Boundary Layer Profile - Wind tunnel No. 4 - Laboratory of Building- and Environmental Aerodynamics (see photographs) |
The wind tunnel has a cross section of 2 m width and 1 m height, confined by
smooth vertical walls and ceiling. In the test section, the ceiling is adjusted for zero pressure gradient in streamwise direction (dp/dx = 0). |
Profile data of approaching flow |
height | velocity | standard deviation | turbulence intensity I | ||||||
z | u | σu | σv | σw | tke | Iu | Iv | Iw | Iuvw |
[m] | [m/s] | [m/s] | [m/s] | [m/s] | [m2/s2] | [%] | [%] | [%] | [%] |
0.005 | 1.79 | 1.07 | 0.63 | 0.61 | 0.96 | 60.0 | 35.2 | 34.1 | 44.7 |
0.010 | 2.20 | 1.09 | 0.77 | 0.76 | 1.17 | 49.3 | 35.0 | 34.5 | 40.2 |
0.015 | 2.49 | 1.15 | 0.83 | 0.81 | 1.34 | 46.2 | 33.4 | 32.5 | 37.9 |
0.020 | 2.71 | 1.18 | 0.79 | 0.75 | 1.29 | 43.5 | 29.2 | 27.9 | 34.3 |
0.025 | 2.90 | 1.16 | 0.75 | 0.71 | 1.20 | 40.0 | 25.7 | 24.4 | 30.9 |
0.030 | 3.05 | 1.13 | 0.71 | 0.66 | 1.10 | 36.9 | 23.2 | 21.6 | 28.1 |
0.040 | 3.35 | 1.04 | 0.69 | 0.58 | 0.94 | 31.0 | 20.7 | 17.2 | 23.7 |
0.050 | 3.57 | 1.00 | 0.66 | 0.60 | 0.90 | 28.0 | 18.5 | 16.7 | 21.6 |
0.080 | 4.11 | 0.99 | 0.63 | 0.60 | 0.87 | 24.1 | 15.3 | 14.6 | 18.5 |
0.100 | 4.39 | 0.98 | 0.65 | 0.59 | 0.86 | 22.4 | 14.7 | 13.4 | 17.3 |
0.130 | 4.75 | 0.90 | 0.61 | 0.57 | 0.75 | 18.9 | 12.8 | 12.1 | 14.9 |
0.160 | 5.06 | 0.85 | 0.59 | 0.54 | 0.68 | 16.7 | 11.6 | 10.7 | 13.3 |
0.190 | 5.33 | 0.82 | 0.58 | 0.54 | 0.65 | 15.4 | 10.8 | 10.2 | 12.4 |
0.230 | 5.64 | 0.75 | 0.55 | 0.50 | 0.56 | 13.2 | 9.7 | 8.9 | 10.8 |
0.270 | 5.92 | 0.68 | 0.51 | 0.48 | 0.47 | 11.5 | 8.5 | 8.2 | 9.5 |
0.320 | 6.23 | 0.62 | 0.51 | 0.44 | 0.42 | 10.0 | 8.1 | 7.1 | 8.5 |
0.370 | 6.51 | 0.56 | 0.48 | 0.41 | 0.36 | 8.6 | 7.3 | 6.3 | 7.5 |
0.420 | 6.76 | 0.50 | 0.45 | 0.39 | 0.30 | 7.4 | 6.7 | 5.7 | 6.6 |
0.470 | 6.99 | 0.50 | 0.39 | 0.37 | 0.27 | 7.2 | 5.6 | 5.3 | 6.1 |
0.520 | 7.02 | 0.42 | 0.36 | 0.37 | 0.22 | 6.0 | 5.1 | 5.3 | 5.5 |