对消防楼梯间及其前室的正压送风是高层建筑防火设计中通常采用的措施之一。本文根据流体力学的基本理论,同时考虑到高层建筑的特点以及火灾层、正压送风区内的温度、压力变化等因素,推导整理出一系列有关正压送风量的计算公式,克服了以往计算公式中的种种缺陷和不足。 Positive air supply to fire-fighting stairwells and their front rooms is one of the commonly used measures in fire protection design of high-rise buildings. Based on the basic theory of fluid mechanics, taking into account the characteristics of high-rise buildings and factors such as temperature and pressure changes in the fire floor and positive pressure supply zone, this paper deduces a series of calculation formulas related to positive pressure air supply and overcomes Various defects and deficiencies in previous calculation formulas.