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Real-time measurement method of high-speed particle flow distribution and measuring device

A high-speed particle and flow technology, which is applied in measurement devices, radio wave measurement systems, and electromagnetic wave re-radiation, etc., can solve the problem that the spatial distribution information of high-speed particle flow cannot be directly obtained.

Inactive Publication Date: 2012-10-03
INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the high-speed particle flow with more than two-dimensional spatial distribution, this test method is only applied to the experimental verification of the debris cloud computing model, and cannot directly obtain the momentum spatial distribution information of the high-speed particle flow

Method used

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  • Real-time measurement method of high-speed particle flow distribution and measuring device
  • Real-time measurement method of high-speed particle flow distribution and measuring device
  • Real-time measurement method of high-speed particle flow distribution and measuring device

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Experimental program
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Embodiment 1

[0042] see Figure 1 to Figure 4 As shown, the method for measuring the spatial distribution of the high-speed particle flow in this embodiment includes three parts: the high-speed particle flow test device, the test method, and the momentum inversion method.

[0043] 1. High-speed particle flow test device

[0044] The high-speed particle flux measurement device consists of a high-speed particle momentum receiver and velocity signal detection and recording equipment (such as Doppler laser velocity interferometer).

[0045] (1) High-speed particle momentum receiver

[0046] like figure 1 As shown, the high-speed particle momentum receiver is a part of the high-speed particle flow test device. The high-speed particle momentum receiver is designed based on one-dimensional stress conditions. For the surface of high-speed particle flow), a layer of aluminum film with a thickness of about 0.1 mm is tightly attached to a layer of aluminum film with a thickness of 1-5 microns, and...

Embodiment 2

[0069]This embodiment is the application of the present invention in the field of material dynamic high pressure physics research. We carried out an experimental study on the radial dispersion of jet particles during the microspatial fracturing of metallic tin. A flyer with a thickness of 200 μm, a diameter of 20 mm, and a speed of 9 km / s is driven by an electric gun, and a metal tin sample with a thickness of 700 μm is hit on a high-speed plane, and the metal tin sample is impacted and melted, resulting in delamination and fragmentation. If the traditional Assay window test method is used, the distribution characteristics of micro-split particles along the radial direction cannot be obtained, and due to the constraints of window thickness and two-dimensional effects, the effective test time is only 1-2 microseconds, and only the momentum characteristics of frontier particles are provided. use figure 2 As shown in the experimental protocol, image 3 Given the Doppler laser ...

Embodiment 3

[0071] Under extreme conditions such as strong detonation experiments, space debris impacts, and weapon confrontation, components are often subjected to high-speed and continuous impacts from debris. Even if the debris particles are small, such as within tens of microns, they can still cause great damage. Experimentally establish a debris cloud high-speed launching device, which can evaluate the performance of the protective structure. However, as an experimental simulation device, it is necessary to determine the properties of the emitted debris particles, such as the momentum density distribution. Traditional testing methods, such as soft recovery methods, high-speed photography, etc., are only suitable for quantitative characterization of extremely low-density debris clouds. Therefore, in this embodiment, we launch the debris cloud on the electric gun device, and use the test device described in this invention to quantitatively test the momentum distribution of the debris ...

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Abstract

The invention discloses a real-time measurement method of high-speed particle flow distribution and a measuring device. The device comprises a tester body, a receiver body and a speed signal detection and recording device, and the tester body is internally provided with a constant-diameter movement cavity; the diameter of the receiver body is matched with the diameter of the movement cavity, the receiver body is arranged in the movement cavity and moves along the axial direction of the movement cavity under the effect of high-speed particle flow, the end face of the receiver body opposite to the high-speed particle flow is provided with an aluminum film, and the other end of the receiver body is provided with a high-impedance film; and the speed signal detection and recording device is connected with the tester body in a fixed or splitting way and is used for detecting and recording the speed of movement of the receiver body. By adopting the testing method and the device, quantitative testing on momentum distribution of high-speed particle flow such as debris cloud, mass ejection and the like can be realized, and an effective path can be provided for research on the generation mechanism, material models of high-speed particle flow and the like. In engineering applications, the quantitative characterization of the high-speed particle flow is of a base for development of high-speed impact effects of particle flow / structural materials, and a testing and evaluation platform for optimal design of structures / materials.

Description

technical field [0001] The invention belongs to the field of high-speed collisions, and in particular relates to a real-time measurement method and a measurement device for flow distribution of high-speed particles. Background technique [0002] In the field of ultra-high-speed collisions, the debris cloud and micro-matter jets generated by the high-speed collision between projectiles / flyers and target plates are important research contents for the dynamic and high-pressure physical properties of materials, the design of protective structures, and the implosion process of weapons. In the field of engineering applications, for example, the high-speed penetration of fine particles into the blades of high-speed turbine engines during the combustion process will significantly reduce the service life of the blades. The real-time measurement of the momentum distribution of high-speed particle flow (such as debris cloud and microspray matter) is of great significance in theoretical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/58
Inventor 陶彦辉宋振飞莫建军赵士操谭福利王桂吉
Owner INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS