Open Channel Flowrate Measurement Using Multipath Acoustic Flowmetersby F. C. Lowell, Jr., Ferranti ORE Inc, Accusonic Div.,
R. M. Reynolds, Ferranti ORE Inc, Accusonic Div.,
R. H. Beede, Ferranti ORE Inc, Accusonic Div.,
Abstract: Recent acoustic flowmeter developments have improved the applicability and accuracy of the multipath acoustic measurement technique. Accuracy, hardware cost and calibration cost can be traded off to produce systems with single or multiple paths. These paths may be 'crossed' with additional paths to reduce errors resulting from uncertain velocity profiles and crossflow produced by upstream conditions. Typical system accuracies achievable are from 1 to 10% depending on operating requirements. Smart microprocessor-based electronics combined with flexible input/output capabilities allow standard designs to meet widely differing requirements. Several typical installations are described.
Subject Headings: Acoustic techniques | Velocity profile | Rivers and streams | Flow measurement | Calibration | Crossflow | Open channel flow | Flow profiles
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