A method and device for measuring flow field pressure field
A technology of pressure field and flow field, applied in the field of particle image velocity measurement, can solve the problem of high hardware requirements
Active Publication Date: 2017-03-08
北京立方天地科技发展有限责任公司
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[0004] In view of this, the main purpose of the present invention is to provide a method and device for measuring the flow field pressure field, which can solve the problem of high hardware requirements when using PIV to measure the flow field pressure field in the prior art
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[0093] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described below are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0094] In the following embodiments of the method and device for measuring the flow field pressure field provided by the present invention, the color camera involved is applicable to various color cameras, no matter whether the color chip of the color camera is a chip of a Bayer filter or Three-dimensional charge coupled device (3-CCD, 3-Charge Coupled Device) chip.
[0095] Before measuring the pressure field of the flow field, it is first necessary to build an experimental platform according to the working conditions and experimental conditions of the flow field to be measured. Taking the two-dimensional flow field as an example, the experimental platfor...
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The invention discloses a method for measuring a flow field pressure field. The method comprises the following steps of performing a single exposure particle image velocimetry (PIV) experiment on a measurement area to acquire a color particle image, wherein the information of a flow field irradiated at different moments in the same exposure time by three monochromatic pulse sources is recorded in the color particle image; respectively performing flow field particle imaging on the three monochromatic pulse sources, and analyzing the contributions of all kinds of monochromatic light to the light intensity of three image layers to obtain light intensity calibration functions; performing image layer split on the color particle image according to the light intensity calibration functions; performing cross-correlation analysis on the split color particle image to obtain a flow field velocity field; determining the flow field pressure field according to the flow field velocity field. Simultaneously, the invention also discloses a device for measuring the flow field pressure field. By adopting the method and the device disclosed by the invention, the problem that the hardware requirement is high when the flow field pressure field is measured by adopting PIV in the prior art can be solved; the experiment cost is reduced; the PIV measuring technique for the flow field pressure field can be helped to be popularized.
Description
technical field [0001] The present invention relates to particle image velocimetry (PIV, Particle Image Velocimetry) technology in the technical field of laser velocimetry, in particular to a method and device for measuring flow field pressure field. Background technique [0002] PIV technology is a modern laser velocity measurement technology, which is mainly used in flow field velocity measurement, and the flow field velocity field is obtained by tracking the movement of tracer particles in the flow field. PIV technology can realize two-dimensional or three-dimensional velocity field measurement through sheet light source or volume light source, and can also realize time-resolved PIV experimental measurement through high-speed camera imaging, and use the fluid dynamics control equation, that is, the N-S equation to solve the reconstruction and obtain the coupling with the velocity field flow field pressure field. [0003] However, high-speed imaging requires high-speed ca...
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IPC IPC(8): G01L11/02
Inventor 高琪王中一王晋军魏润杰
Owner 北京立方天地科技发展有限责任公司