Urban block pedestrian level wind environment assessment method based on wind tunnel test

A technology for urban blocks and wind tunnel tests, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as insufficient accuracy of wind environment assessment methods

Active Publication Date: 2016-11-23
黑龙江省工研院资产经营管理有限公司
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Problems solved by technology

[0006] In order to solve the problem of insufficient accuracy of the existing wind environment assessment methods, the p

Method used

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  • Urban block pedestrian level wind environment assessment method based on wind tunnel test
  • Urban block pedestrian level wind environment assessment method based on wind tunnel test
  • Urban block pedestrian level wind environment assessment method based on wind tunnel test

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specific Embodiment approach 1

[0032] Specific implementation mode one: combine Figure 1 to Figure 4 To illustrate this embodiment, the specific steps of a method for evaluating the wind environment of pedestrians in urban blocks based on wind tunnel tests described in this embodiment are as follows:

[0033] Step 1, calibrate the parameters of the improved Irwin wind speed probe;

[0034] Step 2. Taking a typical urban block as the research object, use acrylic board or PVC board to make the shapes of all buildings and structures near the block with a certain scale ratio, and set up improved Irwin wind speed probes at a certain distance at the height of pedestrians in the block , so as to obtain the test model of the wind environment test;

[0035] Step 3: Carry out the wind environment test to obtain the hourly average wind speed U of the pedestrian height model of the urban block model under different parameter working conditions i and gust wind speed U i,gust , where the gust wind speed U i,gust Can...

specific Embodiment approach 2

[0062] Specific implementation mode two: combination figure 1 Illustrate this embodiment, the improved Irwin wind speed probe in the step 1 of a wind tunnel test-based pedestrian wind environment assessment method in urban blocks described in this embodiment consists of a cylinder with an outer diameter of 10 mm and a height of 15 mm, and digs out A small cylinder with a diameter of 6mm and a depth of 10mm is obtained. The wind speed U at the pedestrian height can be calculated by measuring the pressure p1 on the ground and the pressure p2 at the pedestrian height H=6.7mm. Other components and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0063] Specific implementation mode three: combination figure 1 To illustrate this embodiment, the distance between the improved Irwin wind speed probes in step 2 of a wind tunnel test-based pedestrian wind environment assessment method in urban blocks described in this embodiment is not less than 40 mm, so as to reduce the mutual interference of the wind speed probes on the flow field ; and the test wind speed should be kept greater than 10m / s to ensure the test accuracy of the wind speed probe; the wind tunnel test model can be made of acrylic board or PVC board. Other components and connections are the same as those in the first embodiment.

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Abstract

The invention relates to an urban block pedestrian level wind environment assessment method, in particular to an urban block pedestrian level wind environment assessment method based on a wind tunnel test, and aims to solve the problem of poor accuracy of an existing wind environment assessment method. The method comprises specific steps as follows: parameters of an improved Irwin wind velocity probe are calibrated; a typical urban block is taken as a research object; a wind environment test is performed; the ratios rM and rG of the hourly average wind velocity Ui, site and the gust wind velocity Ui, gust, site at the urban block pedestrian level at each wind angle to the hourly average wind velocity U10, site at 10 m are determined by the aid of the formula (2) and the formula (3); the hourly average wind velocity threshold value Uthr in the wind environment assessment standard is converted into the hourly average wind velocity threshold value Uthr, M at 10 m of the urban block or the equivalent hourly average wind velocity threshold value Uthr, GEM of gust on the basis of the wind velocity ratios rM and rG. The invention belongs to the field of building wind environments.

Description

technical field [0001] The invention relates to a method for assessing the wind environment of pedestrians in urban blocks, in particular to a method for evaluating the wind environment of pedestrians in urban blocks based on wind tunnel tests, and belongs to the field of building wind environments. Background technique [0002] With the development of urbanization in our country, (super) high-rise buildings emerge in large numbers, and their layouts are diverse and their shapes are complex. Tall buildings and buildings in the city will significantly change the wind field around them, so that urban streets, building corners and entrances and other areas will experience significant wind speed acceleration due to the "narrow tube effect", thus worsening the pedestrian height. The windy environment will cause pedestrians to feel uncomfortable and even dangerous. [0003] With the improvement of people's quality of life and the concept of health and comfort, the quality of pede...

Claims

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Application Information

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IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 郑朝荣武岳李胤松陈勇
Owner 黑龙江省工研院资产经营管理有限公司
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