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中文摘要：
本文对蒸汽射流中汽水直接接触凝结引起的压力振荡强度进行了实验研究。实验采用8mm音速喷嘴，蒸汽质量流率512～865kg／（㎡.s），冷却水温度20～55℃实验观察到渐缩形、膨胀一收缩形、双膨胀一收缩形和双膨胀一发散形四种典型汽羽形状，给出了汽羽周围空间平均压力脉冲分布图以及平均压力脉冲随冷却水温度、蒸汽质量流率的变化规律。实验结果表明，随着冷却水温度升高，平均压力脉冲曲线呈上升趋势，随着蒸汽质量流率的增加，在喷嘴出口附近平均压力脉冲增大，在远离喷嘴出口处平均压力脉冲基本保持不变。
英文摘要：
The magnitude of pressure oscillation caused by direct contact condensation of sonic steam jet was investigated experimentally. The steam mass flux was in the range of 512～865 kg/（㎡.s） while the cooling water temperature 20～55℃. The nozzle diameter was 8 mm. Typical steam plume shapes as contraction shape, expansion-contraction shape, double expansion-contraction shape and double expansion-divergent shape were observed in the experiments. Meanwhile the average pressure pulse distribution maps, relationships between the average pressure pulse and the cooling water temperature, the average pressure pulse and the steam mass flux were given. The experimental results indicated that the average pressure pulse curve increased with the increasing temperature of cooling water. And the average pressure pulse increased significantly with the increasing steam mass flux near the nozzle exit, while keeping constant far away from the exit.
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