Optimal Selection of Supersonic Separators Inlet Velocity Components via Maximization of Swirl Strength and Centrifugal Acceleration

Vaziri, Behrooz Mahmoodzadeh; Shahsavand, Akbar

doi:10.1080/01496395.2014.958782

Cited by 29 publications

(12 citation statements)

References 12 publications

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“…The larger the centrifugal acceleration is, the more easily the droplets are thrown to the wall, and the higher the separation efficiency is. [28].…”

Section: Introductionmentioning

confidence: 99%

Study on Supersonic Dehydration Efficiency of High Pressure Natural Gas

Duan

Guo

et al. 2020

Sustainability

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Supersonic cyclone separator is a novel type of natural gas dewatering device that overcomes the shortcomings of traditional dewatering methods. In order to investigate the factors affecting the separation efficiency and improve the separation performance of the supersonic cyclone separator, the discrete particle model was employed in numerical calculation. On the basis of an accurate numerical model, the flow field of supersonic cyclone separator was analyzed, the trajectories of droplets were predicted, and the factors affecting the separation efficiency of droplets were investigated. The numerical results indicated that Laval nozzle could provide the necessary conditions for the condensation of water vapor. The swirler can throw droplets onto the wall or into the separator, both of which are foundations for realizing the separation of droplets. Droplets had three typical trajectories affected by centrifugal effect and inertia effect. The existence of a shock wave increases the swirl intensity of droplets, which is conducive to the separation of droplets. The diameter of droplets should be increased as much as possible in order to improve separation efficiency, and the gas–liquid area ratio should be about 45.25%, and the number of vanes should be 10.

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“…The larger the centrifugal acceleration is, the more easily the droplets are thrown to the wall, and the higher the separation efficiency is. [28].…”

Section: Introductionmentioning

confidence: 99%

Study on Supersonic Dehydration Efficiency of High Pressure Natural Gas

Duan

Guo

et al. 2020

Sustainability

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“…The supersonic nozzle separation is one of the recent alternatives in natural gas dehydration units for saving cost and energy. Ma et al, Wen et al, Castier, Vaziri and Shahsavand, and Cao and Yang used air–water mixture instead of natural gas for experimental analysis of multiphase supersonic separators …”

Section: Introductionmentioning

confidence: 99%

“…Ma et al, 13 Wen et al, 14 Castier, 15 Vaziri and Shahsavand, 16 and Cao and Yang 17 used airwater mixture instead of natural gas for experimental analysis of multiphase supersonic separators. [13][14][15][16][17] The aim of the present research is to highlight the effect of fluid type and to assess the influence of using different gases on the hydrodynamic behavior of the nozzle on the basis of experimental findings of Sajben et al on a Laval nozzle. In addition, an analysis of pressure order is performed to find out whether the alteration of working pressure affects the behavior of the nozzle.…”

mentioning

confidence: 99%

Effects of fluid type and pressure order on performance of convergent–divergent nozzles: An efficiency model for supersonic separation

Niknam

Mortaheb

Mokhtarani

2018

Asia-Pacific J Chem Eng

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A deep analysis on the hydrodynamics of convergent–divergent nozzles is performed by changing the working conditions and fluid type. The nozzle geometry lowers the temperature of the flowing fluid, which contributes to condensation and phase change. The focus of this paper is to evaluate the nozzle performance and cooling capacity in terms of temperature, pressure, and gas type in a fixed geometry of Sajben Laval nozzle. The analysis has been conducted via a 2‐dimensional turbulent computational fluid dynamics simulation for illustrating the behavior of the fluid. A criterion for the nozzle performance is provided by prediction of exact shock wave position. An investigation on 6 different gas types demonstrates that heat capacity and thermal conductivity are the most rolling fluid properties of the nozzle performance. Furthermore, it is found that the shock wave position is unchanged during alteration of fluid type or pressure scale. A new model is provided for prediction of convergent–divergent nozzle performance in the supersonic conditions for dehydration of natural gas as a well‐known industrial application of the nozzles. The model is developed by the genetic algorithm as a multivariable optimization method.

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“…Yang et al [13,14] performed detailed CFD simulations to study the pressure recovery characteristics and real gas effects based on a single gas flow without considering swirl. Vaziri & Shahsavand [15] optimized the axial, radial and circumferential components of the inlet velocity by evaluating the swirl strength and centrifugal acceleration with the assumption of a single gas flow in a supersonic separator. The results showed that the increasing pressure and temperature decreased the swirl number and centrifugal acceleration.…”

Section: Introductionmentioning

confidence: 99%

Effect of swirling device on flow behavior in a supersonic separator for natural gas dehydration

Wen

Walther

et al. 2016

Separation and Purification Technology

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The supersonic separator is a revolutionary device to remove the condensable components from gas mixtures. One of the key issues for this novel technology is the complex supersonic swirling flow that is not well understood. A swirling device composed of an ellipsoid and several helical blades is designed for an annular supersonic separator. The supersonic swirling separation flow of natural gas is calculated using the Reynolds Stress model. The results show that the viscous heating and strong swirling flow cause the adverse pressure in the annular channel, which negatively affects the separation performance. When the swirling flow passes through the annular nozzle, it will damage the expansion characteristics of the annular nozzle. The blade angles and numbers are both optimized by evaluating the swirling and expansion effects for the supersonic separation.

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Optimal Selection of Supersonic Separators Inlet Velocity Components via Maximization of Swirl Strength and Centrifugal Acceleration

Cited by 29 publications

References 12 publications

Study on Supersonic Dehydration Efficiency of High Pressure Natural Gas

Study on Supersonic Dehydration Efficiency of High Pressure Natural Gas

Effects of fluid type and pressure order on performance of convergent–divergent nozzles: An efficiency model for supersonic separation

Effect of swirling device on flow behavior in a supersonic separator for natural gas dehydration

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