Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
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Wind Tunnel Evaluation of Aerodynamic Coefficients of Thuja occidentalis and Mesh Net

풍동실험을 통한 방풍용 서양측백나무와 농업용방풍망의 공기역학계수 평가

  • Lee, Sojin (Division of Animal Environment, National Institute of Animal Science (NIAS)) ;
  • Ha, Taehwan (Division of Animal Environment, National Institute of Animal Science (NIAS)) ;
  • Seo, Siyoung (Division of Animal Environment, National Institute of Animal Science (NIAS)) ;
  • Song, Hosung (Division of Disaster Prevention Engineering, National Institute of Agricultural Sciences (NAS)) ;
  • Woo, Saemee (Division of Animal Environment, National Institute of Animal Science (NIAS)) ;
  • Jang, Yuna (Division of Animal Environment, National Institute of Animal Science (NIAS)) ;
  • Jung, Minwoong (Division of Animal Environment, National Institute of Animal Science (NIAS)) ;
  • Jo, Gwanggon (Division of Animal Environment, National Institute of Animal Science (NIAS)) ;
  • Han, Dukwoo (Division of Animal Environment, National Institute of Animal Science (NIAS)) ;
  • Hwang, Okhwa (Division of Animal Environment, National Institute of Animal Science (NIAS))
  • Received : 2020.08.21
  • Accepted : 2021.09.15
  • Published : 2021.09.30
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Abstract

Windbreak forests, which have a windproof effect against strong winds, are known to be effective in reducing the spread of odors and dust emitted from livestock farms. The effect of reducing the spread of odors and dust can be estimated through numerical models such as computational fluid dynamics, which require aerodynamic coefficients of the windbreaks for accurate prediction of their performance. In this study, we aimed to evaluate the aerodynamic coefficients, Co, C1, C2, and α, of two windbreaks, Thuja occidentalis and a mesh net, through wind tunnel experiments. The aerodynamic coefficients were derived by the relation between the incoming wind speed and the pressure loss due to the windbreaks which was measured by differential pressure sensors. In order to estimate the change in the aerodynamic coefficient concerning various leaf density, the experiments were conducted repeatedly by removing the leaves gradually in various stages. The results showed that the power law regression model more suitable for coefficient evaluation compared to the Darcy-Forchheimer model.

Keywords

Acknowledgement

본 연구는 2021년도 농촌진흥청 (국립축산과학원) 연구사업 (PJ014297042021) 및 전문연구원 과정 지원사업에 의해 이루어진 것임.

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