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Generation Mechanism and Prediction Model for Low Frequency Noise Induced by Energy Dissipating Submerged Jets during Flood Discharge from a High Dam

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  • Jijian Lian

    (State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, 92 Weijin Road, Nankai District, Tianjin 300072, China)

  • Wenjiao Zhang

    (State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, 92 Weijin Road, Nankai District, Tianjin 300072, China)

  • Qizhong Guo

    (Department of Civil and Environmental Engineering, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA)

  • Fang Liu

    (State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, 92 Weijin Road, Nankai District, Tianjin 300072, China)

Abstract

As flood water is discharged from a high dam, low frequency ( i.e ., lower than 10 Hz) noise (LFN) associated with air pulsation is generated and propagated in the surrounding areas, causing environmental problems such as vibrations of windows and doors and discomfort of residents and construction workers. To study the generation mechanisms and key influencing factors of LFN induced by energy dissipation through submerged jets at a high dam, detailed prototype observations and analyses of LFN are conducted. The discharge flow field is simulated using a gas-liquid turbulent flow model, and the vorticity fluctuation characteristics are then analyzed. The mathematical model for the LFN intensity is developed based on vortex sound theory and a turbulent flow model, verified by prototype observations. The model results reveal that the vorticity fluctuation in strong shear layers around the high-velocity submerged jets is highly correlated with the on-site LFN, and the strong shear layers are the main regions of acoustic source for the LFN. In addition, the predicted and observed magnitudes of LFN intensity agree quite well. This is the first time that the LFN intensity has been shown to be able to be predicted quantitatively.

Suggested Citation

  • Jijian Lian & Wenjiao Zhang & Qizhong Guo & Fang Liu, 2016. "Generation Mechanism and Prediction Model for Low Frequency Noise Induced by Energy Dissipating Submerged Jets during Flood Discharge from a High Dam," IJERPH, MDPI, vol. 13(6), pages 1-24, June.
    • Handle: RePEc:gam:jijerp:v:13:y:2016:i:6:p:594-:d:72053
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    References listed on IDEAS

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    1. Catherine Marquis-Favre & Julien Morel, 2015. "A Simulated Environment Experiment on Annoyance Due to Combined Road Traffic and Industrial Noises," IJERPH, MDPI, vol. 12(7), pages 1-21, July.
    2. Stéphane Perron & Céline Plante & Martina S. Ragettli & David J. Kaiser & Sophie Goudreau & Audrey Smargiassi, 2016. "Sleep Disturbance from Road Traffic, Railways, Airplanes and from Total Environmental Noise Levels in Montreal," IJERPH, MDPI, vol. 13(8), pages 1-21, August.
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    4. David O. Baloye. & Lobina G. Palamuleni, 2015. "A Comparative Land Use-Based Analysis of Noise Pollution Levels in Selected Urban Centers of Nigeria," IJERPH, MDPI, vol. 12(10), pages 1-22, September.
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    Cited by:

    1. Jijian Lian & Xiaoqun Wang & Wenjiao Zhang & Bin Ma & Dongming Liu, 2017. "Multi-Source Generation Mechanisms for Low Frequency Noise Induced by Flood Discharge and Energy Dissipation from a High Dam with a Ski-Jump Type Spillway," IJERPH, MDPI, vol. 14(12), pages 1-23, November.

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