【摘要】 为研究南方地区猪舍湿帘风机的降温效果及热环境变化规律，本研究以广东省江门市某猪场妊娠舍作为对象，利用计算流体力学技术对舍内环境进行三维数值模拟，通过实地测量进行对比验证。研究中抽取猪舍三维模型内的空气流域作为流体域，选用标准k-ε湍流模型对猪舍进行稳态模拟，通过将实测值与模拟值进行对比验证模型的吻合度。结果显示，温度模拟值与实测值最大绝对误差为1.02℃,相对误差范围为0.14%～4.53%,平均相对误差为1.42%;气流速度模拟值与实测值最大绝对误差为0.41 m/s,平均相对误差为9.66%,将实测值与模拟值通过均方误差(NMSE)计算，结果在合理范围内，验证了模型的准确性。模拟结果表明，在猪只躺卧平面的温度、气流速度存在明显的分布梯度，靠近进风口处的温度较高且有气流死区，而且猪群密集受挡风影响，气流不均匀。在不改变猪舍内部结构的前提下，通过在天花板增加通风立柱及导流板提高舍内温度与气流速度分布的均匀性。本研究模拟结果对优化南方妊娠舍的结构设计和环境调控具有参考价值。更多还原

【Abstract】 To investigate the cooling effectiveness and thermal environment dynamics of a pad-and-fan system in swine houses in southern China, this study conducted a three-dimensional numerical simulation of the indoor environment using Computational Fluid Dynamics(CFD). A gestation barn on a farm in Jiangmen City, Guangdong Province, served as the research object, and the simulation results were validated against on-site measurements. The air domain within the 3D model of the barn was extracted as the fluid domain, and the standard k ε turbulence model was adopted for steady-state simulation. The agreement between the simulated and measured values was assessed to validate the model.The results show that the maximum absolute error between simulated and measured temperature was 1.02 ℃, with a relative error ranging from 0.14% to 4.53% and an average relative error of 1.42%. For air velocity, the maximum absolute error was 0.41 m/s, with an average relative error of 9.66%. The normalized mean square error(NMSE) between measured and simulated values fell within an acceptable range, confirming the model’s accuracy. The simulation reveals a distinct gradient in temperature and airflow velocity across the lying plane of the sow. Areas near the air inlet exhibited higher temperatures and stagnant airflow, while airflow distribution was uneven in zones with high animal density due to wind blockage. Without altering the internal structure of the barn, the uniformity of temperature and airflow distribution was improved by adding ventilation columns and guide plates to the ceiling. The findings of this simulation provide a reference for optimizing the structural design and environmental control of gestation barns in southern China.更多还原