Dipleg Flow Regimes and Modeling for FCC Riser Terminations

Bayle, Jérôme; Leroy, Patrick; Gauthier, Thierry

doi:10.1002/1522-2640(200106)73:6<669::aid-cite6691111>3.0.co;2-0

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“…But in non-intrusive techniques, the measurement signals are captured by the sensors mounted out of the flow (Wang et al 2009). Intrusive measurement probes exist in different sorts including capacitance probe (Geldart and Kelsey 1972;Shi et al 1991;Sharma et al 2000), optical fiber probe (Yasui and Johanson 1958;Bayle et al 2001;Cui and Chaouki 2004), endoscopic probe (Peters et al 1983), and pressure transducer probe (Lirag and Littman 1971;Fan et al 1981;Sitnai 1982). The intrusive measurement systems are mostly used in fluidized beds.…”

Section: Introductionmentioning

confidence: 99%

Measuring the Taylor Bubble Length in a Two-Phase Flow using an Electrical Resistance Sensor and a High-Speed Camera

2023

JAFM

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The present research aims to investigate the two-phase air/water flow in a vertical pipe using an electrical resistance sensor and a high-speed camera. An electrical resistance sensor is designed and embedded in the inner wall of the tube. A flow pattern map is drawn at the height of 270 cm from the testbed inlet for 320 different phase velocities using a high-speed camera. By measuring the output voltage of the electrical resistance sensor and using the Maxwell relation, the volume fraction in bubbly and slug flow regimes are calculated for different phase velocities. The volume fraction values detected from the output signal of the electrical resistance sensor are compared with the results obtained from the high-speed camera images. The width of the output signal from the electrical resistance sensor indicates the length of the Taylor bubble. The output signal width is compared to the obtained Taylor bubble length from high-speed camera images, for several different velocities of the phases. It is noticed that at a constant velocity of the phases, the output signal width from the sensor is linearly related to the length of the Taylor bubble. The variations of the output signal width are plotted in terms of the ratio of the Taylor bubble length to the summation of air and water superficial velocities. By linear fitting of the available data, a novel equation is presented to calculate the Taylor bubble length in terms of the signal output from the electrical resistance sensor and the total superficial velocity of the phases.

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Section: Introductionmentioning

confidence: 99%

Measuring the Taylor Bubble Length in a Two-Phase Flow using an Electrical Resistance Sensor and a High-Speed Camera

2023

JAFM

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Dipleg Flow Regimes and Modeling for FCC Riser Terminations

Abstract: J e Â r o Ã m e B a y l e P a t r i c k L e r o y T h i e r r y G a u t h i e r

Cited by 1 publication

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Measuring the Taylor Bubble Length in a Two-Phase Flow using an Electrical Resistance Sensor and a High-Speed Camera

Measuring the Taylor Bubble Length in a Two-Phase Flow using an Electrical Resistance Sensor and a High-Speed Camera

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