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전세종(Sejong Chun),최용문(Yong Moon Choi),최해만(Hae Man Choi),최지철(Ji Chul Choi),홍경기(Kyung Ki Hong),한상우(Sang Woo Han),김웅선(Woong Sun Kim) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
The averaging pitot tube or annubar is widely employed to measure the flow rate of the pollutants discharged from the chimney in many industrial situations. Accurate monitoring of the amount of the discharged pollutants necessitates the annubar calibration, which is usually performed in wind tunnels and the calibration conditions are dependent on the size of the wind tunnel test section. However, there are many situations where annubars are larger than the typical size of wind tunnel test sections. In the present study, a new technique using partial blockage was proposed, enabling calibrations of large annubars in various configurations. The results demonstrated favorable agreements with the original annubar coefficients.