Tracer particle spreading device, tracer particle spreading system and wind tunnel test system
A technology for tracking particles and particles, applied in the field of wind tunnel testing
Active Publication Date: 2021-01-19
NAT UNIV OF DEFENSE TECH
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Problems solved by technology
[0004] The invention provides a tracer particle spreading device, a tracer particle spreading system and a wind tunnel test system to solve the problem of how to realize uniform spreading of tracer particles and uniform mixing of tracer particles and wind tunnel airflow
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[0024] 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 with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0025] figure 1 is a schematic diagram of a tracer particle spreading device in a preferred embodiment of the present invention; figure 2 is a schematic diagram of a tracer particle spreading system in a preferred embodiment of the present invention.
[0026] Such as figure 1 As shown, the tracer particle spreading device of this embodiment is used to evenly spread the tracer particles into the air supply pipeline 3 of the wind tunnel and uniformly mix the tracer particles with the airflow in the air supply pipeline 3, and the air supply pipeline 3 Comprising an airflow input pipe 31 for supplying airflow input, a mixing pipe 32 communicating with the output end of the airflow input pipe 31...
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The invention provides a tracer particle spreading device, a tracer particle spreading system and a wind tunnel test system. The tracer particle spreading device comprises a particle input tube that is disposed outside an airflow flow input tube and is used for inputting tracer particles and a nozzle that is communicated with the output terminal of the particle input tube and extends into a mixingcavity of a mixing tube. The nozzle spreads tracer particles outputted by the particle input tube uniformly into the mixing cavity of the mixing tube, so that the tracer particle and the airflow aremixed uniformly and then the mixture is outputted through an airflow output tube. The radial dimension of the inner cavity of the airflow input tube is smaller than that of the mixing cavity of the mixing tube, so that a backward step is formed at the communication position of the inner cavity of the airflow input tube and the mixing cavity of the mixing tube. The nozzle is arranged at the backward step, so that the mixing uniformity of the tracer particles and the airflow can be enhanced by using the separation and reattachment characteristics of the back step airflow. The nozzle sprays tracer particles at the backward step and the mixing uniformity of the tracer particles and the airflow is enhanced by using the separation and reattachment characteristics of the back step airflow.
Description
technical field [0001] The invention relates to the technical field of wind tunnel tests, in particular to a tracer particle spreading device. In addition, the present invention also relates to a tracer particle spreading system comprising the above tracer particle spreading device. In addition, the present invention also relates to a wind tunnel test system comprising the above tracer particle spreading device. Background technique [0002] Particle image velocimetry (PIV), as a non-contact flow field optical diagnostic technology, can realize non-contact, instantaneous full-flow velocity field measurement, and is widely used in the field of aerospace testing. Based on the planar laser scattering technology (NPLS) of nanoparticle tracking, by sowing nanoparticles in the flow field, the camera captures the scattered light of the nanoparticles, and realizes the capture of the fine structure of the flow field. [0003] To carry out PIV and NPLS experiments in supersonic and ...
Claims
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IPC IPC(8): G01M9/00
CPCG01M9/00
Inventor 冈敦殿易仕和陆小革
Owner NAT UNIV OF DEFENSE TECH