环形射流作用下吸气流动的研究

建立了环形射流作用下的吸气流动实验台，设计了带有产生旋转射流叶片的风口。测量了该吸气流动在不同工况下的临界射流速度、速度场分布、有效作用范围。利用回归的方法对临界射流速度的实验数据进行分析，得到其与吸气量、吹气口宽度、叶片数三个因素的关系表达式。用理论分析确定速度分布，并在其基础上计算有效作用范围，结果均与实验数据吻合得较好。

Research of suction-airflow affected by annular jet

Establishes an experiment platform for suction-airflow affected by annular jet and designs a ventilation inlet with blades engendering rotating jet. Measures critical jet velocity, velocity field distribution and effective limits of this suction-airflow under different conditions. Analyses experiment data of critical jet velocity with regression method, and formulates an expression in which critical jet velocity is correlated with the quantity of suction-air, the width of pushing-air inlet and the number of blade. Ascertains velocity distribution by theoretical analyses, and calculates effective limits of air-flow based on the analysis results. The results accord with experiment data fairly.