Velocity Calibration and Investigation of the Flow Field at Air Knife Exit

Journal of Atmospheric and Environmental Optics ›› 2013, Vol. 8 ›› Issue (5): 321-325.

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Velocity Calibration and Investigation of the Flow Field at Air Knife Exit

XIANG Wen-jie1,2, WU Xiao-qing1, HOU Zaihong1

(1 Key Laboratory of Atmospheric Composition and Optical Radiation, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 220031, China;
2 University of Chinese Academy of Sciences, Beijing 100039, China)

Received:2013-04-22 Revised:2013-05-30 Online:2013-09-28 Published:2013-09-06

Abstract

Abstract:

Wind velocity in different barometric pressure and characteristics of the flow field at the vent port of air knife, designed by Institute of Optics and Electronics, Chinese Academy of Sciences, driven by compressed gas were calibrated and analyzed by using a IFA-300 hot-wire anemometer. The results show that wind velocity has a good liner relation with barometric pressure; the larger the pressure, the greater the velocity; and the uniformity and stability of flow field at the vent port are related to the location of flow field. In the centre of the flow field, the velocity of flow field was the largest, and the instability was the lowest, its value was close to 2%. On the edge of the flow field, the velocity of flow field was the lowest, and the instability was the largest, its value approximately equaled 28%.

Key words: air knife, wind velocity, characteristic of flow field

CLC Number:

XIANG Wen-Jie, WU Xiao-Qing, HOU Zai-Hong. Velocity Calibration and Investigation of the Flow Field at Air Knife Exit[J]. Journal of Atmospheric and Environmental Optics, 2013, 8(5): 321-325.

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Velocity Calibration and Investigation of the Flow Field at Air Knife Exit

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