局部纯净风量的物理意义、获取方法及应用场合
Physical significance, calculation method and applicability of local purging flow rate
摘要：
介绍了局部纯净风量的定义和物理意义，以及基于区域空气流动的马尔可夫过程模型的局部纯净风量获取方法，并给出了利用计算流体力学软件的计算步骤。利用该指标评价了几种典型气流组织的局部区域通风效果，与局部通风量进行了定量对比，讨论了局部纯净风量的实际应用场合及局限性。
关键词：非均匀通风,局部纯净风量,局部通风量,获取方法,局部换气次数
Abstract：
Presents the definition and physical significance of local purging flow rate (LPFR), as well as the calculation method based on Markov model. Proposes a calculation procedure for LPFR by using the computational fluid dynamics (CFD) software. Utilizes LPFR to evaluate the local ventilating effects of several kinds of typical airflow patterns. Qualitatively compares LPFR with local air change rate. Discusses the applications and limitations of LPFR.
Keywords:non-uniform ventilation, local purging flow rate, local ventilation rate, calculation method, local air change rate