Research on Mechanism of Two Phase Flow Lifting Pressure Equipment and Output Regulation

Abstract:

Taking into account the process and mechanism of lifting pressure were complex due to the condensation and shock wave, a one-dimensional theory model based on direct contact condensation is presented to analyze the lifting pressure character of steam-water two phase flow injector, and some key issues, such as inter-phase mass transfer computed by the average condensation heat transfer coefficient and phase volume fraction determined by steam plume, are discussed in detail. The regulations of discharge mass flow and output temperature are decoupling control according to the theory model, and the inlet water mass flow is to determine the output temperature, the variable throat section of steam nozzle is to determine the discharge mass flow.

• Periodical: Advanced Materials Research (Volumes 430-432)
• Pages: 1619-1623
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.430-432.1619
• Online since: January 2012
• Authors: Gang Li, Yun Hong Huang, Zhi Lin Lv, Hui Lan Huang
• Keywords: Direct Contact Condensation, Injector, Phase Change, Steam Plume, Two-Phase Flow

References

[1] G Cattadori, L Galbiati, L Mazzocchi, A single-stage high-pressure steam injector for next-generation reactors: test result and analysis,J. Int. J. Multiphase Flow. 21(1995)591-606.

DOI: 10.1016/0301-9322(94)00086-y

[2] T Narabayashi, M Mori, M Nakamaru, Study on two-phase flow dynamics in steam injectors, Ⅱ: high-pressure tests using scale-models,J. Nuclear Engineering and Design. 200(2000)261-271.

DOI: 10.1016/s0029-5493(00)00237-5

[3] Jun J Yan, J P Liu, W C Lin, Research on Mechanism of Steam-Water Two-Phase Flow Injector, J. Nuclear Power Engineering. 22(2001)490-493(in Chinese).

[4] M H Chun, K Yeon-Sik, P Jee-Won, An investigation of direct condensation of steam jets in sub cooled water, J. International Communication of Heat and Mass Transfer. 23(1996) 947-958.

DOI: 10.1016/0735-1933(96)00077-2

[5] H Y Kim, Y Y Bae, C H Song, Experimental Study on Stable Steam Condensation in a Quenching Tank,J. International Journal of Energy Research. 25(2001)239-252.

DOI: 10.1002/er.675

[6] SF Shao, J J Yan, Y Cao, Experimental research on flow and condensation of supersonic steam jet immerged in sub cool water, J. Journal of Engineering Thermo Physics. 28(2007)68-70 (in Chinese).

[7] P Anka, Analytical study of flow regimes for direct contact condensation based on parametrical investigation,J. ASME Journal of Pressure Vessel Technology. 127(2005)20-25.

DOI: 10.1115/1.1845471

[8] N Beithou, H S Aybar, High-Pressure Steam-Driven Jet Pump, Part Ⅰ: Mathematical Modeling ,J. Journal of Engineering for Gas Turbines and Power. 123(2001)693-700.

DOI: 10.1115/1.1365934

[9] J J Yan, J P Liu, Q A Xing, et al. Research on lifting pressure process of supersonic steam-water two-phase flow in channel of variable section, J. Journal of Engineering Thermo Physics. 24(2003)599-602(in Chinese).

[10] L J Zhao, D L Zeng, P Yuan, The thermo dynamic analysis of the supersonic flow and shock of two-phase flow, J. Journal of Engineering Thermo Physics. 22(2001)284-286(in Chinese).