中文摘要：

采用高速全流场显示技术与PIV相结合，观测了平板表面通气流场的流动结构和运动特性，通过改变来流速度和通气量，讨论了不同Re、通气率对气、液两相流的影响，结果表明：通气率不变时，随着Re增加，通气气泡的透明度依次呈现透明、半透明状和比较均匀分布的水气混合模糊状态。不同Re，改变通气率Qv对平板表面的通气流动的影响差异较大。低Re时，随着通气率增加，平板表面的通气气泡由不规则的细长状、椭球状逐步向球状转变；高Re时，通气气泡扩展成带状，通气率增加使气泡带的宽度和厚度明显扩大。平板表面通气流动的时均速度场分布为稳定的孔前低速区、近壁面气泡区和主流高速区，涡量区分为主流区和气泡区。随如和通气率改变，通气流场的速度和涡量分布呈现不同的特点。

英文摘要：

Structure and kinetic characteristic of ventilated flow around a plan are studied by using High Speed Flow Visualization and PIV. Two phases flow of gas and liquid is discussed when Re and Qv are changed along with velocity of main flow and ventilated flow rate, respectively. There are several conclu- sions. Ventilated bubbles transform from transparent, half-transparent to vague along with increasing Re. To different Re, diversities of ventilated flow are present when Qv is increased. To lower Re, shapes of ven- tilated bubbles are from long and thin bubbles, ellipsoid to ball. To higher Re, shapes of ventilated bubbles are ribbons and ventilated gas enlarge the length and thickness of ribbon bubbles. Distribution of velocity and vorticity are changed by following the different Re and Qv.