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三、北京工人体育馆比赛大厅气流的规律 北京工人体育馆比赛大厅的喷口送风,虽然也是一种受限射流,但是它有下列特点: 1.建筑是圆形的。沿着喷出射流的轴綫能容纳气流的截面是变化的。从四周送风时,喷流末端不是碰到固体板壁而折回,而是和对面的喷流相遇而折回,路綫也更复杂一些(图3-1)。2.有喷流、回流;既要考虑等温射流,也要考虑冷射流和热射流。3.建筑高大,在喷流下部和上部同时有回流。
III. The Law of Airflow in the Hall of the Beijing Workers’ Gymnasium The spout of the Beijing Workers’ Gymnasium is a limited jet, but it has the following characteristics: 1. The building is circular. The cross-section that can accommodate the air flow along the axis of the jet is variable. When the air is blown from all directions, the end of the jet does not touch the solid wall and fold back. Instead, it meets the opposite jet and folds back. The route is also more complicated (Figure 3-1). 2. There are jets, reflux; must consider the isothermal jet, but also consider the cold jet and thermal jet. 3. The building is tall and there is reflux at the lower part and the upper part of the jet.