Pressure Elevation of High-Performance Steam-Water Condensing-Injector
Pressure Elevation of High-Performance Steam-Water Condensing-Injector
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DOI：
10.1016/j.ijheatmasstransfer.2021.120971
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发表时间：
2021-05
影响因子：
5.2
通讯作者：
Shuichiro Miwa;Yifei Xu;T. Hibiki;H. Sakashita;K. Sawa
中科院分区：
文献类型：
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作者：
Shuichiro Miwa;Yifei Xu;T. Hibiki;H. Sakashita;K. Sawa
蒸汽-水冷凝喷射器（SI）是能够通过在比入口流更高的压力下组合蒸汽和过冷液体射流来产生高压过冷液体流的装置。本研究使用超音速蒸汽和过冷水射流研究了SI的压力升高机制。实验使用配备有溢流口的SI型中心水喷射器在0.3至0.7MPa的入口蒸汽压力和0.4至0.7kg/s的入口液体质量流速下进行。测量了混合喷嘴和扩压器截面的轴向压力和温度分布，以研究压力升高机理。在Grolmes（1968）的分析基础上，将SI的两相流区处理为反向环状流和分散流，建立了一维解析模型。对于当前的SI几何形状和操作条件，本一维模型可以预测SI的轴向压力分布和最大排出压力，对于足够高的入口流量比条件具有合理的精度。
The steam-water condensing injector (SI) is a device capable of producing high-pressure subcooled liquid streams by combining steam and subcooled liquid jet at a higher pressure than the inlet streams. The present study investigated the SI's pressure elevation mechanism using supersonic steam and a subcooled water jet. The experiment was carried out using central-water jet type SI equipped with an overflow port at the inlet steam pressures of 0.3 to 0.7 MPa and inlet liquid mass flow rates of 0.4 to 0.7 kg/s. Axial pressure and temperature distributions were measured at the mixing nozzle and diffuser sections to study the pressure elevation mechanism. Based on the analytical foundation laid by Grolmes (1968), the one-dimensional analytical model was implemented by treating SI's two-phase flow regimes as inverted annular and dispersed flows. For the current SI geometry and operating conditions, the present one-dimensional model could predict the axial pressure distribution of the SI and the maximum discharging pressure with reasonable accuracy for sufficiently high inlet flowrate ratio conditions.