A novel acoustic method for gas flow measurement using correlation techniques

Dissertation

Matti Knuuttila

Research output: ThesisDissertationMonograph

Abstract

The study demonstrates a new kind of acoustic method for gas flow measurement. The method uses upstream and downstream propagating low frequency plane wave and correlation techniques for volume flow rate determination. The theory of propagating low frequency plane waves in the pipe is introduced and is proved empirically to be applicable for flow measurement. The flow profile dependence of the method is verified and found to be negligible at least in the region of moderate perturbations. The physical principles of the method were applied in practice in the form of a flowmeter with new design concepts. The developed prototype meters were verified against the reference standard of NMI (Nederlands Meetinstituut), which showed that a wide dynamic range of 1:80 is achievable with total expanded uncertainty below 0.3%. Also the requirements used for turbine meters of linearity, weighted mean error and stability were shown to be well fulfilled. A brief comparison with other flowmeter types shows the new flowmeter to be competitive. The advantages it offers are a small pressure drop over the meter, no blockage of flow in possible malfunction, no pulsation to flow, essentially no moving parts, and the possibility for bidirectional measurements. The introduced flowmeter is also capable of using the telephone network or a radio-modem to read the consumption of gas and report its operation to the user.
Original languageEnglish
QualificationDoctor Degree
Awarding Institution
  • University of Helsinki
Award date14 Nov 1997
Place of PublicationEspoo
Publisher
Print ISBNs951-38-5203-2
Publication statusPublished - 1997
MoE publication typeG4 Doctoral dissertation (monograph)

Fingerprint

Gas fuel measurement
Flowmeters
Flow measurement
Flow of gases
Acoustics
Modems
Telephone
Pressure drop
Turbines
Pipe
Flow rate
Gases

Keywords

  • gas flow
  • flow measurement
  • flowmeters
  • acoustic measurement
  • correlation techniques

Cite this

Knuuttila, M. (1997). A novel acoustic method for gas flow measurement using correlation techniques: Dissertation. Espoo: VTT Technical Research Centre of Finland.
Knuuttila, Matti. / A novel acoustic method for gas flow measurement using correlation techniques : Dissertation. Espoo : VTT Technical Research Centre of Finland, 1997. 80 p.
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title = "A novel acoustic method for gas flow measurement using correlation techniques: Dissertation",
abstract = "The study demonstrates a new kind of acoustic method for gas flow measurement. The method uses upstream and downstream propagating low frequency plane wave and correlation techniques for volume flow rate determination. The theory of propagating low frequency plane waves in the pipe is introduced and is proved empirically to be applicable for flow measurement. The flow profile dependence of the method is verified and found to be negligible at least in the region of moderate perturbations. The physical principles of the method were applied in practice in the form of a flowmeter with new design concepts. The developed prototype meters were verified against the reference standard of NMI (Nederlands Meetinstituut), which showed that a wide dynamic range of 1:80 is achievable with total expanded uncertainty below 0.3{\%}. Also the requirements used for turbine meters of linearity, weighted mean error and stability were shown to be well fulfilled. A brief comparison with other flowmeter types shows the new flowmeter to be competitive. The advantages it offers are a small pressure drop over the meter, no blockage of flow in possible malfunction, no pulsation to flow, essentially no moving parts, and the possibility for bidirectional measurements. The introduced flowmeter is also capable of using the telephone network or a radio-modem to read the consumption of gas and report its operation to the user.",
keywords = "gas flow, flow measurement, flowmeters, acoustic measurement, correlation techniques",
author = "Matti Knuuttila",
note = "Project code: K7SU00287",
year = "1997",
language = "English",
isbn = "951-38-5203-2",
series = "VTT Publications",
publisher = "VTT Technical Research Centre of Finland",
number = "327",
address = "Finland",
school = "University of Helsinki",

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Knuuttila, M 1997, 'A novel acoustic method for gas flow measurement using correlation techniques: Dissertation', Doctor Degree, University of Helsinki, Espoo.

A novel acoustic method for gas flow measurement using correlation techniques : Dissertation. / Knuuttila, Matti.

Espoo : VTT Technical Research Centre of Finland, 1997. 80 p.

Research output: ThesisDissertationMonograph

TY - THES

T1 - A novel acoustic method for gas flow measurement using correlation techniques

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N2 - The study demonstrates a new kind of acoustic method for gas flow measurement. The method uses upstream and downstream propagating low frequency plane wave and correlation techniques for volume flow rate determination. The theory of propagating low frequency plane waves in the pipe is introduced and is proved empirically to be applicable for flow measurement. The flow profile dependence of the method is verified and found to be negligible at least in the region of moderate perturbations. The physical principles of the method were applied in practice in the form of a flowmeter with new design concepts. The developed prototype meters were verified against the reference standard of NMI (Nederlands Meetinstituut), which showed that a wide dynamic range of 1:80 is achievable with total expanded uncertainty below 0.3%. Also the requirements used for turbine meters of linearity, weighted mean error and stability were shown to be well fulfilled. A brief comparison with other flowmeter types shows the new flowmeter to be competitive. The advantages it offers are a small pressure drop over the meter, no blockage of flow in possible malfunction, no pulsation to flow, essentially no moving parts, and the possibility for bidirectional measurements. The introduced flowmeter is also capable of using the telephone network or a radio-modem to read the consumption of gas and report its operation to the user.

AB - The study demonstrates a new kind of acoustic method for gas flow measurement. The method uses upstream and downstream propagating low frequency plane wave and correlation techniques for volume flow rate determination. The theory of propagating low frequency plane waves in the pipe is introduced and is proved empirically to be applicable for flow measurement. The flow profile dependence of the method is verified and found to be negligible at least in the region of moderate perturbations. The physical principles of the method were applied in practice in the form of a flowmeter with new design concepts. The developed prototype meters were verified against the reference standard of NMI (Nederlands Meetinstituut), which showed that a wide dynamic range of 1:80 is achievable with total expanded uncertainty below 0.3%. Also the requirements used for turbine meters of linearity, weighted mean error and stability were shown to be well fulfilled. A brief comparison with other flowmeter types shows the new flowmeter to be competitive. The advantages it offers are a small pressure drop over the meter, no blockage of flow in possible malfunction, no pulsation to flow, essentially no moving parts, and the possibility for bidirectional measurements. The introduced flowmeter is also capable of using the telephone network or a radio-modem to read the consumption of gas and report its operation to the user.

KW - gas flow

KW - flow measurement

KW - flowmeters

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KW - correlation techniques

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Knuuttila M. A novel acoustic method for gas flow measurement using correlation techniques: Dissertation. Espoo: VTT Technical Research Centre of Finland, 1997. 80 p.