The measurement of low air flow velocities

A. Aghaei; X.G. Mao; A.J.J. Zanden, van der; W.H.J. van Schaik; N.A. Hendriks

The measurement of low air flow velocities

A. Aghaei
, X.G. Mao
, A.J.J. Zanden, van der
, W.H.J. van Schaik
, N.A. Hendriks

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic

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Abstract

Air flow velocity is measured with an acoustic sensor, which can be used especially for measuring low air flow velocities as well as the temperature of the air simultaneously. Two opposite transducers send a sound pulse towards each other. From the difference of the transit times, the air flow velocity is computed. With this method, it is possible to determine the flow direction even at low velocities. Two calibration methods are carried out. First, a set of calibration experiments is carried out in a wind tunnel, in which a uniform air flow is generated. In the centre of the wind tunnel, the sensor and a reference speedometer of Pitot tube are installed to measure the air flow velocity independently. Second, a set of calibration experiments for low air flow velocity is performed with the acoustic sensor in amoving tube with a controlled velocity. The sensor shows good and accurate results corresponding to the speed of the tube.

Original language	English
Title of host publication	10th International Conference on Indoor Air Quality and Climate
Chapter	5
Number of pages	3380
Publication status	Published - 2005
Event	10th International Conference on Indoor Air Quality and Climate (Indoor Air 2005), September 4-9, 2005, Beijing, China - Tsinghua University, Beijing, China Duration: 4 Sept 2005 → 9 Sept 2005

Conference

Conference	10th International Conference on Indoor Air Quality and Climate (Indoor Air 2005), September 4-9, 2005, Beijing, China
Abbreviated title	Indoor Air 2005
Country/Territory	China
City	Beijing
Period	4/09/05 → 9/09/05

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@inproceedings{a0c945b9acdd46ba812a4eb9a2088522,

title = "The measurement of low air flow velocities",

abstract = "Air flow velocity is measured with an acoustic sensor, which can be used especially for measuring low air flow velocities as well as the temperature of the air simultaneously. Two opposite transducers send a sound pulse towards each other. From the difference of the transit times, the air flow velocity is computed. With this method, it is possible to determine the flow direction even at low velocities. Two calibration methods are carried out. First, a set of calibration experiments is carried out in a wind tunnel, in which a uniform air flow is generated. In the centre of the wind tunnel, the sensor and a reference speedometer of Pitot tube are installed to measure the air flow velocity independently. Second, a set of calibration experiments for low air flow velocity is performed with the acoustic sensor in amoving tube with a controlled velocity. The sensor shows good and accurate results corresponding to the speed of the tube.",

author = "A. Aghaei and X.G. Mao and \{Zanden, van der\}, A.J.J. and \{van Schaik\}, W.H.J. and N.A. Hendriks",

year = "2005",

language = "English",

booktitle = "10th International Conference on Indoor Air Quality and Climate",

note = "10th International Conference on Indoor Air Quality and Climate (Indoor Air 2005), September 4-9, 2005, Beijing, China, Indoor Air 2005 ; Conference date: 04-09-2005 Through 09-09-2005",

}

TY - GEN

T1 - The measurement of low air flow velocities

AU - Aghaei, A.

AU - Mao, X.G.

AU - Zanden, van der, A.J.J.

AU - van Schaik, W.H.J.

AU - Hendriks, N.A.

PY - 2005

Y1 - 2005

N2 - Air flow velocity is measured with an acoustic sensor, which can be used especially for measuring low air flow velocities as well as the temperature of the air simultaneously. Two opposite transducers send a sound pulse towards each other. From the difference of the transit times, the air flow velocity is computed. With this method, it is possible to determine the flow direction even at low velocities. Two calibration methods are carried out. First, a set of calibration experiments is carried out in a wind tunnel, in which a uniform air flow is generated. In the centre of the wind tunnel, the sensor and a reference speedometer of Pitot tube are installed to measure the air flow velocity independently. Second, a set of calibration experiments for low air flow velocity is performed with the acoustic sensor in amoving tube with a controlled velocity. The sensor shows good and accurate results corresponding to the speed of the tube.

AB - Air flow velocity is measured with an acoustic sensor, which can be used especially for measuring low air flow velocities as well as the temperature of the air simultaneously. Two opposite transducers send a sound pulse towards each other. From the difference of the transit times, the air flow velocity is computed. With this method, it is possible to determine the flow direction even at low velocities. Two calibration methods are carried out. First, a set of calibration experiments is carried out in a wind tunnel, in which a uniform air flow is generated. In the centre of the wind tunnel, the sensor and a reference speedometer of Pitot tube are installed to measure the air flow velocity independently. Second, a set of calibration experiments for low air flow velocity is performed with the acoustic sensor in amoving tube with a controlled velocity. The sensor shows good and accurate results corresponding to the speed of the tube.

M3 - Conference contribution

BT - 10th International Conference on Indoor Air Quality and Climate

T2 - 10th International Conference on Indoor Air Quality and Climate (Indoor Air 2005), September 4-9, 2005, Beijing, China

Y2 - 4 September 2005 through 9 September 2005

ER -

The measurement of low air flow velocities

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