公猪舍夏季温度和流场数值CFD模拟及验证  

Numerical CFD simulation and verification of summer indoor temperature and airflow field in boar building

作　　者：林加勇[1] 刘继军[2] 孟庆利[3] 雷明刚[1,4,5] 童宇[6] 高云[6,5] Lin Jiayong Liu Jijun Meng Qingli Lei Minggang Tong Yu Gao Yun(College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China College of Engineering, Huazhong Agricultural University, Wuhan 430070, China National Engineering Research Center for Livestock, Wuhan 430070, China College of Animal Science and Technology, China Agricultural University, Beijing 100193, China Beijing Breeding Swine Center, Beijing 100194, China The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070)

机构地区：[1]华中农业大学动物科技学院,武汉430070 [2]中国农业大学动物科技学院,北京100193 [3]北京养猪育种中心,北京100194 [4]国家家畜工程技术研究中心,武汉430070 [5]生猪健康养殖协同创新中心,武汉430070 [6]华中农业大学工学院,武汉430070

出　　处：《农业工程学报》2016年第23期207-212,共6页Transactions of the Chinese Society of Agricultural Engineering

基　　金：现代农业产业技术体系(CARS-36);中央高校基本科研业务费专项资金资助(2013PY052)

摘　　要：为研究夏季全漏缝地板公猪舍湿帘风机蒸发降温效果及舍内环境分布规律,该文利用计算流体力学CFD（computational fluid dynamics）对北京养猪育种中心SPF（Specific Pathogen Free Swine）公猪舍进行模拟研究并通过实测数据进行验证。研究中将漏缝地板作为多孔介质简化,基于标准k-？湍流模型对空载及装猪猪舍内的风速场和温度场进行模拟,通过模拟值与实测值的对比验证模型的合理性。结果表明采用该模型模拟空载时猪舍,风速场模拟值与实测值误差较小,相对误差范围在0.25%-30.8%。模拟温度与实测温度最大绝对误差为0.48 K,平均绝对误差为0.11 K,平均相对误差为0.5%。模拟装猪时的猪舍,温度分布结构与装猪前相似,但整体温度略有上升。该研究可对当前常用的含漏缝地板猪舍建模研究提供参考,并为畜禽舍内改造和建筑实践提供理论依据。The environment inside the livestock building plays a vital role in animal growing and livestock production efficiency. The analysis of the airflow field and the temperature field can clarify the real situation of the environment and find flaws caused by the design of ventilation system and building structure, thus helps improve the building design and increase production efficiency. In this study, we used computational fluid dynamics（CFD） to simulate the airflow field and the temperature field in a Specific Pathogen Free Swine（SPF） boar building of Beijing breeding swine center, which was ventilated with mechanical evaporative cooling system. The boar building had 47 m length, 14.8 m width and 1.2 m height with a deep manure pit in 0.8 m depth. There were four rows and five aisles placed inside. Farrowing crates were used for breeding boars. Each farrowing crate was size in 2.3 m×0.8 m×1.2 m. The floor of the building was slatted in a length of 12 cm with a gap of 2 cm width. One end wall was equipped with the evaporative pads and the other one equipped with four 1.25 m ventilation fans and two 0.9 m ventilation fans. Manure pits ventilation system was equipped with four exhaust fans for extracting harmful gases and odors from the building. A standard k-？ model was built by simplifying slatted floor to porous media for approximating the real situation inside the building. The simulations of temperature field and airflow field in terms of the model were made for both the boar building with and without boars. Measurements experiments were implemented from 21 st to 27 th June in 2012. Forty five measurement points were dispersed uniformly in the building at three different heights, 0.60 m, 1.2 m and 1.7 m above the slatted floor. 6 points at different locations at 0.25 m depth underneath the floor were added to measurements. For each measurement point, we collected both air velocities and temperatures, using a temperature and humidity instrument（Testo608-H1） and an anemometer（Testo-405）, respect

关 键 词：温度 养殖 计算流体力学 公猪舍 气流场 

分 类 号：S26[农业科学—农业水土工程]