Effect of pressure fluctuation in oil-gas multiphase pump on cavitation and performance of sealing liquid film

2022 ◽  
Vol 210 ◽  
pp. 110074
Author(s):  
Jinya Zhang ◽  
Jiaxiang Zhang ◽  
Qingping Li ◽  
Chang Gao ◽  
Ziyiyi Cheng
Keyword(s):  
Liquid Film ◽  
Pressure Fluctuation ◽  
Multiphase Pump ◽  
Effect Of Pressure ◽  
And Performance ◽  
Oil Gas

Effect of pressure on the properties of a NASICON Li1.3Al0.3Ti1.7(PO4)3 nanofiber solid electrolyte

2021 ◽  
Author(s):  
Andrea La Monaca ◽  
Gabriel Girard ◽  
Sylvio Savoie ◽  
Hendrix Demers ◽  
Giovanni Bertoni ◽  
...  
Keyword(s):  
Solid Electrolyte ◽  
Effect Of Pressure ◽  
And Performance

We report the effect of pressure on a membrane made of dense electrospun NASICON-like Li1.3Al0.3Ti1.7(PO4)3 (LATP). The properties and performance of the pressed LATP nanofibers were investigated and compared with...

scholarly journals Phase Distribution in the Tip Clearance of a Multiphase Pump at Multiple Operating Points and Its Effect on the Pressure Fluctuation Intensity

Processes ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 556
Author(s):  
Guangtai Shi ◽  
Zongku Liu ◽  
Xiaobing Liu ◽  
Yexiang Xiao ◽  
Xuelin Tang
Keyword(s):  
Phase Velocity ◽  
Pressure Fluctuation ◽  
Phase Distribution ◽  
Tip Clearance ◽  
Tip Leakage Flow ◽  
Two Phase ◽  
Multiphase Pump ◽  
Fluctuation Intensity ◽  
Operating Points ◽  
Multiple Operating Points

Tip clearance has a great effect on the flow and pressure fluctuation characteristics in a multiphase pump, especially at multiple operating points. The phase distribution and pressure fluctuation in tip clearance in a multiphase pump are revealed using the CFD (computational fluid dynamics) technology and high-speed photography methods. In this paper, the phase distribution, the gas-liquid two-phase velocity slip, and the pressure fluctuation intensity are comprehensively analyzed. Results show with the increase of the tip clearance, the multiphase pump pressurization performance is obviously deteriorated. In the meantime, the gas accumulation mainly occurs at the hub, the blade suction side (SS), and the tip clearance, and the maximum gas-liquid two-phase velocity difference is near the impeller streamwise of 0.4. In addition, the tip clearance improves the gas-liquid two-phase distribution in the pump, that is, the larger the tip clearance is, the more uniform the gas-liquid distribution becomes. Furthermore, the gas leads to the maximum pressure fluctuation intensity in the tip clearance which is closer to the tip leakage flow (TLF) outlet, and has a greater effect on the degree of flow separation in the tip clearance.

scholarly journals Effect of Dam Depth and Relief Track Depth on Steady-State and Dynamic Performance Parameters of 3-Lobe Pressure Dam Bearing

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Ashutosh Kumar ◽  
S. K. Kakoty
Keyword(s):  
Steady State ◽  
Dynamic Performance ◽  
Performance Characteristics ◽  
Performance Parameters ◽  
Effect Of Pressure ◽  
And Performance

The present study analyzes the effect of pressure dam depth and relief track depth on the performance of three-lobe pressure dam bearing. Different values of dam depth and relief track depth are taken in nondimensional form in order to analyze their effect. Results are plotted for different parameters against eccentricity ratios and it is shown that the effect of pressure dam depth and relief track depth has great significance on stability and other performance parameters. Study of stability and performance characteristics is undertaken simultaneously.

scholarly journals The two-phase flow analysis of helico-axial oil-gas multiphase pump for offshore oil fields

2018 ◽  
Vol 163 ◽  
pp. 012015
Author(s):  
S Y Li ◽  
J Zhang ◽  
X P Jiang ◽  
H Zhu ◽  
Y X Xiao ◽  
...  
Keyword(s):  
Two Phase Flow ◽  
Flow Analysis ◽  
Oil Fields ◽  
Phase Flow ◽  
Two Phase ◽  
Multiphase Pump ◽  
Offshore Oil ◽  
Oil Gas

A Comparison of Oil-Water Flow and Oil-Gas Flow in Capillary Model

2012 ◽  
Author(s):  
Yihe Zhang ◽  
Liming Dai
Keyword(s):  
Pressure Drop ◽  
Liquid Film ◽  
Gas Flow ◽  
Capillary Flow ◽  
Flow Behavior ◽  
Thin Liquid Film ◽  
Flow Process ◽  
Capillary Model ◽  
Oil Water ◽  
Oil Gas

A capillary model is employed to study the slug flow behavior in pore structure. Oil-water system and oil-gas system are investigated in the experiments. During the flow process, it is observed that the wetting phase liquid will generate a thin liquid film on the inner surface of the tube wall, and the liquid film plays an important role in capillary flow. At the meantime, the pressure drop across the tube is recorded during the experiment, result shows that the pressure drop magnitude is proportional to the oil slug length, while it is not significantly affected by the liquid injecting velocity.

API 617’s Requirements on Centrifugal Compressors: A Purchaser’s Viewpoint

2008 ◽  
Author(s):  
Mahdi Taherimoghaddam
Keyword(s):  
Petrochemical Industry ◽  
American Petroleum Institute ◽  
Centrifugal Compressors ◽  
Delivery Times ◽  
Operating Expenditures ◽  
And Performance ◽  
Oil Gas ◽  
Critical Sections ◽  
Specific Project

Centrifugal compressor’s long delivery times as well as high capital and operating expenditures have classified them as projects critical equipment. Purchasers normally employ American Petroleum Institute (API) standard API 617 as the convenient backbone for customizing their centrifugal compressor’s purchasing specification within oil, gas, and petrochemical industry. Centrifugal compressor’s mechanical and performance integrity guaranteed by the manufacturer at the contract stage is based on purchaser’s specific project requirements reflected in material requisition. Accordingly, purchasers share the responsibility of a suitable design. Among those API 617 clauses applicable to centrifugal compressors, some of them require purchaser’s decision on certain details and features, which should be finalized prior to order placement. It is tried to provide a perspective of the latest edition of API 617 (July 2002) as it is applied to centrifugal compressors from a purchaser’s viewpoint. Moreover, it attempts to address critical sections of the standard and share practical comments on specific clauses.

scholarly journals Effect of Gas Volume Fraction on the Gas-Phase Distribution in the Passage and Blade Surface of the Axial Flow Screw-Type Oil-Gas Multiphase Pump

Processes ◽  
2021 ◽  
Vol 9 (5) ◽  
pp. 760
Author(s):  
Guangtai Shi ◽  
Sijia Tao ◽  
Xiaobing Liu ◽  
Haigang Wen ◽  
Zekui Shu
Keyword(s):  
Gas Phase ◽  
Volume Fraction ◽  
Phase Distribution ◽  
Axial Flow ◽  
Distribution Area ◽  
Phase Volume ◽  
Multiphase Pump ◽  
Gas Volume Fraction ◽  
Gas Volume ◽  
Oil Gas

The axial flow screw-type oil-gas multiphase pump is mainly applied to oil and gas transport in the deep sea. In the process of transporting the multiphase medium, the gas volume fraction (GVF) on the gas phase changes from time-to-time, resulting in the performance of the oil-gas multiphase pump being greatly influenced by the gas phase. This paper presents a detailed analysis of the gas-phase distribution law and the vortex distribution in the flow passages within the oil-gas multiphase pump by means of numerical calculations, supplemented by experimental verification. The results show that the gas phase is mainly concentrated in the diffuser at different GVFs, and the gas phase gathering in the diffuser becomes more significant with the increase in the GVF. The gas-phase volume fraction increases gradually from rim to hub, that is, the gas-phase gathering degree increases. The maximum gas-phase volume distribution area is mainly concentrated in the area near the hub of the diffuser inlet and the middle blade height area at the outlet of the diffuser. The flow in the impeller is relatively stable under the different GVFs, while there is a large vortex near the inlet of the diffuser near the hub, and there is a backflow phenomenon between the outlet of the diffuser and the tip clearance of the impeller. The volume fraction of the gas phase near the rim fluctuates more than that near the hub because the gas phase is squeezed by the liquid phase more violently. The research results can provide theoretical guidance for the optimal design of oil-gas multiphase pump blades.

Sign in / Sign up

Export Citation Format

Share Document