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
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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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