Ventilation and air distribution methods play an important role in indoor air quality and thermal environments. Effective airflow distribution within indoor environments has always been a great cause of concern. Attachment ventilation has drawn considerable interest since it is more energy efficient and space saving than traditional mixing or displacement ventilation methods. As a newly developed and applied attachment ventilation method, vertical wall-based attachment ventilation (WAV) was first proposed in the 1990’s by the authors. Later, the concepts of square column-based attachment ventilation (SAV) and circular column-based attachment ventilation (CAV) were also presented to meet the needs of more industrial applications. In this paper, three attachment ventilation methods— i.e., WAV, SAV and CAV are compared based on experimental studies and numerical simulations. For the vertical attachment region, semi-theoretical equations characterizing the dimensionless centerline velocity of WAV, SAV and CAV are proposed. The velocity profiles of all three types of attachment ventilation methods are similar. Of the three attachment ventilation methods, for the same distance y* along the attached wall measured from the slot inlet, the dimensionless centerline velocity of WAV is the largest, while those of SAV and CAV remain almost identical. In the horizontal air reservoir region (air lake zone), the semi-theoretical equations to predict dimensionless centerline velocity also are presented. The results show that for the same distance x normal to the wall/column, the dimensionless centerline velocity of WAV is the largest, followed by SAV and CAV. Additionally, unified semi-theoretical equations are presented for predicting the jet centerline velocity decay of attachment ventilation, which is helpful for the design of air distribution systems in heating, ventilation and air conditioning (HVAC) engineering applications.

通风和空气分配方法在室内空气质量和热环境中起着重要作用。室内环境中有效的气流分配一直是人们关注的重要原因。附件通风引起了极大的兴趣，因为它比传统的混合或置换通风方法更节能，更节省空间。作为一种新开发和应用的附件通风方法，作者于1990年代首次提出了基于垂直壁的附件通风（WAV）。后来，还提出了基于方柱的附件通风（SAV）和基于圆柱的附件通风（CAV）的概念，以满足更多工业应用的需求。本文介绍了三种附件通风方法，即WAV，根据实验研究和数值模拟比较了SAV和CAV。对于垂直附着区域，提出了表征WAV，SAV和CAV的无量纲中心线速度的半理论方程。所有三种类型的附件通气方法的速度曲线都相似。三种附件通风方法中，相同的距离y *沿从插槽入口测量的附着壁，WAV的无因次中心线速度最大，而SAV和CAV的无因次中心线速度几乎保持不变。在水平气藏区（气湖区），还提出了预测无量纲中心线速度的半理论方程。结果表明，对于垂直于墙/柱的相同距离x，WAV的无因次中心线速度最大，其次是SAV和CAV。此外，提出了统一的半理论方程式，用于预测附件通风的射流中心线速度衰减，这有助于设计供暖，通风和空调（HVAC）工程应用中的空气分配系统。