Journal of Hydrodynamics, Journal Year: 2024, Volume and Issue: unknown
Published: Nov. 8, 2024
Language: Английский
Experimental and Computational Multiphase Flow, Journal Year: 2024, Volume and Issue: 6(4), P. 287 - 352
Published: Oct. 23, 2024
Language: Английский
Citations
9
Physics of Fluids, Journal Year: 2023, Volume and Issue: 35(6)
Published: June 1, 2023
The mixed-flow pump performs well in transporting gas–liquid mixtures with large flow rates and high inlet gas volume fractions. However, its extensive development is still limited by the operating range poor overall performance. In this study, a multiobjective multicondition optimization methodology for improving performance of based on inverse design proposed. impeller blade load taken as variable. Moreover, Euclidean distances pressure increment, efficiency, fraction diffuser are adopted objectives. Results show that numerical verified increment distribution obtained tests original pump. Optimized results demonstrate slope straight line, stacking angle at hub, intersection point rear parabola line significantly affect increased first half reduced second may improve comprehensive pumps. length wrap after optimization, which changes outlet angles deflection blade, thereby helping to enhance cognition optimization.
Language: Английский
Citations
14
Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(2)
Published: Feb. 1, 2024
The rotors of twin-screw pumps would be worn by hard particles for deep-sea oil and gas mixture transport. It led to the destruction seal clearance deterioration pump performance. Based on Euler–Lagrange method dynamic grid technology, transient numerical simulation solid–liquid two-phase flow in a was carried out validated experiment. motion characteristics tip, interlobe, flank clearance, causes rotor wear were clarified. results revealed that severe at tips caused when they enter tip rather than leaving with leakage jet flow. Particles passing through had high velocity contributed tips. main tooth chamber disturbed interlobe leakage, even resulting local high-speed reflux near engagement. With increase particle concentration diameter, collision frequency between increased, aggravating risk research could reveal nature following liquid phase their mechanism pumps.
Language: Английский
Citations
4
Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(2)
Published: Feb. 1, 2024
The flow in mixed-flow pumps under gas–liquid operating conditions is complex, involving special phenomena such as secondary and bubble breakup coalescence. As a result, its pressure fluctuation characteristic far different from that pure water conditions. In this work, the energy performance, characteristics, pattern inlet gas volume fractions (IGVFs) are studied through visualization test pump. air pocket forms easily close to suction side of diffuser vanes, where two monitoring points set up. increment decreases continuously when IGVF increases, shows transition bubble, condensed separated flow. Moreover, amplitude peak-to-peak values increase. main frequency IGVFs maintained blade passing frequency. When increases 15%, at P1 reaches maximum, which 2.24 times condition. Some amplitudes one fluctuate higher than 10%. findings contribute theoretical support improving stability multiphase pumps.
Language: Английский
Citations
4
Physics of Fluids, Journal Year: 2023, Volume and Issue: 35(10)
Published: Oct. 1, 2023
To study the energy loss characteristics of a semi-open mixed-flow multiphase pump, an improved entropy generation theory considering slip velocity was established to locate local areas with high loss. The relationships among generation, phase interface wall and unstable flow were analyzed for each component. results showed that magnitude similar turbulent which could not be ignored. mainly distributed at leading edge, trailing hub, blade tip clearance. With increased inlet gas volume fraction, proportion interfacial production total increased. As fraction 30%, accounted 70% edge 63% edge. zone clearance region began extend from pressure side suction blade. During evolution leakage vortex, stretching, breakup–regeneration stages accompanied by large generation.
Language: Английский
Citations
10
SPE Journal, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 16
Published: Jan. 1, 2025
Summary Gas-liquid two-phase mixed-flow transportation is a critical factor that reduces the hydraulic performance and stability of electrical submersible pumps (ESPs). Therefore, this study proposed semi-open-type multistage ESPs to improve their ability handle gas-liquid transportation. The ESPs’ was predicted using nonhomogeneous Euler-Euler two-fluid model combined with multiple-size-group (MUSIG) at various inlet gas volume fraction (IGVF) conditions. accuracy simulation verified experimental results. results explored influence different tip clearance sizes on energy characteristics internal unstable flow ESPs. show semi-open impellers improved working performance. When IGVF = 5%, scheme 0.2 mm had certain advantages. 10%, scheme’s benefit 0.4 more prominent. significantly state in first-stage impeller channels reduced interstage differences. loss caused by bubbly coalescence decreased due enhanced turbulence intensity leakage flow. leading cause current high turbulent kinetic (TKE) area rolling-up effect Under conditions, bubbles occurred degrees breakup. theoretical basis optimization direction are provided
Language: Английский
Citations
0
Progress in Nuclear Energy, Journal Year: 2025, Volume and Issue: 185, P. 105783 - 105783
Published: April 10, 2025
Language: Английский
Citations
0
Renewable Energy, Journal Year: 2025, Volume and Issue: unknown, P. 122998 - 122998
Published: April 1, 2025
Language: Английский
Citations
0
Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(5)
Published: May 1, 2025
A blade-type multiphase pump is a specialized piece of rotating machinery that offers significant advantages when transporting gas–liquid two-phase flows with high gas volume fractions. However, accurately predicting bubble evolution under these conditions remains challenging. In this work, we expand upon established simulation methods—multiple size group (MUSIG) and average number density (ABND)—by combining them high-speed imaging data to refine key model parameters. Unlike standard implementations, specifically adjust the ABND coalescence coefficient (CRC) based on experimental observations, targeting pumps at higher inlet fractions (IGVF). At low IGVF (<0.1), both models capture flow structures boosting performance. As increases 0.1–0.4, transitions from slug flow, forming cavities. Under conditions, more reliably predicts diameters high-gas regions compared MUSIG. By tuning CRC 0.027, accuracy (0.3–0.37) improves further, aligning closely data. These findings not only validate enhanced usage MUSIG but also offer practical guidance for optimizing design in environments.
Language: Английский
Citations
0
Ocean Engineering, Journal Year: 2024, Volume and Issue: 294, P. 116803 - 116803
Published: Jan. 25, 2024
Language: Английский
Citations
3