scholarly journals Unsteady Flow Rate Measurement of Air Using Isothermal Chamber

1997 ◽  
Vol 33 (3) ◽  
pp. 149-154 ◽  
Author(s):  
Kenji KAWASHIMA ◽  
Toshinori FUJITA ◽  
Toshiharu KAGAWA
Keyword(s):  
Unsteady Flow ◽  
Flow Rate ◽  
Rate Measurement ◽  
Flow Rate Measurement

Use of Pipeline Wave Propagation Model for Measuring Unsteady Flow Rate

2014 ◽  
Vol 136 (3) ◽  
Author(s):  
Nigel Johnston ◽  
Min Pan ◽  
Sylwester Kudzma ◽  
Pengfei Wang
Keyword(s):  
Wave Propagation ◽  
Unsteady Flow ◽  
Flow Rate ◽  
Propagation Model ◽  
Rate Measurement ◽  
Pressure Data ◽  
Flow Rate Measurement ◽  
High Bandwidth ◽  
Novel Method ◽  
Wave Propagation Model

A novel method for estimation of unsteady flow rate using pressure at two or three points along a pipeline is described in this paper. The pressure data are processed using a wave propagation model to determine the unsteady flow. The comparison and analysis of two-transducer and three-transducer techniques are investigated through simulation. The proposed method is shown to be effective for unsteady flow rate measurement over a high bandwidth. However, if the pressure values from two transducers are used, inaccuracies exist at certain frequencies when the transducer spacing coincides with multiples of half a wavelength. The accuracy can be improved by adding a third transducer with unequal spacing. The three-transducer method has been implemented in experiments and has been found to be robust and reliable.

Invariant method for measuring wet gas flow rate

2021 ◽  
pp. 13-19
Author(s):  
Zhanat А. Dayev ◽  
Gulzhan E. Shopanova ◽  
Bakytgul А. Toksanbaeva
Keyword(s):  
Flow Rate ◽  
Measurement System ◽  
Flow Measurement ◽  
Gas Flow ◽  
Test Results ◽  
Invariant System ◽  
Rate Measurement ◽  
Gas Flow Rate ◽  
Flow Rate Measurement ◽  
Wet Gas

The article deals with one of the important tasks of modern flow measurement, which is related to the measurement of the flow rate and the amount of wet gas. This task becomes especially important when it becomes necessary to obtain information about the separate amount of the dry part of the gas that is contained in the form of a mixture in the wet gas stream. The paper presents the principle of operation and structure of the invariant system for measuring the flow rate of wet gas, which is based on the combined use of differential pressure flowmeters and Coriolis flowmeters. The operation of the invariant wet gas flow rate measurement system is based on the simultaneous application of the multichannel principle and the partial flow measurement method. Coriolis flowmeters and the differential pressure flowmeter are used as the main elements of the system. The proposed measurement system does not offer applications for gases with abundant drip humidity. The article provides information about the test results of the proposed invariant system. The estimation of the metrological characteristics of the invariant system when measuring the flow rate of wet gas is given. The obtained test results of the invariant wet gas flow rate measurement system are relevant for natural gas production, transportation, and storage facilities.

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