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湿帘内侧导流板对鸡舍气流及温度影响的CFD模拟 被引量:3

CFD Simulation for Influence of Air Flow and Temperature in Hen House with Setting Flaps behind Cooling Pad
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摘要 湿帘内侧的保温盖板在夏季可起到导流板作用,缓解湿帘开启后温度骤降对蛋鸡生产的影响,但进风气流经过导流板后,速度和方向发生变化,影响舍内气流和温度分布。为探究导流板对舍内环境影响趋势,通过计算流体力学(Computational fluid dynamics,CFD)分别探究了不同湿帘进风口布置的导流板对舍内及笼内气流和温度及分布影响,鸡舍环境模拟模型通过现场试验验证。结果表明:导流板可增加进风口附近区域的气流速度,降低笼内温度,且变化幅度随着进风位置与头架鸡笼间距离的增加而降低,研究中靠近进风口区域(自头架笼起27 m内鸡笼区域)平均气流速度可增幅0.54 m/s,可增大温度降幅0.2℃;距头架鸡笼27 m以外的笼内区域影响不显著。说明导流板可改善夏季纵向通风鸡舍内部分区域气流速度偏低问题,提高通风效率。 Adding insulation cover behind cooling pad is widely adopted in practice. It can prevent cold air from entering hen house directly in winter.It acts as flaps to alleviate the impact of temperature drop on laying hen production in summer. However, the velocity and direction of inlet airflow changes after passing through the flap, which affects the distribution and values of airflow and temperature in hen house. In this study, computational fluid dynamics(CFD)was used to investigate the effect of flaps on airflow and temperature in caged-hen occupied zone(CZ) under varied air supply locations. The simulation model was validated by field experiment. The results showed that flaps could increase airflow speed as well as decrease temperature in CZ near inlet, and variation trend decreased with the increased distance between inlet and the first cage. In this study, the maximum increase value of air speed in CZ near inlet(the zone within27 m from the first cage) was 0.54 m/s, of temperature was 0.2 ℃. Meanwhile, the impact of flaps on environment in CZ was limited. In this study, the influence zone was within 27 m from the first cage. The research illustrated that flap can effectively ameliorate problem of ventilation weak zone and improve cooling efficiency in summer.
作者 程琼仪 李保明 CHENG Qiongyi;LI Baoming(Institute of Energy and Environmental Protection,Academy of Agricultural Planning and Engineering,Ministry of Agriculture and Rural Affairs,Beijing 100125;Key Laboratory of Technologies and Models for Cyclic Utilization from Agricultural Resources,Ministry of Agriculture and Rural Affairs,Beijing 100125;College of Water Resources and Civil Engineering,China Agricultural University,Beijing 100083;Key Laboratory of Agricultural Engineering in Structure and Environment,Ministry of Agriculture and Rural Affairs,Beijing 100083)
出处 《中国家禽》 北大核心 2020年第12期69-74,共6页 China Poultry
基金 国家重点研发计划(2018YFDO500700) 现代农业产业技术体系建设专项资金(CARS-40)。
关键词 鸡舍 导流板 气流 温度 CFD hen house flaps cooling pad airflow CFD.
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  • 1高学平,李伟,宋慧芳,张尚华.进风口对变压器室通风效果的影响[J].土木建筑与环境工程,2012,34(S2):117-122. 被引量:11
  • 2黄立.产蛋鸡热应激的防制[J].中国家禽,2004,26(14):19-20. 被引量:7
  • 3李佃场,徐振浩,周卫东.鸡的热应激及其防制措施[J].中国家禽,2005,27(10):45-47. 被引量:8
  • 4顾宪红,王新谋.高温对蛋鸡生产性能和血浆皮质酮、甲状腺素、孕酮水平的影响[J].畜牧兽医学报,1995,26(2):109-115. 被引量:54
  • 5Albright L D. Airflow through hinged baffle slotted inlets [J]. Journal of Agricultural Engineering Research, 1976, 19 (4) :728 - 732.
  • 6Timmons M B. Use of physical models to predict the fluid motion in slot-ventilated livestock structures [ J ]. Transactions of the ASAE, 1984,27(2) :502 - 507.
  • 7Jin Y,Ogilvie J R. Airflow characteristics in the floor region of a slot ventilated room(isothermal) [ J ]. Transactions of the ASAE, 1992,35 (2) : 695 - 702.
  • 8Zhang G, Strum J S. Jet drop models for control of nonisothermal free jets in a side-wall multi-inlet ventilation system[ J ]. Transactions of the ASAE, 1999,42 (4) : 1121 - 1126.
  • 9Oberreuter M E, Hoff S J. Quantifying factors affecting sidewall air inlet performance [ J ]. Transactions of the ASAE,2000,43(3) :707 - 716.
  • 10Gebremedhin K G, Wu B. Simulation of flow field of a ventilated and occupied animal space with different inlet and outlet conditions [ J ]. Journal of Thermal Biology, 2005,30 : 343 - 353.

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