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A wind tunnel experimental device for simulating snowfall for highly mobile particles

A wind tunnel experiment, high fluidity technology, applied in the direction of measuring device, aerodynamic test, machine/structural component test, etc., can solve problems such as high cost, achieve high simulation accuracy, low test cost, and device structure simple effect

Active Publication Date: 2019-07-05
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 highly mobile particles
  • A wind tunnel experimental device for simulating snowfall for highly mobile particles
  • A wind tunnel experimental device for simulating snowfall for highly mobile particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A wind tunnel experimental device suitable for simulating snowfall with high fluidity particles, suitable for wind tunnel tests with relatively large fluidity particles such as quartz sand, etc., its structure see figure 1 shown, including:

[0026] 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 .

[0027] Powder falling mechanism: it consists of a bracket and a powder falling assembly arranged on the bracket. The powder falling assembly includes a powder falling frame, an upper bottom plate 24 and a lower bottom plate 25 which...

Embodiment 2

[0031] On the basis of embodiment 1, this embodiment is further set to:

[0032] Such as figure 2 As shown, spring 23 is also installed between the powder falling frame and the support. The off-axis motor 21 that makes it vibrate is also installed on the powder falling frame. This kind of structure is suitable for the situation where the fluidity of the particles is relatively large. After the particles are sent to the powder dropping tray 22 by the feeding mechanism, the driving part is started to drive the lower bottom plate 25 to move, so that the powder falling of the upper bottom plate 24 and the lower bottom plate 25 that are staggered from each other The holes overlap to a certain extent, so that the particles fall from these staggered gaps. By changing the movement offset of the lower bottom plate 25, the falling flow of the particles can be controlled. During the powder falling process, the off-axis can also be started. The motor 21 makes the powder falling mechani...

Embodiment 3

[0034] On the basis of embodiment 1, this embodiment is further set to:

[0035] Such as image 3 As shown, the driver includes a connecting rod 26 and a push rod 28, wherein the two ends of the connecting rod 26 are respectively hinged to one end of the bottom plate 25 and the push rod 28, and the middle part of the push rod 28 is installed on the powder falling frame through a fulcrum bearing 27. The powder falling frame is also provided with a limit bolt 29. When the push rod 28 is pushed to pull the lower base plate 25, the limit bolt 29 pushes against the push rod 28 to limit the moving distance of the lower base plate 25. When the push rod 28 is pushed forward, the lower base plate 25 moves back a short distance, so that a gap appears in the hole between the upper base plate 24 and the lower base plate 25, and the particles fall from the gap, and the stop bolt 29 can be controlled by screwing in and out. The pushing amount of the push rod 28 controls the size of the gap...

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Abstract

The invention relates to a snowfall simulating wind tunnel experiment device suitable for high fluidity particles, and is suitable for the wind tunnel experiment of the particles of high fluidity likequartz sand. The device comprises a material feeding mechanism; a powder falling mechanism; and a shift measurement mechanism. The powder falling mechanism is composed of a support and a powder falling component which is arranged on the support. The powder falling component comprises a powder falling framework and an upper baseplate and a lower baseplate which are arranged on the powder falling framework and closely clung to each other. Mutually staggered powder falling holes are arranged on the upper baseplate and the lower baseplate. The upper baseplate and the powder falling framework arerelatively fixedly arranged and cooperated to form a powder falling tray for receiving the particles conveyed by the material feeding mechanism. The lower baseplate is connected by a driver and drivento move along the plane of the upper baseplate. The shift measurement mechanism is arranged beside the powder falling mechanism and used for measuring the particle packing height of the measurement area below the powder falling mechanism. Compared with the devices in the prior art, the device is simple in structure, low in test cost and high in simulation authenticity and can effectively guarantee uniform packing height of the particles in the test area.

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 high 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 dev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M9/02
CPCG01M9/02
Inventor 周晅毅顾明鲁鹏
Owner TONGJI UNIV
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