PIV tracer particle wall spreading device

A particle and wall technology, which is applied in the field of PIV tracer particle wall spreading device, can solve the problems such as the difficulty of calculating the velocity field and the difficulty of tracer particles entering the interior of the near-wall area under test, and achieves the effect of good technical support.

Active Publication Date: 2018-10-09
CHINA SHIP SCIENTIFIC RESEARCH CENTER (THE 702 INSTITUTE OF CHINA SHIPBUILDING INDUSTRY CORPORATION)
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Problems solved by technology

When PIV technology is used for full-field velocity measurement, the flow measurement in some near-wall regions, such as the laminar boundary layer, the boundary layer in the transition region, and the interior of the supercavity, etc., adopts the conventional mainstream region tracer particle seeding method, that is, The tracer particles are so

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  • PIV tracer particle wall spreading device

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Embodiment Construction

[0018] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0019] The present application discloses a PIV tracer particle wall spreading device, which is used for injecting PIV tracer particles into near-wall regions such as laminar flow boundary layer, boundary layer in transition region, and supercavitation. The near-wall region is characterized by a pressure within the region that is less than atmospheric pressure.

[0020] When the PIV tracer particle wall sowing device is used, the wall particle injection device is placed inside the test area such as a wind tunnel or water tank, and other parts of the PIV tracer particle wall sow device are placed outside the test area such as a wind tunnel or water tank.

[0021] Please refer to figure 1 , which shows a PIV tracer particle wall spreadin...

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Abstract

The invention discloses a PIV tracer particle wall spreading device and belongs to the field of flow measurement in the near wall area. The device comprises a particle generator, a high pressure softpipe and a wall particle injection device, wherein the particle generator comprises an air inlet, a particle outlet and a stirrer, the particle outlet of the particle generator is connected with the wall particle injection device through the high pressure soft pipe, the wall particle injection device has a chamber, a particle injection hole and a thin cover plate, the chamber is provided with theparticle injection hole, the particle injection hole is provided with a pressure sensor at the downstream, and the thin cover plate is arranged above the chamber. The device is advantaged in that a problem that the existing PIV tracer particle spreading method cannot make PIV tracer particles enter the boundary layer or the supercavitation is solved, injection of the PIV tracer particles into thenear wall region is achieved, and the good technical support is provided for research of the supersonic or hypersonic boundary layer transition and ventilated supercavitation flow mechanism.

Description

technical field [0001] Embodiments of the present invention relate to the field of flow measurement in a near-wall region, and in particular to a wall spreading device for PIV tracer particles. Background technique [0002] Most of the traditional flow velocity measurement instruments can only perform single-point measurement, and they are contact measurements, which cannot perform undisturbed measurement of the two-dimensional flow field in the entire area. With the rapid development of computer technology and image processing technology, PIV (Particle Image Velocimetry, Particle Image Velocimetry) has broken through the traditional single-point measurement limitation, and can measure the two-dimensional velocity distribution on a cross-section in the flow field instantaneously without contact, and has a relatively High measurement accuracy. Therefore, PIV technology is widely used in the study of fluid mechanics of airflow and water flow. [0003] For underwater moving o...

Claims

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Application Information

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IPC IPC(8): G01P5/20
CPCG01P5/20
Inventor 张传鸿
Owner CHINA SHIP SCIENTIFIC RESEARCH CENTER (THE 702 INSTITUTE OF CHINA SHIPBUILDING INDUSTRY CORPORATION)
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