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Unsteady Flow Rate Measurement Based on Distributed Parameter Pipeline Model  

Kim, Do-Tae (경일대학교 기계자동차학부)
Hong, Sung-Tae (동방바이오(주))
Publication Information
Transactions of the Korean Society of Machine Tool Engineers / v.17, no.3, 2008 , pp. 8-13 More about this Journal
Abstract
The paper proposes a model-based measurement of unsteady flow rate by using distributed parameter pipeline model and the measured pressure values at two distant points along the pipeline. The distributed parameter model of hydraulic pipeline is applied with consideration of frequency dependent viscosity friction and unsteady velocity distribution at a cross section of a pipeline. By using the self-diagnostics functions of the measurement method, the validity is investigated by comparison with the measured and estimated pressure and flow rate wave forms at the halfway section on the pipeline. The results show good agreement between the estimated flow rate wave forms and theoretical those under unsteady laminar flow conditions. The method proposed here is useful in estimating unsteady flow rate through an arbitrary cross section in hydraulic pipeline and components without installing an instantaneous flowmeter.
Keywords
Fluid Power Systems; Unsteady Flow Rate Measurement; Hydraulic Pipeline Dynamics; Distributed Parameter Model; Self-Diagnostic Function;
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