TRAINING OF WIND SPEED CALIBRATION

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The blockage effect • This effect is influenced by the immersion depth and the size of the anemometer. • Basically: the bigger the head and the pole of an anemometer is the higher is the blockage effect in the flow field. • This effect influences the wind tunnel as well as the calibration 58/10
The blockage effect What happens inside the wind tunnel? • The pressure accumulates against the flow direction. An influence on the result of the reference is possible. • The test bed resistance in the wind tunnel raises up and the volume flow decreases. • In a closed measuring section the air velocity raises around the probe. The value at the display increases. • In an open measuring section the air flow enlarges around the probe. The value at the display decreases. 59/10
Page 1 and 2:
REPUBLIC OF TURKEY MINISTRY OF ENVI
Page 3 and 4:
Introduction of Wind Speed Calibrat
Page 5 and 6:
Wind Speed Calibration Laboratory W
Page 7 and 8: Furness Control FCO510 Micromanomet
Page 9 and 10: Devices of the Wind Speed Calibrati
Page 11 and 12: Parts of wind tunnel 11/10
Page 13 and 14: Open Jet Closed Jet 13/10
Page 15 and 16: Air flow measurement 15/10
Page 17 and 18: Air Flow Measurement 17/10
Page 19 and 20: 19/10
Page 21 and 22: Schematic display of LDA 21/10
Page 23 and 24: Pitot-static tube 23/10
Page 25 and 26: - A pair of concentric tubes Pitot-
Page 27 and 28: Differential Pressure Equation •P
Page 29 and 30: Air Flow Measurement 29/10
Page 31 and 32: How it works: Sonic anemometers Mea
Page 33 and 34: Basics of uncertainty 33/10
Page 35 and 36: Source of Uncertainties • Uncerta
Page 37 and 38: Evaluation of standard uncertainty
Page 39 and 40: Basics of uncertainty Vurgulanması
Page 41 and 42: Calibration Certificate 41/10
Page 43 and 44: The calibration certificate -page 1
Page 45 and 46: Flow profile Homogeneity test Immer
Page 47 and 48: Finding flow profile The flow profi
Page 49 and 50: The influence of immersion depth
Page 51 and 52: immersion depth:50 mm from the frin
Page 53 and 54: immersion depth:127 mm from the fri
Page 55 and 56: immersion depth:205 mm from the fri
Page 57: The influence of immersion depth 57
Page 61 and 62: A sample of simulation 61/10
Page 63 and 64: Placement of reference/test sensor
Page 65 and 66: Appreciate the WMO standards for wi
Page 67 and 68: WMO commendation Required measureme
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TRAINING OF WIND SPEED CALIBRATION

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