scholarly journals Numerical Simulation of New Axial Flow Gas-Liquid Separator

Processes ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 64
Author(s):  
Jie Kou ◽  
Zhaoyang Li
Keyword(s):  
Numerical Simulation ◽  
Guide Vane ◽  
Concentration Field ◽  
Tangential Velocity ◽  
Axial Flow ◽  
Liquid Separation ◽  
Water Separation ◽  
Left Wall ◽  
The Right ◽  
Liquid Separator

At present, most of the incoming liquids from the oilfield combined stations are not pre-separated for natural gas, which makes the subsequent process of oil-water separation less effective. Therefore, it is necessary to carry out gas-liquid separation. A new type of axial flow gas-liquid separator was proposed in this paper. The numerical simulation was carried out by CFD FLUENT software, and the changes of concentration field, velocity field and pressure field in the axial flow gas-liquid separator were analyzed. It was found that there were gas-liquid separation developments and stabilization segments in the inner cylinder of the separator. The axial velocity will form a zero-speed envelope in the inner cylinder, and the direction of the velocity in front of and behind the zero-speed envelope was opposite. The tangential velocity showed a “W” shape distribution in the radial position of the inner cylinder. The pressure on the left wall of the guide vane was higher than that on the right side. Therefore, the left wall was more likely to be damaged than the right wall.

Supercritical Carbon Dioxide Centripetal Compressor—Aerodynamic Design and Analysis of Off Design Conditions

2019 ◽  
Vol 5 (4) ◽  
Author(s):  
Xuefei Du ◽  
Dengtao Yu ◽  
Dan Luo ◽  
Diangui Huang
Keyword(s):  
Carbon Dioxide ◽  
Numerical Simulation ◽  
Supercritical Carbon Dioxide ◽  
Guide Vane ◽  
Pressure Ratio ◽  
Axial Flow ◽  
Thermal Design ◽  
Test Method ◽  
Characteristic Line ◽  
Supercritical Carbon

Abstract Based on the design of the supercritical carbon dioxide (SCO2) centripetal compressor, this paper adopts the orthogonal design test method to optimize the pear-shaped volute, designs the front guide vane with the third-order Bezier curve, and designs the outlet by the equal section method. The numerical simulation calculation and analysis of the design conditions and variable conditions of the SCO2 centripetal compressor are carried out. The results at design conditions show that the isentropic efficiency is 92%, the pressure ratio is 1.21, and the mass flow rate is 195.9 kg/s, which is close to the thermal design and level simulation results; the results of variable conditions show that the efficiency of the SCO2 centripetal compressor-flow and pressure ratio-flow characteristic line is similar to that of multistage axial flow compressor. The supercritical carbon dioxide centripetal compressor designed in this paper meets the design requirements, and its feasibility is proved through numerical simulation.

Performance Research on the Axial Flow Fan Adding Guide Vane

2011 ◽  
Vol 228-229 ◽  
pp. 204-208
Author(s):  
Wang Rui ◽  
Yi Chun Wang ◽  
Hong Fei Zheng ◽  
Chao Qing Feng
Keyword(s):  
Numerical Simulation ◽  
Mass Flow ◽  
Cooling System ◽  
Guide Vane ◽  
Axial Flow ◽  
Experiment Research ◽  
Axial Flow Fan ◽  
Result Show ◽  
Performance Research ◽  
Better Than

Fan is a major part of the cooling system in the vehicle, axial flow fan is used very common recently. In order to improve the cooling capability, cooling fan’s structure has been changed; experiment research and numerical simulation are done for it. The result show that after adding guide vane to axial flow fan, its mass flow increases. At the same speed, the mass flow is increased by 20% when a rear guide vane is installed, and 15% of mass flow increase when the front guide vane is installed, which indicates that a mixed flow fan could be increased in flow and improved in performance if the guide vanes are installed. Rear guide vane is better than front guide vane in the aspect of improving mass flow. Take front guide vane as an example, adopting the NUMECA for numerical simulation, the result is as similar as the experiment’s.

Effects of roughness on the performance of axial flow cyclone separators using numerical simulation method

2019 ◽  
Vol 233 (7) ◽  
pp. 914-927
Author(s):  
Li Jun ◽  
Chunyuan Ma ◽  
Wang Tao ◽  
Jingcai Chang ◽  
Xiqiang Zhao
Keyword(s):  
Numerical Simulation ◽  
High Efficiency ◽  
Separation Efficiency ◽  
Tangential Velocity ◽  
Axial Flow ◽  
Simulation Method ◽  
Roughness Height ◽  
Wall Roughness ◽  
Numerical Simulation Method ◽  
Axial Flow Cyclone

An axial flow cyclone is a separator with high efficiency and low resistance. Researchers have extensively studied the structure and parameters that have the greatest influence on its performance. However, the influence of wall roughness on the performance of axial flow cyclones has been neglected for a long time. The wall roughness height can be changed by the manufacturing process and the effect of particles on the wall. Thus, in this study, the effects of roughness on an axial flow cyclone are investigated using a numerical simulation method. The Reynolds stress model and discrete phase model are used for gas and particle prediction and the simulation result were verified through experimentation. The results of the numerical simulation show that the roughness height has big influence on axial flow cyclones. The separation efficiency decreases and static pressure drop increases with increasing roughness height. This happens especially at high inlet velocity. The tangential velocity decreases, particularly near the inner surface of the cyclone, and axial velocity increases in the center of the pipe. The trends show that the degree of change reduced for all parameters with increasing roughness height.

scholarly journals Separation Characteristics of an Axial Hydrocyclone Separator

Processes ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 2288
Author(s):  
Jie Kou ◽  
Zhaoming Jiang ◽  
Yiying Cong
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Velocity Distribution ◽  
Pressure Distribution ◽  
Concentration Distribution ◽  
Guide Vane ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water ◽  
Tangential Inlet

An innovative axial hydrocyclone separator was designed in which a guide vane was installed to replace a conventional tangential inlet, potentially aggravating inlet turbulence. The characteristics of velocity distribution, concentration distribution, and pressure distribution inside the separator were obtained through the numerical simulation of the turbulent flow of oil and water. The results showed that the flow field presented good symmetry, which eliminated the eccentric turbulence phenomenon in the conventional hydrocyclone separators and was beneficial for the oil–water separation.

A Method to Design and Optimize Axial Flow Cyclones for Gas-Liquid Separation

2021 ◽  
Author(s):  
Kyle Anderson ◽  
Xiang Zhang ◽  
Bahman Abbasi
Keyword(s):  
Performance Optimization ◽  
Collection Efficiency ◽  
Axial Flow ◽  
Design Parameters ◽  
Liquid Separation ◽  
Water Separation ◽  
Air Mass ◽  
Water Collection ◽  
Mass Flowrate ◽  
And Performance

Abstract This paper provides a detailed design guide, optimization, and performance assessment for air-water separation of an axial flow cyclone. Axial flow cyclones (also known as swirl tube demisters, mist eliminators, or Austin-Write cyclones) have a range of applications in several different industries. This method of gas-liquid separation offers many benefits. Among these are high separation efficiency in high pressure applications (over 90% at 1 MPa) and an inline design that allows them to be more easily fitted into existing piping structures. Despite these benefits, there is a lack of recent literature on their design criteria and performance optimization. This research fills the gap in the literature by quantifying the effect of design parameters on water collection efficiency, ?_(water collection), and the air bypass efficiency, ?_(air bypass), defined as the ratio of the air mass flowrate exiting through the desired air outlet over the inlet air mass flowrate. A set of wide-ranging experiments were conducted to study the effects of gas-liquid flow rates, tube geometry, and relative injection angles to optimize water collection and air bypass efficiencies. The water collection efficiency exceeded 99.8% when the liquid streamline came in direct contact with the water drainage exit. An empirical correlation was developed to predict the swirl pitch as a function of the above design parameters. Predictions from the correlation were within 10% of the experimental results. The correlation can be used to design highly efficient in-line gas-liquid separators.

Ciliary Flow of Casson Nanofluid with the Influence of MHD having Carbon Nanotubes

2020 ◽  
Vol 16 ◽  
Author(s):  
Adel Alblawi ◽  
Saba Keyani ◽  
S. Nadeem ◽  
Alibek Issakhov ◽  
Ibrahim M. Alarifi
Keyword(s):  
Carbon Nanotubes ◽  
Velocity Profile ◽  
Pressure Gradient ◽  
Volume Fraction ◽  
Solid Volume Fraction ◽  
Pressure Rise ◽  
Shear Stresses ◽  
Left Wall ◽  
Coupled Equations ◽  
The Right

Objective: In this paper, we consider a model that describes the ciliary beating in the form of metachronal waves along with the effects of Magnetohydrodynamic fluid over a curved channel with slip effects. This work aims at evaluating the effect of Magnetohydrodynamic (MHD) on the steady two dimensional (2-D) mixed convection flow induced in carbon nanotubes. The work is done for both the single wall nanotube and multiple wall nanotube. The right wall and the left wall possess a metachronal wave that is travelling along the outer boundary of the channel. Methods: The wavelength is considered as very large for cilia induced MHD flow. The governing linear coupled equations are simplified by considering the approximations of long wavelength and small Reynolds number. Exact solutions are obtained for temperature and velocity profile. The analytical expressions for the pressure gradient and wall shear stresses are obtained. Term for pressure rise is obtained by applying Numerical integration method. Results: Numerical results of velocity profile are mentioned in a table form, for various values of solid volume fraction, curvature, Hartmann number [M] and Casson fluid parameter [ζ]. Final section of this paper is devoted to discussing the graphical results of temperature, pressure gradient, pressure rise, shear stresses and stream functions. Conclusion: Velocity profile near the right wall of the channel decreases when we add nanoparticles into our base fluid, whereas an opposite behaviour is depicted near the left wall due to ciliated tips whereas the temperature is an increasing function of B and ߛ and decreasing function of ߶.

Influence of Leading Edge Fillet and Nonaxisymmetric Contoured Endwall on Turbine NGV Exit Flow Structure and Interactions With the Rim Seal Flow

2013 ◽  
Author(s):  
Özhan H. Turgut ◽  
Cengiz Camcı
Keyword(s):  
Flow Structure ◽  
Total Pressure ◽  
Guide Vane ◽  
Axial Flow ◽  
Leading Edge ◽  
Turbine Rotor ◽  
Rotor Blades ◽  
Constant Thickness ◽  
Computational Evaluation ◽  
Nozzle Guide

Three different ways are employed in the present paper to reduce the secondary flow related total pressure loss. These are nonaxisymmetric endwall contouring, leading edge (LE) fillet, and the combination of these two approaches. Experimental investigation and computational simulations are applied for the performance assessments. The experiments are carried out in the Axial Flow Turbine Research Facility (AFTRF) having a diameter of 91.66cm. The NGV exit flow structure was examined under the influence of a 29 bladed high pressure turbine rotor assembly operating at 1300 rpm. For the experimental measurement comparison, a reference Flat Insert endwall is installed in the nozzle guide vane (NGV) passage. It has a constant thickness with a cylindrical surface and is manufactured by a stereolithography (SLA) method. Four different LE fillets are designed, and they are attached to both cylindrical Flat Insert and the contoured endwall. Total pressure measurements are taken at rotor inlet plane with Kiel probe. The probe traversing is completed with one vane pitch and from 8% to 38% span. For one of the designs, area averaged loss is reduced by 15.06%. The simulation estimated this reduction as 7.11%. Computational evaluation is performed with the rotating domain and the rim seal flow between the NGV and the rotor blades. The most effective design reduced the mass averaged loss by 1.28% over the whole passage at the NGV exit.

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