Study on Particle Size Prediction of Sodium Atomization Based on Unstable Wave Theory
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摘要: 钠雾化粒径是影响钠雾火燃烧强度的关键因素。由于钠的化学性质不稳定，通常采用水模拟钠开展雾化实验，以得到两者粒径关系。本文基于不稳定波理论，建立了由液体物性参数和雾化压差表征的液体雾化粒径相似性模型，并从压差和物性参数2个角度利用多种液体的不同雾化实验验证模型的适用性。搭建了采用喷嘴模拟破口的水雾化实验装置，得到压差范围在0.1~0.5 MPa范围的水雾化液滴平均粒径，预测了300~600℃的钠在不同压差下雾化液滴的平均粒径。通过本文建立的粒径相似性模型和水模拟钠雾化实验装置，可以实现不同压差下钠泄漏雾化粒径的预测，为钠雾火事故研究提供参考。Abstract: The particle size of sodium atomization is the key factor affecting the combustion intensity of sodium spray fire. Because of the unstable chemical properties of sodium, water is usually used to replace sodium to carry out atomization experiments, and it is necessary to obtain the particle size conversion relationship between them. In this paper, based on the unstable wave theory, the particle size similarity model of liquid atomization characterized by liquid physical parameters and atomization pressure difference is established. The applicability of the model is verified by different atomization experiments of various fluids from the perspectives of pressure difference and physical parameters. Furthermore, an experimental facility for water atomization using nozzle to simulate the crack is designed, the average particle size of water atomized droplets with pressure difference of 0.1~0.5 MPa is obtained, and the average particle size of sodium atomized droplets at 300~600℃ under different pressure differences is predicted. The particle size similarity model and the experimental device for sodium atomization simulation using water established in this paper can realize the prediction of sodium atomization particle size under different pressure differences, and provide reference for the research of Sodium atomization fire accidents.
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Key words:
- Sodium atomization /
- Water atomization /
- Similarity /
- Particle size model /
- Unstable wave waves
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图 3 不同压差下模型的预测情况
Figure 3. Prediction of the Model under Different Pressure Differences
图 6 水模拟钠雾化实验装置示意图
P—压力测点；T—温度测点
Figure 6. Experimental Device for Simulation of Sodium Atomization Using Water
图 8 不同压差下喷嘴出口液滴的可视化图像
Figure 8. Visualization of Droplets at the Nozzle Outlet under Different Pressure Differences
图 9 水雾化液滴平均粒径随压差的变化
Figure 9. Variation of Average Particle Size of Water Atomized Droplets with Pressure Difference
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[1] MANZINI G, TORSELLO G, PAROZZI F. Sodium safety-spray and pool fires ECART modeling[C]. Italy: Proceedings of the 15th International Topical Meeting on Nuclear Reactor Thermal-Hydraulics,Pisa, 2013. [2] BAE J H, AHN D H, KIM Y C, et al. An experimental study on the characteristics of sodium fires[J]. Nuclear Engineering and Technology, 1994, 26(4): 471-483. [3] ZOU W B, ZOU Z Z, TONG L L, et al. Semi-empirical model of droplet size distribution from the maximum entropy principle in sodium spray[J]. Frontiers in Energy Research, 2022, 10: 888738. doi: 10.3389/fenrg.2022.888738 [4] CLARK A J, DENMAN M R, TAKATA T, et al. SNL/JAEA collaborations on Sodium fire benchmarking: SAND2017-12409[R]. Albuquerque: Sandia National Lab. , 2017. [5] ZOU Z Z, TONG L L, CAO X W. Sodium spray fire analysis with combustion space multi-node model for sodium-cooled fast reactor[C]//LIU C M. Proceedings of the 23rd Pacific Basin Nuclear Conference. Singapore: Springer, 2023. [6] DU H O, WANG R D, WANG G Z, et al. Sodium spray research in agon atmosphere[J]. Annual Report of China Institute of Atomic Energy, 2014(81): 175. [7] TORSELLO G, PAROZZI F, NERICCIO L, et al. Characterization of the liquid Sodium spray generated by a pipework hole[C]. U.S.: Proceedings of the 2012 International Congress on Advances in Nuclear Power Plants. La Grange Park: American Nuclear Society, 2012. [8] NAGAI K, HIRABAYASHI M, ONOJIMA T, et al. Sodium leakage and combustion tests-measurement and distribution of droplet size using various spray nozzles: JNC TN9400 99-030[R]. Tokyo: Japan Nuclear Cycle Development Institute, 1999. [9] AOTO K, DUFOUR P, HONGYI Y, et al. A summary of sodium-cooled fast reactor development[J]. Progress in Nuclear Energy, 2014, 77: 247-265. doi: 10.1016/j.pnucene.2014.05.008 [10] OHSHIMA H, KUBO S. Sodium-cooled fast reactor[M]. United Kingdom: Woodhead Publishing, 2016: 97-118. [11] CHEN P C, WANG W C, ROBERTS W L, et al. Spray and atomization of diesel fuel and its alternatives from a single-hole injector using a common rail fuel injection system[J]. Fuel, 2013, 103: 850-861. doi: 10.1016/j.fuel.2012.08.013 [12] LIN S P, LIAN Z W. Absolute and convective instability of a viscous liquid jet surrounded by a viscous gas in a vertical pipe[J]. Physics of Fluids A:Fluid Dynamics, 1993, 5(3): 771-773. doi: 10.1063/1.858662 [13] REITZ R D. Atomization and other breakup regimes of a liquid jet[D]. USA: Princeton University, 1978: 123-130. [14] KITAMURA Y, MISHIMA H, TAKAHASHI T. Stability of jets in liquid-liquid systems[J]. The Canadian Journal of Chemical Engineering, 1982, 60(6): 723-731. doi: 10.1002/cjce.5450600602 [15] ADELBERG M. Mean drop size resulting from the injection of a liquid jet into a high-speed gas stream[J]. AIAA Journal, 1968, 6(6): 1143-1147. doi: 10.2514/3.4686 [16] DOMBROWSKI N, JOHNS W R. The aerodynamic instability and disintegration of viscous liquid sheets[J]. Chemical Engineering Science, 1963, 18(3): 203-214. doi: 10.1016/0009-2509(63)85005-8 [17] WERT K L. A rationally-based correlation of mean fragment size for drop secondary breakup[J]. International Journal of Multiphase Flow, 1995, 21(6): 1063-1071. doi: 10.1016/0301-9322(95)00036-W [18] FINK J K, LEIBOWITZ L. Thermodynamic and transport properties of Sodium liquid and vapor: ANL/RE-95/2[R]. Argonne: Argonne National Lab., 1995. -
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