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Wind tunnel test system and method for stack surface wind speed measurement

A wind tunnel test and stacking technology, which is applied in the field of wind tunnel test system for wind speed measurement on the stacking surface, can solve the problems affecting the accuracy of dust emission, troubles, and inconsistent wind speed values

Pending Publication Date: 2022-07-12
TIANJIN RES INST FOR WATER TRANSPORT ENG M O T +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, it has been more than ten years since the derivation of the formula. Due to the poor conditions of the wind tunnel test at that time, the relatively backward data acquisition components and analysis equipment, etc., only the dust emission test of different steady incoming winds was designed, and the ground roughness could not be considered comprehensively. The impact of turbulent wind on the dust on the stacking surface caused by the layout of the storage yard and the layout of the stack caused a series of problems such as inconsistent values ​​of wind speed in the practical application of the formula, which affected the accuracy of the prediction of the amount of dust generated, and also affected the environment of the dry bulk cargo terminal construction project. The work of impact assessment has caused great troubles

Method used

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  • Wind tunnel test system and method for stack surface wind speed measurement
  • Wind tunnel test system and method for stack surface wind speed measurement
  • Wind tunnel test system and method for stack surface wind speed measurement

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Experimental program
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Embodiment 1

[0037] like figure 1 As shown, this embodiment provides a wind tunnel test system for measuring the wind speed of the stack surface, including: a stack model to be tested, and a wind flow field system;

[0038] The stack model to be tested is used to obtain the surface wind speed based on the probe;

[0039] The wind flow field system is used to simulate the natural wind, and test the stack model to be tested based on the natural wind to obtain the surface wind speed of the stack model to be tested.

[0040] The shape of the stacking model to be tested is a trapezoid body, and probes are installed on each surface of the trapezoid body, and the probes are used to measure the wind speed.

[0041] Install a probe every 10cm on the three faces along the long side of the trapezoid. If the length of the long side is less than or equal to 10cm, install only one probe on each face.

[0042] The wind flow field system includes a tunnel body, a fan, a wind profile adjustment module an...

Embodiment 2

[0060] According to the content in the first embodiment, the second embodiment specifically discloses:

[0061](1) Simulation of wind load in wind tunnel

[0062] In the atmospheric boundary layer, the wind speed increases with the increase of the height above the ground. When the pressure field is constant with the height, the law of the increase of the wind speed with the height mainly depends on the ground roughness and the vertical temperature gradient. The wind tunnel test for the wind speed measurement of the stack surface is carried out in a simulated atmospheric boundary layer turbulent wind field. The type of the simulated wind field is determined according to the topography and landforms within 2 kilometers upstream of the simulated area. In "Code for Loading of Building Structures" GB50009-2012, landforms (or surface roughness) are divided into four categories:

[0063] Category A refers to the offshore sea surface and islands, coasts and desert areas, the gradient...

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Abstract

The invention discloses a wind tunnel test system for measuring the surface wind speed of a stack, and the system comprises a to-be-measured stack model which is used for obtaining the surface wind speed based on a probe; and the wind flow field system is used for simulating natural wind and testing the to-be-tested stacking model based on the natural wind to obtain the surface wind speed of the to-be-tested stacking model. The invention also discloses a wind tunnel test method for stack surface wind speed measurement, and the method comprises the steps: constructing an air flow field system, blowing a to-be-measured stack model through the air flow field system, and obtaining the wind speed data of each surface of the to-be-measured stack model; obtaining a plurality of wind speed ratios based on the wind speed data of each surface of the to-be-tested stacking model; performing weighted average on the area of each surface based on a plurality of wind speed ratios to obtain a comprehensive wind speed ratio; and obtaining a wind speed influence coefficient based on the comprehensive wind speed ratio, and calculating the stacking surface wind speed based on the wind speed influence coefficient.

Description

technical field [0001] The invention belongs to the field of wind velocity measurement, in particular to a wind tunnel test system and method for measuring the wind velocity of a stacking surface. Background technique [0002] The demand for coal and various ores is increasing with the rapid development of the national economy. The dust generated during the temporary storage of various bulk cargoes in the port yard will not only cause serious air pollution, but also take away a large amount of dust, causing material damage. Economic losses. The dust in the port bulk cargo yard is mainly divided into dynamic operation disturbance dust and static storage wind erosion dust according to the dust generation method. The bulk cargo in the gap is formed from the static state to the suspended state under the direct action of the wind; while the dynamic dust is mainly formed when the cargo passes through the air during the operation of the yard, and the cargo spreads with the wind un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M9/02G01M9/04G01P5/14
CPCG01M9/02G01M9/04G01P5/14Y02A90/10
Inventor 薛永华井亮李金钊张春意
Owner TIANJIN RES INST FOR WATER TRANSPORT ENG M O T
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