Method and device for determining the instantaneous mass...

Details Method and device for determining the instantaneous mass... Method and device for determining the instantaneous mass...

2011-02-01

2011-02-01

Bui, Bryan (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Mechanical measurement system

C123S494000

Reexamination Certificate

active

07881885

ABSTRACT:
The invention relates to a method for determining the instantaneous rate of the mass flow of a flow of a fluid pulsating periodically at a frequency f, said method comprising the following steps: a) a pressure gradient in the flow over a certain period (P) is determined, b) the harmonic amplitude of the pressure gradient is calculated by means of Fourier transformation, c) the frequency f and the time t are converted into dimensionless numbers F, t and d) the rate of the mass flow is determined using a table from which at least one corresponding value describing the mass flow rate and/or a phase difference can be deduced for each dimensionless number F of the frequency f.

REFERENCES:
patent: 5228336 (1993-07-01), Nagaishi
patent: 6510842 (2003-01-01), Ismailov
patent: 6874489 (2005-04-01), Yonekawa et al.
patent: 2002/0014224 (2002-02-01), Ismailov
S. Ray et al; “Mass Flow Rate Controlled Fully Developed Laminar Pulsating Pipe Flows” Journal of Fluids Engineering, vol. 127, May 2005, pp. 405-418.

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