Simulation study on near-field structure and flow characteristics of high-pressure CO2 released from the pipeline

Wang, Xiaohao; Song, Zeyang; Pan, Xuhai; Zhang, Lijing; Zhu, Xueliang; Mei, Yu; Jiang, Juncheng

doi:10.1016/j.jlp.2021.104481

Cited by 10 publications

(7 citation statements)

References 22 publications

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“…The high‐pressure gas was ejected from the small orifice to form a cylindrical jet, which then diffused under the action of buoyancy. To predict turbulent jet, the divergence ratio of the cylindrical jet could be accurately predicted based on the Realizable k‐ε model in the Reynolds‐Averaged Naiver‐Stokes (RANS) equation 18,24,25 …”

Section: Methodsmentioning

confidence: 99%

“…To predict turbulent jet, the divergence ratio of the cylindrical jet could be accurately predicted based on the Realizable k-ε model in the Reynolds-Averaged Naiver-Stokes (RANS) equation. 18,24,25 The layout of the research object and generated meshes, a full-scale geometry model of the gas leakage and diffusion device, was shown in Figure 2.…”

Section: Numerical Simulationmentioning

confidence: 99%

“…Interestingly, the concentration decay rate for hydrogen jet from rectangular nozzles with aspect ratios greater than unity were significantly larger than for the jets from square nozzles. Wang et al 18 explored the flow characteristics of the underexpanded jet and the phase transition. They found that the vapor phase was distributed at the edge of the jet near the nozzle.…”

Section: Introductionmentioning

confidence: 99%

“…Interestingly, the concentration decay rate for hydrogen jet from rectangular nozzles with aspect ratios greater than unity were significantly larger than for the jets from square nozzles. Wang et al 18 There were few researches on the release of multi-component gases similar to syngas under high-pressure and high-temperature conditions. In addition, there was a lack of sufficient understanding of the diffusion features of the whole process of syngas release under highpressure and high-temperature conditions.…”

mentioning

confidence: 99%

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Experimental and computational studies of concentration and flow field variation of syngas released

Li,

Wang,

Yin

et al. 2023

Env Prog and Sustain Energy

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Syngas is an important chemical energy source with broad application prospects. The main problem with using syngas is its hazards, such as high storage pressure, high dispersion, low mass density, explosive, and toxic. The aim of this article is to find the key factors for the diffusion of syngas leakage and analyze the distribution of the dangerous concentration range from the diffusion behavior and hazard range characteristics of syngas leakage under complex working conditions. Therefore, a syngas leakage experimental bench is established, and a three‐dimensional simulation of syngas leakage was modeled. The results show that the initial pressure is the most critical factor, and the concentration distribution under different initial pressures is significantly different. The time required for carbon monoxide (CO) and hydrogen (H2) to reach their maximum concentration increased as the initial pressure or temperature decreased. The volume ratio had little effect on the time when CO and H2 reached the maximum concentration. In the horizontal direction, CO diffused further than H2 in the buoyant jet. The max volume fraction of H2 and CO did not exceed 1% and 2.5%, respectively. The research results are expected to give guidelines for the safety protection and standard improvement of syngas leakage.

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Section: Methodsmentioning

confidence: 99%

Section: Numerical Simulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Interestingly, the concentration decay rate for hydrogen jet from rectangular nozzles with aspect ratios greater than unity were significantly larger than for the jets from square nozzles. Wang et al 18 There were few researches on the release of multi-component gases similar to syngas under high-pressure and high-temperature conditions. In addition, there was a lack of sufficient understanding of the diffusion features of the whole process of syngas release under highpressure and high-temperature conditions.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Experimental and computational studies of concentration and flow field variation of syngas released

Li,

Wang,

Yin

et al. 2023

Env Prog and Sustain Energy

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show abstract

“… 29 For instance, Zhang et al 24 have established a numerical model to investigate the dynamic oscillation characteristics of SC-CO 2 by using a standard k– ε turbulence model. Wang et al 30 used the Peng–Robinson EOS to compute the thermodynamic properties and the structure of the under-expanded jet of CO 2 . The SST k– ω turbulence model was used in the research.…”

Section: Introductionmentioning

confidence: 99%

Simulation Investigation on the Structure and Its Influence on the Impinging Pressure of the Carbon Dioxide Jet

Liu

2023

ACS Omega

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An improved understanding of the mechanisms of SC-CO2 jet drilling technology is important for the application of this new technology. The flow field structure and dynamic fluctuation of SC-CO2 jets are the key factors affecting the jet erosion performance. To improve the erosion performance of the SC-CO2 jet, it is necessary to study the relationship between the different flow fields of the jet. In this study, a numerical simulation model for SC-CO2 jet drilling technology is established. Based on the modified real-gas model, the pressure distribution and flow field characteristics of the SC-CO2 jet were obtained by the simulation investigation, and the reliability of the model was verified. The results show that the flow field structure of a supercritical CO2 jet has typical compressible flow field characteristics. As the jet is fully expanded, its pressure fluctuation is slight and less affected by the distance between the nozzle and the wall. When the jet is in the state of under-expansion, the flow field structure characteristics have a significant impact on the pressure distribution and peak pressure. At the same time, when the distance is large, when nozzle pressure ratio = 5, the pressure ratio has a more significant impact on the flow field and the pressure peak and distribution. The pressure distribution of different flow fields should be fully considered in the application.

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Experimental investigation of jet impingement during accidental release of liquid CO2

Liu

Wen

et al. 2023

Energy

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Simulation study on near-field structure and flow characteristics of high-pressure CO2 released from the pipeline

Cited by 10 publications

References 22 publications

Experimental and computational studies of concentration and flow field variation of syngas released

Experimental and computational studies of concentration and flow field variation of syngas released

Simulation Investigation on the Structure and Its Influence on the Impinging Pressure of the Carbon Dioxide Jet

Experimental investigation of jet impingement during accidental release of liquid CO2

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