Patent ID: 6578414
Filing Date: 2003-06-17
Classification: G01F

Abstract:
A split-flow flowmeter for detecting a portion of flow diverted from a main-flow pipe into a split-flow passage, by use of a detection element facing the interior of the split-flow passage so as to measure a flow rate in the main-flow pipe, when a pulsating flow arises in the main-flow pipe, wherein:the split-flow passage assumes a flow path structure that is symmetrical with respect to a plane passing through the detection element and being parallel to a flow cross section of the main-flow pipe; a flow inlet and a flow outlet of the split-flow passage open in opposition to each other along a flow direction in the main-flow pipe and are symmetrically positioned with respect to the flow cross section of the main-flow pipe; a center of opening of the flow inlet and the flow outlet of the split-flow passage is positioned between a center of the flow cross section of the main-flow pipe and an average-flow-velocity position at which flow in the main-flow pipe is of an average flow velocity, as observed on the flow cross section of the main-flow pipe, whereby a regular-flow component and a backflow component of the pulsating flow arising in the main-flow pipe can be measured equivalently.