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한국생물환경조절학회 / v.5, no.2, 1996년, pp.152-159 
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인공광하에서 공정묘 개체군상의 공기역학적 저항 및 확산계수
( Aerodynamic Resistance and Eddy Diffusivity above the Plug Stand under Artificial Light ) |
| 김용현;고재풍수; 전북대학교 농과대학 농업기계공학과;천엽대학 원예학부 생물생산과학과 환경조절공학연구소;
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| 초 록 |
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| Experiment was performed in a newly developed wind tunnel with light system to determine the aerodynamic resistance and eddy diffusivity above the plug stand under artificial light. Maximum air temperature appeared near the top of the plug stand under artificial light. Since Richardson number was ranged from -0.07 to +0.01, the atmosphere above the plug stand in wind tunnel was in an unstable or near- neutral stability state. The average aerodynamic resistance at rear region of plug stand was 25 % higher than that at middle region. Eddy diffusivity($K_{M}$) linearly increased with the increasing air current speed. $K_{M}$ at air current speed of 0.9 m.$s^{-1}$ was about two times as many as that at air current speed of 0.3 m.$s^{-1}$. And average $K_{M}$ at the rear region was 15% lower than that at the middle region. These results indicated that the diffusion of heat and mass along the direction of air current inside the plug stand was different. It might cause the lack of uniformity in the growth and quality of plug seedlings. The wind tunnel developed in this study would be useful to investigate the effects of air current speed on microclimates and the growth of plug seedlings under artificial light in a semi- closed ecosystem. |
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| 키워드 |
| $ extrm{CO}_2$확산;공정묘 개체군;공기역학적 저항;확산계수;인공광;안정성;$ extrm{CO}_2$ diffusion;plug stand;aerodynamic resistance;eddy diffusivity;artificial light;stability; |
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생물환경조절학회지 / v.5, no.2, 1996년, pp.152-159
한국생물환경조절학회
ISSN : 1229-4675
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199611922405016)
언어 : 한국어 |
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| 논문 제공 : KISTI 한국과학기술정보연구원 |
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