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풍동실험을 통한 방풍용 서양측백나무와 농업용방풍망의 공기역학계수 평가
이소진 ( Lee¸ Sojin ),하태환 ( Ha¸ Taehwan ),서시영 ( Seo¸ Siyoung ),송호성 ( Song¸ Hosung ),우샘이 ( Woo¸ Saemee ),장유나 ( Jang¸ Yuna ),정민웅 ( Jung¸ Minwoong ),조광곤 ( Jo¸ Gwanggon ),한덕우 ( Han¸ Dukwoo ),황옥화 ( Hwang¸ Okh 한국농공학회 2021 한국농공학회논문집 Vol.63 No.5
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, C<sub>1</sub>, C<sub>2</sub>, 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.