Air horizontal jets into quiescent water
0
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
Gas submerged jet is an outstanding thermohydraulic phenomenon in pool scrubbing of fission products during a severe nuclear accident. Experiments were performed on the hydraulic characteristics in the ranges of air mass flux 0.1e1400 kg/m2 s and nozzle diameter 10e80 mm. The results showed that the dependence of inlet pressure on the mass flux follows a power law in subsonic jets and a linear law in sonic jets. The effect of nozzle submerged depth was negligible. The isolated bubbling regime, continuous bubbling regime, transition regime, and jetting regime were observed in turn, as the mass flux increased. In the bubbling regime and jetting regime, the air volume fraction distribution was approximately symmetric in space. Themelis model could capture the jet trajectory well. In the transition regime, the air volume fraction distribution loses symmetry due to the bifurcated secondary plume. The Li correlation and Themelis model showed sufficient accuracy for the prediction of jet penetration length
Abstract
Gas submerged jet is an outstanding thermohydraulic phenomenon in pool scrubbing of fission products during a severe nuclear accident. Experiments were performed on the hydraulic characteristics in the ranges of air mass flux 0.1e1400 kg/m2 s and nozzle diameter 10e80 mm. The results showed that the dependence of inlet pressure on the mass flux follows a power law in subsonic jets and a linear law in sonic jets. The effect of nozzle submerged depth was negligible. The isolated bubbling regime, continuous bubbling regime, transition regime, and jetting regime were observed in turn, as the mass flux increased. In the bubbling regime and jetting regime, the air volume fraction distribution was approximately symmetric in space. Themelis model could capture the jet trajectory well. In the transition regime, the air volume fraction distribution loses symmetry due to the bifurcated secondary plume. The Li correlation and Themelis model showed sufficient accuracy for the prediction of jet penetration length
참고문헌 (22)
- C. Berna, "Enhancement of the SPARC90 code to pool scrubbing events under jet injection regime", Nucl. Eng. Des, 300, pp.563~577 (2016)
- E. O. Hoefele, "Flow regimes in submerged gas injection", Metall. Trans. A B, 10(4), pp.631~648 (1979)
- N. K. Kyriakides, "Bubbling from nozzles submerged in water : transitions between bubbling regimes", Can. J. Chem. Eng, 75(4), pp.684~691 (1997)
- M. K. Tripathi, "Dynamics of an initially spherical bubble rising in quiescent liquid", Nat. Commun, 6 (2015)
- E. Loth, "Structure of underexpanded round air jets submerged in water", Int. J. Multiphas. Flow, 15(4), pp.589~603 (1989)
- G. Lipari, "Review of experimental data on incompressible turbulent round jets", Flow, Turbul. Combust, 87(1), pp.79~114 (2011)
- E. J. List, "Mechanics of Turbulent Buoyant Jets and Plumes" (1982), Pergamon
- N. J. Themelis, "Gas-liquid momentum transfer in a copper converter", Am. Inst. Min. Metall. Pet. Eng, 245(11), pp.2425~2433 (1969)
- S. Someya, "Entrained droplets in underexpanded gas jet in water", J. Visual, 14(3), pp.225~236 (2011)
- K. Harby, "An experimental investigation on the characteristics of submerged horizontal gas jets in liquid ambient", Exp. Therm. Fluid Sci, 53, pp.26~39 (2014)
- J. Ma, "A mathematical approach to submerged horizontal buoyant jet trajectory and a criterion for jet flow patterns", Exp. Therm. Fluid Sci, 92, pp.409~419 (2018)
- P. Dong, "Experimental study of submerged gas jets in liquid cross flow", Exp. Therm. Fluid Sci, 112, pp.109998~ (2020)
- K. Harby, "Modelling and experimental investigation of horizontal buoyant gas jets injected into stagnant uniform ambient liquid", Int. J. Multiphas. Flow, 93, pp.33~47 (2017)
- J. Ma, "Dimensional analysis and experimental study of gas penetration depth model for submerged side-blown equipment", Exp. Therm. Fluid Sci, 75, pp.220~227 (2016)
- A. Emami, "Study of downward gas jets into a liquid", AIChE J, 54(9), pp.2269~2280 (2008)
- S. Rassame, "Void penetration length from air injection through a downward large diameter submerged pipe in water pool", Ann. Nucl. Energy, 94, pp.832~840 (2016)
- C. Weiland, "Round gas jets submerged in water", Int. J. Multiphas. Flow, 48, pp.46~57 (2013)
- W. Li, "Experimental investigations on the interfacial characteristics of steam-air mixture sonic jets in subcooled water", Int. J. Heat Mass Tran, 144, pp.118640~ (2019)
- J. Xiao, "Effect of nozzle geometry on pressure drop in submerged gas injection", J. Cent. S. Univ, 26, pp.2068~2076 (2019)
- O. Tramis, "Torricelli's curtain: morphology of horizontal laminar jets under gravity", Phys. Fluids, 33(6) (2021)
- D. Shao, "Flow patterns and mixing characteristics of horizontal buoyant jets at low and moderate Reynolds numbers", Int. J. Heat Mass Tran, 105(Supplement C), pp.831~846 (2017)
- W. Li, "Investigations on the penetration length of steam-air mixture jets injected horizontally and vertically in quiescent water", Int. J. Heat Mass Tran, 122, pp.89~98 (2018)