陈伟雄西安交通大学教师主页管理系统 Research on the steam jet length with different nozzle structures, 中文主页

Research on the steam jet length with different nozzle structures,

摘要：: The effect of nozzle structure on the steam jet lengths of submerged condensation in quiescent water is
investigated theoretically and experimentally. Two typical nozzles are analyzed and tested. Theoretical
analysis shows that nozzle structure has a great influence on the steam jet length but was paid little
attention before. Then a theoretical model for steam jet length with different nozzle structures is proposed based on the expansion and compression wave theory. Theoretical model indicates that steam
jet length is greatly affected by nozzle structure. The steam jet length of straight pipe nozzle is longer
than that of orifice nozzle under the same pool water temperature and steam mass flux, and the steam
jet length is inverse proportion to the maximum expansion ratio, approximately. Then the theoretical
model is verified by the experimental results. Finally, a universal semi-empirical correlation considering
the nozzle structure is proposed. The prediction length corresponds to the experimental data very
well and the discrepancy is within ±25% for different nozzle structures for the steam mass flux 400–
800 kgm2s1 and water temperature 10–70 C