Velocity based method for determining air-fuel ratio of a...

Measuring and testing – Volume or rate of flow – Using differential pressure

Reexamination Certificate

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Reexamination Certificate

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07810400

ABSTRACT:
A method for determining one or more fluid flow parameters for a fluid flowing within a pipe is provided. The fluid is a mixture of solid particles and gas. The method includes the steps of: a) providing a meter operable to determine the velocity of the fluid flow through the pipe, which meter is substantially insensitive to the particulate/gas mass ratio of the fluid flow; b) determining the velocity of the fluid flow within the pipe using the meter; and c) determining a particulate/gas mass ratio using a density value for the gas within the flow and the determined fluid flow velocity.

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Sanderson et al. “Guidelines for the Use of Ultrasonic Non-Invasive Metering Techniques”, Flow Measurement and Instrumentation, Jul. 17, 2002, pp. 125-142.

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