Control-volume-based model of the steam-water injector flow

• Autorzy: Kwidziński R.
• Języki publikacji: EN

Abstrakty

EN

The paper presents equations of a mathematical model to calculate flow parameters in characteristic cross-sections in the steam-water injector. In the model, component parts of the injector (steam nozzle, water nozzle, mixing chamber, condensation wave region, diffuser) are treated as a series of connected control volumes. At first, equations for the steam nozzle and water nozzle are written and solved for known flow parameters at the injector inlet. Next, the flow properties in two-phase flow comprising mixing chamber and condensation wave region are determined from mass, momentum and energy balance equations. Then, water compression in diffuser is taken into account to evaluate the flow parameters at the injector outlet. Irreversible losses due to friction, condensation and shock wave formation are taken into account for the flow in the steam nozzle. In two-phase flow domain, thermal and mechanical nonequilibrium between vapour and liquid is modelled. For diffuser, frictional pressure loss is considered. Comparison of the model predictions with experimental data shows good agreement, with an error not exceeding 15% for discharge (outlet) pressure and 1 K for outlet temperature.

Słowa kluczowe

EN

balance equations; condensation; irreversible losses; supercritical steam-water injector; thermodynamic nonequilibrium

PL

kondensacja; nadkrytyczny dozownik wodno-gazowy; nierównowaga termiczna; równanie bilansowe; straty nieodwracalne

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2010
• Tom: Vol. 31, no. 1
• Strony: 45--59
• Opis fizyczny: Bibliogr. 11 poz.,Rys., tab., wykr., wz.

Twórcy

autor

Kwidziński R.

• The Szewalski Institute of Fluid-Flow Machinery, Polish Academy of Sciences, Fiszera 14, 80-231 Gdańsk, Poland,

Bibliografia

• [1] NARABAYASHI T., OHMORI S., MORI M., ASANUMA Y., IWAKI CH.: Development of multi-stage steam injector for feedwater heaters in simplified nuclear power plant, Japan Society of Mechanical Engineers International Journal, Series B, 49 (2006), No. 2, 368-376. [http://www.jstage.jst.go.jp/article/jsmeb/49/2/368/_pdf]
• [2] TRELA M., KWIDZIŃSKI R., GŁUCH J., BUTRYMOWICZ D.: Analysis of application of feed-water injector heaters to steam power plants, Polish Maritime Research, Special Issue No. I (63) Vol. 16(2009), 62-67.
• [3] TRELA M., KWIDZIŃSKI R.: Influence of the expansion in a steam nozzle on the performance of two-phase ejector, International Seminar on Ejector/Jet-pump Technology and Application, Louvain-la-Neuve, Belgium, Sept. 7-9, 2009, Paper No. 10, CD-ROM.
• [4] TRELA M., BUTRYMOWICZ D.: Investigation of heat transfer in supersonic steam-water injector, Proc. 10th Int. Conf. on Heat Transfer and Renewable Sources of Energy 2004, Międzyzdroje - Szczecin, Poland, 645-652.
• [5] TRELA M, KWIDZIŃSKI R., BULA M.: Maximum discharge pressure of supercritical two-phase steam injector, Archives of Thermodynamics, 25 (2004), No. 1, 41-52.
• [6] TRELA M, KWIDZIŃSKI R., BUTRYMOWICZ D., JAWOREK A., DUMAZ P.: Studies of physical phenomena of two-phase flow in steam-water injector, 11th International Topical Meeting on Nuclear Reactor Thermal-Hydraulics (NURETH-11), Avignon, France, Oct. 2-6, 2005, Paper No. 090, CD-ROM
• [7] IDELCHIK I. E.: Handbook of Hydraulic Resistance, (3rd Edition), Begell House, New York 1996.
• [8] KWIDZIŃSKI R., TRELA M.: Investigation of steam injector with variable throat cross-section, Archives of Thermodynamics, 28 (2007), No. 1, 3-14.
• [9] TRELA M., BUTRYMOWICZ D., DUMAZ P.: Experimental investigations of heat transfer in steam-water injector, 5th International Conference on Multiphase Flow (ICMF'04), Yokohama, Japan, May 30-June 4, 2004, Paper No. 544, CD-ROM.
• [10] FERRI R., ACHILLI A., GANDOLF S.: DEEPSSI Project: IETI Component Test, Experimental Data Report, Societa Informazioni Esperienze Termoidrauliche (SIET), Document 00 966 RP 02, 2002.
• [11] FERRI R., ACHILLI A., GANDOLF S.: DEEPSSI Project: IETI Additional Component Test, Experimental Data Report, Societa Informazioni Esperienze Termoidrauliche (SIET), Document 00 987 RP 02, 2002.