Abstract
An ultrasonic Doppler method is proposed for investigating the two-phase slug flow in a hilly terrain pipeline. To obtain the distribution of the velocity and gas–liquid interface, the velocity profile and echo profile of the slug flow were measured via ultrasonic Doppler velocimetry (UDV) with and without the addition of tracer particles in the liquid phase, respectively. An individual 8 MHz transducer with a diameter of 3 mm and an individual 2 MHz transducer with a diameter of 5 mm were employed for the liquid film and liquid slug measurement respectively. Using MATLAB programs based on the measured data, the investigation of the flow characteristics of the slug flow was divided into three parts: the liquid film, the front of the liquid slug, and the center of the liquid slug. The statistical analysis of the average length of every part indirectly reflected the formation and development behavior of the slug flow. The characteristic parameters of the gas–liquid interface, such as the thickness of the liquid film and the bubble distribution in the liquid slug, were extracted from the echo signals. The boundary layer of the liquid film was extracted from the velocity profiles. The average value and variation coefficient of the velocity profile were calculated for the liquid film and the center of the liquid slug. The effects of the superficial velocities and measured positions on the aforementioned flow parameters were examined. The UDV measurement and relevant data processing offer an effective method for the non-intrusive investigation of the slug flow in a hilly terrain pipeline.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
