풍동실험을 통한 배과원 방충망의 풍하중 및 항력계수 평가
Evaluation of Wind Load and Drag Coefficient of Insect Net in a Pear Orchard using Wind Tunnel Test
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초록
Fruit bagging is a traditional way to produce high-quality fruit and to prevent damage from insects and diseases. Growing pears by non-bagging isconcerned about the damage from insect, it can be controlled by installing a insect net facility. Wind load should be considered to design the insectnet facility because it has the risk of collapse due to the strong wind. So we carried out wind tunnel test for measurement of drag force, where theinsect net with porosity about 65% is selected as an experimental subject. As a result of the test, drag force was measured to be 244.14 N when insectnet area and wind speed are 1 ㎡ and 22.7 m/s respectively. And, drag coefficients for the insect net were found to be about 0.55∼0.57, which maybe used as the preliminary data to design the insect net facilities at the orchard.
Abstract
Fruit bagging is a traditional way to produce high-quality fruit and to prevent damage from insects and diseases. Growing pears by non-bagging isconcerned about the damage from insect, it can be controlled by installing a insect net facility. Wind load should be considered to design the insectnet facility because it has the risk of collapse due to the strong wind. So we carried out wind tunnel test for measurement of drag force, where theinsect net with porosity about 65% is selected as an experimental subject. As a result of the test, drag force was measured to be 244.14 N when insectnet area and wind speed are 1 ㎡ and 22.7 m/s respectively. And, drag coefficients for the insect net were found to be about 0.55∼0.57, which maybe used as the preliminary data to design the insect net facilities at the orchard.
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