Abstract
In this paper we describe an approach for estimating unsteady flow rate through oil hydraulic pipelines and components in real time. Recently we have proposed following the three unsteady flow rate measurement approaches, RIFM, QIFM and TPFM, in which hydraulic pipeline dynamics are utilized. In this paper, we firstly propose new approaches, i.e., an interpolation method and an extrapolation method in combination with RIFM and TPFM. In the interpolation method, unsteady flow rate at an arbitrary internal location between two points along the pipeline for measuring the two-point pressure can be estimated. In the extrapolation method, unsteady flow rate can be estimated at an arbitrary point along the pipeline located in the outer region of the two points for measuring the two-point pressure. In this paper, the accuracy and the dynamic response of the interpolation method and the extrapolation method are experimentally investigated in detail.
