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Numerical Simulation of Ventilation Performance for Large-scale Underground Cavern Group Considering Effect of Ventilation Shaft Structure

  • Research Article-Civil Engineering
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Abstract

Construction ventilation runs through the entire construction process of large underground caverns and is the key to ensuring construction progress and project safety. For the specific underground cavern group of pumped-storage power plants, a three-dimensional model is constructed, and the CFD method based on fluid mechanics theory is used to simulate the ventilation flow field of the underground cavern group. Through the comparison of the airflow in the main caverns and the air velocity distribution law, Quantitative analysis of the influence of the diameter of the ventilation shaft and the inclination of the shaft on the ventilation flow field shows that when the diameter of the ventilation shaft is 8 m and the inclination of the shaft is 80°, the ventilation effect in the underground cavern group is the best. Applying this scheme to engineering practice and conducting on-site tests, the average relative error of the measuring points is 11.32% by comparing the measured data and the simulation results, which verifies the correctness of the CFD method used. It provides reference value for studying the construction ventilation of underground caverns.

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Acknowledgements

The study was supported by the National Natural Science Foundation of China (No. 51905550), the Science and Technology Major Project of Changsha, China (No. kq1703022) and the independent exploration and innovation project of Central South University (No. 2020zzts100).

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Authors and Affiliations

  1. College of Mechanical and Electrical Engineering, Central South University, Changsha, 410083, China

    Yimin Xia, Xuemeng Xiao & Laikuang Lin

  2. State Key Laboratory of High Performance Complex Manufacturing, College of Mechanical and Electrical Engineering, Central South University, Changsha, 410083, China

    Yimin Xia, Xuemeng Xiao & Laikuang Lin

  3. China Railway 14Th Bureau Group, Shield Engineering Co., LTD, Nanjing, 211899, China

    Yazhou Zhang

  4. School of Civil Engineering, Central South University, Changsha, 410083, China

    Shuying Wang

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  1. Yimin Xia
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  2. Xuemeng Xiao
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  5. Laikuang Lin
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Correspondence to Xuemeng Xiao.

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Xia, Y., Xiao, X., Zhang, Y. et al. Numerical Simulation of Ventilation Performance for Large-scale Underground Cavern Group Considering Effect of Ventilation Shaft Structure. Arab J Sci Eng 47, 4093–4104 (2022). https://doi.org/10.1007/s13369-021-05914-y

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  • DOI: https://doi.org/10.1007/s13369-021-05914-y

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