A Study on the Optimal Orifice Location for Air flow Measurement in an Air Duct Leakage Tester

덕트누기시험기용 풍량측정 오리피스의 최적위치 선정에 관한 연구

  • Lee Seung-Chul (School of Fire & Disaster Prevention, Samcheok National University)
  • 이승철 (삼척대학교 소방방재학부)
  • Published : 2006.02.01

Abstract

In this study, five experiments were carried out, with an orifice located downstream of a fan in case I where upstream duct length is 6 D, and that in the downstream is 4 D and different downstream distance to the fan in the rest, so as to determine the optimal location of the orifice and reduce the duct length of airflow measurement device. The resulting flow rate-pressure drop correlations were found to satisfy the limitation of SMACNA standard, which specified an error of $\pm7.5\%$ based on the real flow rate. Also, the best one of five. cases was achieved with the orifice located midway of the orifice duct four times its diameter long.

Keywords

References

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