超音速两相流极限升压能力的理论与试验研究

采用理论和实验的方法研究了一定汽水参数下的超音速汽液两相流升压装置的极限升压能力以及主要结构参数对其的影响规律。计算与实验的结果表明:超音速汽液两相流升压装置的极限升压能力计算值可达进汽压力的14倍左右,实验值可到进汽压力的2.6倍左右;混合腔和水喷嘴的几何尺寸是影响极限升压能力的最主要的结构参数;极限升压能力随混合腔收缩比增大而增大,随水喷嘴出口与混合腔喉部截面积比增大而减小,随蒸汽喷嘴喉部与出口截面积之比变化不大。计算和实验得到的结构参数对极限升压能力的影响规律是基本一致的。

THEORETICAL AND EXPERIMENTAL RESEARCH ON THE MAXIMUM LIFTING-PRESSURE PERFORMANCE OF STEAM INJECTOR

The maximum lifting-pressure performance of steam injector and the relationships between it and the main structure parameters are studied theoretically and experimentally. The calculation and experiment results show that the calculation value of the coefficient of maximum lifting-pressure performance may be as high as 14 and the experiment value may be as high as 2.6. The area ratio between inlet and outlet of the mixing-chamber and the gap of annular water nozzle are the most important factors lead to the difference between the calculation and experiment values. The maximum lifting-pressure performance increases with the increase of the area ratio between inlet and outlet of the mixing-chamber and the decrease of the gap of annular water nozzle. The relationships between maximum lifting-pressure performance and structure parameters obtained by calculation and experiment are in good agreement.