Hypersonic inward turning inlet and isolator flow field chromatogram display method and system

An internally rotating air inlet, hypersonic technology, applied in the field of fluid mechanics, can solve problems such as difficult optimization and difficult to define the impact of system performance, achieve design optimization, and achieve the effect of flow field observation

Active Publication Date: 2017-06-27
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

At present, the country is still mainly in the simulation effect test stage of the internal rotation inlet, and the related system performance

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  • Hypersonic inward turning inlet and isolator flow field chromatogram display method and system
  • Hypersonic inward turning inlet and isolator flow field chromatogram display method and system
  • Hypersonic inward turning inlet and isolator flow field chromatogram display method and system

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Embodiment Construction

[0038] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in view of the current situation where it is difficult to make a breakthrough in the design optimization of the inward turning inlet, this project starts from the microscopic level of the inner turning inlet to study the distribution of the internal flow field, so as to provide the hypersonic inward turning It provides a theoretical basis for the design optimization of the type inlet and isolation section.

[0039] Please refer to figure 1 , figure 1 It is a structural schematic diagram of a specific embodiment of the flow field tomography display system of the hypersonic inward turning inlet and isolation section provided by the present invention, which shows the outer compression surface of the i...

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Abstract

The invention discloses a hypersonic inward turning inlet and isolator flow field chromatogram display method and system. The obtaining method comprises the steps of inputting water vapor into a wind tunnel, and forming nano-particles via condensation of the water vapor in the wind tunnel; the nanoparticles entering, as tracer particles, into a flow field formed by an inward turning inlet and an isolator; and irradiating a plurality of cross-sectional positions in at least one direction of the flow field with laser light, and shooting a scattering image of the tracer particles in the laser irradiated plane to obtain a tomographic image of the flow field. In the invention, the nanoparticles condensed by the water vapor are used as tracer particles to analyze the scattering image, the flow field density distribution is indirectly obtained, the flow field observation can be well realized, and the problem that a traditional schlieren method is incapable of accurate reflection is solved. In addition, the tracer particles formed by the water vapor easily meet the requirements of the number of particles and diameter, the injection process of the nanoparticles is reduced, and the method is not limited by the time of a wind tunnel experiment.

Description

technical field [0001] The invention relates to the technical field of fluid mechanics, in particular to a method and system for flow field tomography display of a hypersonic inward turning inlet and an isolation section. Background technique [0002] The hypersonic inward-rotating inlet has high flow capture capacity and compression efficiency, low total pressure loss, and is easy to transition to a circular combustion chamber. It has gradually been introduced into the design of air-breathing hypersonic integrated aircraft. [0003] The internal turning air inlet has various profile structures, and the profile structures are irregular and complex. At present, the country is still mainly in the simulation effect test stage of the internal rotation inlet, and the related system performance impact is difficult to define. For example, the design of the internal rotation inlet has a bottleneck and is difficult to further optimize. Contents of the invention [0004] The presen...

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Application Information

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IPC IPC(8): G01M9/02G01M9/04
CPCG01M9/02G01M9/04
Inventor 李一鸣李祝飞詹东文杨基明
Owner UNIV OF SCI & TECH OF CHINA
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