论文部分内容阅读
表面风压系数和开口流量系数是多区域模型的自然通风计算基础。本文通过文献综述系统梳理两系数的研究结果。综述表明,流态变化与两系数密切相关,伯努利原理是理解两系数变化的重要依据。建筑体型与设计、风向、上游地貌和周边建筑遮挡是影响表面风压系数的关键因素。小开口具有恒定的静止空气流量系数。大开口热压通风下的流量系数与室内外温差、开口的垂直位置、宽度和厚度有关,风压通风下的流量系数与开口率、风向和进出风口面积比有关。房间内部流动阻力对流量系数有一定影响。
Surface air pressure coefficient and open flow coefficient are the basis of natural ventilation calculation of multi-area model. This article systematically reviews the research results of two coefficients through literature review. The review shows that the change of flow regime is closely related to the two coefficients. Bernoulli’s principle is an important basis for understanding the change of two coefficients. Building size and design, wind direction, upstream topography and the surrounding building blockage are the key factors affecting the surface wind pressure coefficient. Small openings have a constant coefficient of still air flow. The flow coefficient under the large opening heat pressure ventilation is related to the indoor and outdoor temperature difference, the vertical position, the width and the thickness of the opening, and the flow coefficient under the air pressure ventilation is related to the opening ratio, the wind direction and the area ratio of the inlet and the outlet. Flow resistance within the room has a certain impact on the flow coefficient.