Simulation of construction ventilation in deep diversion tunnels using Euler–Lagrange method

Liu, Zhen; Wang, Xiaoling; Cheng, Zhi; Sun, Ren; Zhang, Aili

doi:10.1016/j.compfluid.2014.09.016

Cited by 32 publications

(13 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…L represents the distance between the monitoring points and the working face. Figure 5 shows the difference between the simulated and measured air velocity values and those published by Liu et al (2014). Except for point P 1 , the simulated values are very close to the measured values and even closer than those of Liu et al (2014).…”

Section: Model Validationsupporting

confidence: 54%

“…Model validation was based on previously published literature (Liu, Wang, Cheng, Sun, & Zhang, 2014). A 500-m-long tunnel consistent with the Jinping Secondcascade Hydropower Station deep diversion system was built.…”

Section: Model Validationmentioning

confidence: 99%

“…A 500-m-long tunnel consistent with the Jinping Secondcascade Hydropower Station deep diversion system was built. Liu et al, 2014 analyzed the air flow distribution and dust particles movement. The article includes very detailed field measurements.…”

Section: Model Validationmentioning

confidence: 99%

“…Saha, Zhang, and Ni (2010) simulated ammonia mass transfer to investigate the airflow characteristics in tunnels, finding that higher air velocity does not significantly affect ammonia distributions but can reduce ammonia concentration at the tunnel outlet. Liu, Wang, Cheng, Sun, and Zhang (2014) used a 3D unsteady Euler-Lagrange two-phase turbulence model to study the pollutant discharge problem. Additionally, Wang, Zhang, Zhou, and Chen (2011) used a 3D renormalization kmodel to study long diversion tunnels with forced ventilation, considering the effects of air leakage and frictional resistance.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Comparison of ventilation methods used during tunnel construction

Chang

Jaturapitakkul

Liu

et al. 2019

Engineering Applications of Computational Fluid Mechanics

View full text Add to dashboard Cite

Ensuring adequate ventilation during tunnel construction is a critical issue that directly affects construction efficiency. A good ventilation environment can effectively guarantee the construction progress. In this paper, by repeatedly selecting the flow field simulation parameters and continuously summarizing the calculation methods, a reasonable model is selected to simulate the tunnel engineering. Specifically, the eddy current zone near the working face is obtained by analysing the flow field of forced ventilation tunnels. Furthermore, we analyse the dispersion and accumulation of harmful gases in the tunnel. The CO concentration at typical locations in the tunnel is also examined in order to determine areas with the lowest likelihood of harmful gas discharge. We then propose adding a jet fan to the tunnel to create an extraction plus ventilation tunnel. Simulation results reveal that the addition of a jet fan causes eddy currents that improve the extraction of harmful gases, thereby greatly reducing ventilation time and increasing efficiency. The results of the model can effectively guide the actual project, and help them save the construction time.

show abstract

Section: Model Validationsupporting

confidence: 54%

Section: Model Validationmentioning

confidence: 99%

Section: Model Validationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Comparison of ventilation methods used during tunnel construction

Chang

Jaturapitakkul

Liu

et al. 2019

Engineering Applications of Computational Fluid Mechanics

View full text Add to dashboard Cite

show abstract

“…With the rapid development of computational fluid dynamics (CFD) and computing technology, the CFD technique is used to simulate the ventilation of underground engineering during the construction period [10][11][12][13]. The air flow organization and the change characteristics of harmful gas in the underground cavern group are studied to solve the ventilation problems in the construction process and to optimize the ventilation scheme.…”

Section: Introductionmentioning

confidence: 99%

Optimization Scheme for Construction Ventilation in Large-Scale Underground Oil Storage Caverns

et al. 2018

View full text Add to dashboard Cite

The ventilation effect has a direct influence on the efficiency and security of the construction of an underground cavern group. Traditional forced ventilation schemes may be ineffective and result in resource wastage. Based on the construction ventilation of the Jinzhou underground oil storage project, an axial flow gallery ventilation mode using shafts as the fresh air inlet was proposed. A 3D steady RANS (Reynolds Averaged Navier-Stokes) approach with the RNG (Renormalization-group) k-ε turbulence model was used to study airflow behavior and hazardous gas dispersion when different ventilation schemes were employed. Field test values of the air velocity and CO concentration in the main cavern and construction roadway were also adopted to validate the RNG k-ε turbulence model. The results showed that the axial flow gallery ventilation mode can ensure that the direction of air flow is the same as that of heavy trucks, fresh air is always near the excavation face, and the disturbance of the construction process is greatly reduced. The scheme is suitable for large-scale caverns with a ventilation distance less than 2 km, and an intermediate construction shaft is not needed. When the ventilation distance exceeds 2 km, it is possible to use jet fans to assist the axial flow gallery ventilation mode or to completely adopt jet-flow gallery ventilation.

show abstract