机动手术舱室内气流组织与温度分布仿真研究

Numerical Simulation for Air Pattern and Temperature Distribution Inside Mobile Operating Compartment with Overpressure Protection Performance

目的:具有超压防护功能的机动手术舱室通过过滤污染空气、建立稳定超压和合理组织气流等方式减少生化污染物的危害,为患者和医生提供安全的舱室环境。方法:利用计算流体动力学方法,对具有超压防护功能的机动手术舱室内的气流运动形式和温度分布进行了仿真研究,分析了在超压防护系统作用下机动手术舱室内的气流组织形式和温度分布规律。结果:在超压防护系统作用下,在人员活动的绝大部分区域内气流速度较低,气流速度分布在0.5m/s以下,气流速度分布较均匀;整个舱室内在垂直方向上不存在明显的温度梯度,在人员活动的绝大区域内温度分布均匀性较好,温度分布在27℃左右,温差在2℃左右。结论:舱室内人员的舒适性较好,舱室内环境能够满足手术作业要求。

Objective Mobile operating compartment with overpressure protection can provide a safety environment for the patients and the surgical team by minimizing the risk of biochemical contamination through appropriate air filtration, steady overpressure foundation and air distribution scheme. Methods The air movement and the temperature distribution inside the mobile operating compartment with the overpressure protection performance were simulated by the technique of computational fluid dynamics （CFD）, the air pattern and the temperature distribution were analyzed. Results The air velocity was under 0.5m/s in the most zone of person activity and the air velocity were distributed uniformly in the mobile operating compartment under the condition of the overpressure protection system. The obvious temperature gradient didn＇t exist in the vertical plane of the mobile operating compartment. The temperature distribution in the mobile operating compartment was quite uniform and the temperature was almost at 27℃ with the temperature difference of almost 2℃. Conclusion The human thermal comfort is good in the mobile operating compartment and the environment in the mobile operating compartment can satisfy requirements of the operation. [Chinese Medical Equipment Journal,2008,29 （4）： 17-19]