Study on the Gas-liquid Swirling Annulus Flow with the Vortex Tool

doi:10.11885/j.issn.1674-5086.2019.04.17.02

Abstract

Abstract: In order to explain the unloading effect of vortex tools, it is necessary to establish a gas-liquid two-phase flow model in accordance with its flow law. Considering the existence of angular velocity in vortex flow, this research adopts the radial and circumferential momentum and angular momentum balance of gas-liquid flow, the governing equation of gas-liquid flow and the parameters such as liquid film thickness, gas-liquid vortex intensity and pressure drop gradient are obtained. The vortex flow experiments are conducted to verify the model. The results of model calculation and experiment show that the pressure drop of gas-liquid flow can be reduced by 5%~20% after the vortex tool, and the mechanism of reducing pressure drop loss by vortex tools is also given. According to experiments and models, it can be concluded that small vortex angle and high vortex intensity tend to reduce pressure drop at low velocity(gas velocity is less than 13 m/s), while high vortex intensity increases additional friction resistance at high velocity(gas velocity is faster than 16 m/s). The decay rate of vortex intensity decreases with the rise of liquid phase velocity and increases with the rise of gas phase velocity. Therefore, based on the research, vortex tools can be optimized to achieve the best liquid unloading effect.

Key words: liquid unloading, vortex tool, gas-liquid two phase flow, gas-liquid annulus flow, vortex flow coefficient

CLC Number:

TE355

SHI Shuzhe, HAN Guoqing, WU Xiaodong, ZHONG Ziyao, LU Kuan. Study on the Gas-liquid Swirling Annulus Flow with the Vortex Tool[J]. 西南石油大学学报(自然科学版), 2020, 42(3): 170-178.

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URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.11885/j.issn.1674-5086.2019.04.17.02

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