Indexed by:期刊论文

Date of Publication:2017-07-01

Journal:MEASUREMENT SCIENCE AND TECHNOLOGY

Included Journals:SCIE、EI、Scopus

Volume:28

Issue:7

ISSN No.:0957-0233

Key Words:airflow measurement; averaging Pitot tube; numerical simulation; experimental method

Abstract:Averaging Pitot tubes have been widely used in many fields because of their simple structure and stable performance. This paper introduces a new shape of the cross-section of an averaging Pitot tube. Firstly, the structure of the averaging Pitot tube and the distribution of pressure taps are given. Then, a mathematical model of the airflow around it is formulated. After that, a series of numerical simulations are carried out to optimize the geometry of the tube. The distribution of the streamline and pressures around the tube are given. To test its performance, a test platform was constructed in accordance with the relevant national standards and is described in this paper. Curves are provided, linking the values of flow coefficient with the values of Reynolds number. With a maximum deviation of only +/- 3%, the results of the flow coefficient obtained from the numerical simulations were in agreement with those obtained from experimental methods. The proposed tube has a stable flow coefficient and favorable metrological characteristics.