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A wind tunnel experimental device for simulating snowfall for low mobility particles

A wind tunnel experiment, low fluidity technology, applied in measurement devices, aerodynamic tests, testing of machine/structural components, etc., can solve problems such as high cost, achieve high simulation fidelity, simple device structure, and stacking height maintain an even effect

Active Publication Date: 2020-10-02
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The device of this patent is still an artificial snow-making device, and the cost is relatively high

Method used

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  • A wind tunnel experimental device for simulating snowfall for low mobility particles
  • A wind tunnel experimental device for simulating snowfall for low mobility particles
  • A wind tunnel experimental device for simulating snowfall for low mobility particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A wind tunnel experimental device suitable for simulating snowfall with low fluidity particles, its structure can be found in figure 1 shown, including:

[0025] Feeding mechanism: used to transport the particles of simulated snowfall to the powder falling mechanism; the feeding mechanism includes a collection bucket 11, a feed pipe 12 and a distribution pipe 13, wherein the two ends of the feed pipe 12 are respectively connected to the collection bucket 11 and the distribution pipe 13. The material pipe 13 and the material distribution pipe 13 are placed above the powder falling pan 22 and are used to send the particles into the powder falling pan 22 .

[0026] Powder falling mechanism: It is composed of a bracket and a powder falling component arranged on the bracket. The powder falling component includes a powder falling frame, a metal gauze 46 and a soft brush assembly arranged on the powder falling frame, the metal gauze 46 and the powder falling frame It is relat...

Embodiment 2

[0030] On the basis of embodiment 1, this embodiment is further set to:

[0031] Such as figure 2 As shown, spring 23 is also installed between the powder falling frame and the support. In this way, the powder dropping mechanism can also generate a certain degree of overall vibration on the spring 23 when the soft brush assembly is tossing, which can help the particles to fall from the gap.

Embodiment 3

[0033] On the basis of embodiment 1, this embodiment is further set to:

[0034] Such as figure 2 with image 3 As shown, the powder falling frame is also provided with a plastic soft brush that assists the particles to fall. Brush 45 has many groups of bristle parts that are close to metal gauze 46, and guide rail 41 is fixedly arranged on the powder falling frame, and slide block 42 that moves along it is also installed on guide rail 41, and this slide block 42 and plastic soft brush 45 The top is fixedly connected, and the plastic soft brush 45 is driven by the drive motor 55 through the eccentric transmission part 43, and reciprocates on the guide rail 41 by the slider 42, and the bristle part of the plastic soft brush 42 lower surface is attached to the metal gauze 46 upper surface. This situation is mainly suitable for particles with less fluidity. The process of the particles being sent from the feeding mechanism to the powder falling tray 22 and starting to fall is ...

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Abstract

The invention relates to a snowfall simulation wind tunnel experiment device suitable for low-liquidity particles. The wind tunnel experiment device comprises a feeding mechanism used for conveying snowfall simulation particles to a powder falling mechanism; the powder falling mechanism composed of a support and a powder falling assembly arranged on the support; and a mobile measurement mechanismarranged beside the powder falling mechanism and used for measuring the particle stacking height of the measuring area located below the powder falling mechanism. The powder falling assembly comprisesa powder falling frame, and a metal gauze and a soft brush assembly that are arranged on the powder falling frame, the metal gauze and the powder falling frame are oppositely and fixedly arranged, and form a powder falling tray for receiving the conveying particles of the feeding mechanism through cooperation, the soft brush assembly is tightly attached to the upper surface of the metal gauze, and moves back and forth through the soft brush assembly to assist the particles arranged on the metal gauze to fall off. Compared with the prior art, the device is simple in structure and low in test cost, the simulation reality degree is high, and the accumulation height of the particles in the test area can be effectively guaranteed.

Description

technical field [0001] The invention relates to a wind tunnel test device, in particular to a wind tunnel test device suitable for simulating snowfall of low fluidity particles. Background technique [0002] In cold and snowy regions, house collapses and casualties caused by snow disasters occur from time to time. Snow load is an important design load in structural design, and its influence on building roof structures cannot be ignored, especially for long-span structures, low building structures, light roof structures, and membrane structure buildings, etc., snow loads are formed under the action of wind The damage caused by the uneven distribution of the structure is more significant. Therefore, it is very important to reasonably determine the value of the snow load on the roof surface, and it is also a key issue that is widely concerned and studied by engineering designers at this stage. Due to the high cost of low-temperature wind tunnels and artificial snowmaking devi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M9/00
CPCG01M9/00
Inventor 周晅毅顾明鲁鹏
Owner TONGJI UNIV
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