The present study numerically and experimentally investigates, for the first time in the literature, the thermo-fluid dynamics and ultrafine particle (UFP) concentration in surgical smoke, with diameters smaller than 100 nm, inside an actual operating room (OR) equipped with a turbulent circular diffuser system. The velocity values and temperature fields measured during the experimental analysis at different points in the OR are in reasonable agreement with the numerical results. For UFP diameters smaller than 70 nm, the particle concentration obtained from the numerical analysis agrees with the experimental data. The numerical results have demonstrated that at the sterile zone, UFP concentration caused by candles smoke is around $1.2\times {10}^5-1.6\times {10}^5$ particles/cm³, which are exposed by the occupants in OR. UFP decay time of 25 and 20 minutes are obtained in current analysis, respectively, in order to evaluate the time needed by the ventilation system to evacuate the particles from the OR.

本研究在文献上首次通过数值和实验方法研究了在实际手术室（OR）内装有直径小于100 nm的外科手术烟雾中的热流体动力学和超细颗粒（UFP）浓度。湍流的圆形扩散器系统。在实验分析中在OR的不同点测得的速度值和温度场与数值结果合理吻合。对于小于70 nm的UFP直径，通过数值分析获得的颗粒浓度与实验数据一致。数值结果表明，在无菌区，蜡烛烟引起的UFP浓度约为$1.2\times {10}^5-1.6\times {10}^5$颗粒/ cm ³，这些颗粒在OR中被乘员暴露。在电流分析中，分别获得25和20分钟的UFP衰减时间，以评估通风系统从OR上排出颗粒所需的时间。