loss of an existing active / passive mixing enhancement device in the prior art. The supersonic flow mixing enhancement device comprises a flow mixing enhancement plate between supersonic flow passages of two supersonicairflows, the front section of the flow mixing enhancement plate is provided with a flat plate in certain thickness, the rear section of the flow mixing enhancement plate is provided with a curved plate, and the front end of the flat plate and the front end of the curved plate are connected to form the flow mixing enhancement plate. By interaction of a vortex structure and a mixing layer, efficient flow mixing is promoted. The supersonic flow mixing enhancement device has advantages that extra excitation energy is avoided, simple structure is realized, the defect of high flow resistance and total pressure loss is overcome, flow mixing is promoted through intrinsic instability of a curved device, and high applicability is realized.

Description

technical field [0001] The invention relates to a hybrid enhancement device in the field of aerospace, in particular to a A device for supersonic flow mixing by vortexing to promote flow instabilities. Background technique [0002] The mixture of air and gas widely exists in the field of aerospace propulsion, such as in the scramjet engine, as the power core of hypersonic propulsion technology, the rapid mixing of fuel and high-speed air flow in the combustion chamber is necessary for the system to obtain sufficient energy. Net thrust is especially important. However, under the limited size of the combustion chamber, the residence and mixing time of the supersonic incoming flow is very short (milliseconds), and the strong compressibility effect further leads to low mixing efficiency. Therefore, it is necessary to adopt a series of mixing enhancement devices to promote mixing. mix. [0003] Common mixing enhancement devices can be divided into two categories according to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02C7/22F02K7/14
CPCF02C7/22F02K7/14
Inventor 张冬冬谭建国李浩吕良陈春浩王浩姚霄刘瑶
Owner NAT UNIV OF DEFENSE TECH
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