Numerical optimization on the geometrical factors of natural gas ejectors

Chen, Weixiong; Chong, Daotong; Yan, Junjie; Liu, Jiping

doi:10.1016/j.ijthermalsci.2011.02.026

Cited by 40 publications

(15 citation statements)

References 16 publications

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“…The main geometry parameters of natural gas ejector listed in Table 2 were designed according to the results of research [11].…”

Section: Resultsmentioning

confidence: 99%

“…Melancon and Nunn [8] and Andreussi et al [9] also investigated its operation mechanism experimentally. Recently, Chong et al [10] and Chen et al [11] investigated the geometrical parameters of the ejector to obtain the optimum operation through different methods. Chong et al [10] carried out research on structural parameters to get the maximum pressure ratio, and Chen et al [11] studied optimal geometrical factors to obtain the maximum entrainment ratio.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Investigation of Two-Phase Flow in Natural Gas Ejector

Chen

Chong

Yan

et al. 2013

Heat Transfer Engineering

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Increasing production and recovery from the mature oil and gas fields often requires a boosting system when the gas pressure is lower than that demanded by the transportation or process system. The supersonic ejector, considered to be a cost-effective way to boost the production of a low-pressure gas well, was introduced into the industrial field. However, the exploitation of natural gas often accompanies with water. The computational fluid dynamics (CFD) technique was employed to investigate the two-phase effect (water droplets) on the performance of natural gas ejector for the motive pressure ranging from 11.0 MPa to 13.0 MPa, induced pressure from 3.0 MPa to 5.0 MPa, and backpressure from 5.1 MPa to 5.6 MPa, while the injected water flow rate was less than 0.03 kg s −1 . The numerical results show that the entrainment ratio of the two-phase operation was higher than that of the single-phase operation with the variation of backpressure. Meanwhile, the entrainment ratio increased with the increase of injected water flow rate into the primary flow. When the water was injected into the secondary flow, the entrainment ratio decreased as the injected water flow rate increased, but the critical backpressure remained unchanged.

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“…The main geometry parameters of natural gas ejector listed in Table 2 were designed according to the results of research [11].…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Two-Phase Flow in Natural Gas Ejector

Chen

Chong

Yan

et al. 2013

Heat Transfer Engineering

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“…The turbulence model k--RNG is such a model which can accurately handle both the higher and lower Reynolds number (ANSYS FLUENT User's Guide, 2010). Also, in the previous studies this model was chosen and were used effectively (Chen et al 2011;Zhu et al 2009;Bartosiewicz et al 2005). This model relies on the Boussinesq hypothesis.…”

Section: Numerical Simulationmentioning

confidence: 99%

“…Moving the primary nozzle towards the mixing chamber decreases the entrainment ratio, but increases the critical back pressure (Eames et al 2007;Pianthong et al 2007;Aphornratana et al 1997;Rusly et al 2005;Chen et al 2011). However, this prediction may not be true in all cases (Huang et al 1999).…”

Section: Introductionmentioning

confidence: 97%

Analytical and Numerical Studies of a Steam Ejector on the Effect of Nozzle Exit Position and Suction Chamber Angle to Fluid Flow and System Performance

Ramesh¹,

Sekhar²

2017

JAFM

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Nozzle exit position [NXP] plays a vital role in the performance of the ejector, but its values are specified in a range for the required operating condition. In this study instead of the range of values, a specific value, named as entrainment diameter is developed and its effect on the performance of the ejector is studied for several combinations of suction chamber angle using numerical method. The effect of the condenser and boiler pressures on the performance of the ejector are also studied to ensure the off-design operating conditions. The entrainment diameter of an ejector is derived analytically by solving one dimensional compressible fluid flow equations using MATLAB. To study the effect of entrainment diameter on the performance of the ejector, CFD technique is employed. Analytical and numerical results are validated with experimental data available in the previous studies. For 7 kW refrigeration capacity, it is inferred that the suction chamber angle of 18° and the corresponding entrainment diameter 90.8 mm with the NXP of 23.62 mm yield the maximum entrainment ratio. The study predicts that the performance of the ejector is highly influenced by the pressure increment at the exit of the nozzle, while the suction chamber angle is between 12° to 21°.

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“…Pounds et al [12] and some other investigators [13][14][15] studied the influence of nozzle position on entrainment performance, and found an optimal nozzle position could produce a maximal coefficient of performance. Pianthong et al [16] and some investigators [17][18][19] studied the effects of mixing chamber length, suction chamber angle and diffuser chamber length on entrainment performance. In addition, Chunnanond and Aphornratana [20], Yan et al [21] and Chong et al [22] investigated the static pressure along the ejector axis at different operating conditions.…”

Section: Introductionmentioning

confidence: 99%