生物安全柜前窗气流速度模拟及优化

摘要

目的：探究生物安全柜前窗气流的速度最大值和最优值，为规范生物安全柜检测标准提供科学依据。方法：采用计算流体动力学(CFD)理论建立数值模型的方法，对Ⅱ级生物安全柜前窗气流速度进行模拟分析。结果：通过实验得到柜体内气流分布及流动变化图，确定了前窗气流和柜体内部气流速度的关系。结果显示，当前窗气流速度为1.0 m/s时，标准偏差最小，气流稳定性最好。结论：前窗气流的上限速度为1.4 m/s，最优速度为1.0 m/s，数据结论对生物安全柜检测具有一定的借鉴意义。%Objective:In order to explore the maximum and the optimal velocity of front window air in biological safety cabinets and provide a scientific evidence for relevant test. Methods: As classⅡ biological safety cabinet an testing sample, computational fluid dynamics method is adopted to establish numerical model, then made the simulation of front window airflow. Results: The velocity relationship between front window airflow and the internal air has been confirmed. Conclusion:The maximum velocity of the front window flow is 1.4 m/s and the optimal velocity is 1.0 m/s. The tested data and conclusion can give some suggestions and reference for biological safety cabinets detection.