Multiple air supply modes and ventilation characteristics in clean operating room
The static air distribution in a class Ⅱ unidirectional airflow clean operating room with diverse air supply modes was numerically studied.The effects of local horizontal air supply,vertical air supply and air change times per hour(ACH)on the air distribution and the corresponding key evaluation indexes in the operating room were mainly studied.Standard k-e turbulence model based on RANS(Reynolds-averaged Navier-Stokes equations)was used to carry out the numerical simulation to compare the effects on the flow characteristics,the wind speed unevenness,the speed attenuation and air age in the working area under diverse air supply modes and ACH.The results show that for vertical unidirectional flow,the number of ACH should be carefully increased,and the optimal wind speed unevenness can be achieved near z=7/16H(H represents height)of the operation area.Compared with the partial-ventilation vertical unidirectional airflow,the partial-ventilation horizontal unidirectional airflow can better resist the airflow barrier caused by astral lamps and other equipment,but its airflow parameters are easily disturbed by the obstacles in front of the air supply inlet or the position changes of medical staff.Therefore,the barrier-free in front of horizontal air supply inlet should be guaranteed in engineering.
clean operating roomair distributionair change rateair age
NETL
NSTL
万方数据
