For the overall superficial velocity non-disturbance measurement of oil-water two-phase flow in horizontal pipeline, a measurement method based on dual-mode of ultrasonic and electrical is proposed. A system combined continuous-wave ultrasonic Doppler sensors and conductance/capacitance sensors is used to estimate the velocity and holdup of two phase flow. Because the continuous-wave ultrasonic Doppler measurement region is concentrated in the pipe center, the holdup distribution and the velocity profile will lead to the difference between flow velocity obtained by Doppler shift and the overall superficial velocity. On the assumption that the holdup distribution satisfies Gauss distribution, establish the modified Doppler power spectrum model. The influence of the holdup is considered, then the models of calculating overall superficial velocity and phase superficial velocity are determined. Based on experiments, the parameters of the calculation model are determined respectively under different continuous phases. The experimental results show that the superficial flow velocities calculated by the model are in good agreement with the actual flow velocities. The relative error of the overall superficial velocity is less than 6.32%, and root mean square error of phase superficial velocity is within 5.64%.
SHI Xuewei
,
TAN Chao
,
DONG Xiaoxiao
,
DONG Feng
. Oil-water Two-phase Flow Velocity Measurement Based on Ultrasonic Doppler Spectrum Correction[J]. Journal of Mechanical Engineering, 2017
, 53(24)
: 77
-84
.
DOI: 10.3901/JME.2017.24.077
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