RESERACH ON STEAM CONDENSING FLOWS IN NOZZLES WITH SHOCK WAVE

  • Sławomir Dykas Politechnika Śląska
  • Mirosław Majkut
  • Krystian Smołka
  • Michał Strozik

Abstract

In the Institute of Power Engineering and Turbomachinery of the Silesian University of Technology there is an experimental facility dedicated to the wet steam flow investigation through the nozzles and linear cascades, especially to the identification of the both aerodynamic and thermodynamic losses.The proposed work concerns  a novel experimental research comprising the new and more effective  techniques for transonic wet steam flow through Laval nozzles. The applied modern experimental techniques are based on the static pressure measurement and Schlieren technique for flow-field visualization. The Schlieren technique is a well-known method to visualize density gradients in compressible flows. It translates phase differences into amplitudes and sometimes color differences that can be seen.A synchronized instantaneous measurement of the pressure and Schlieren photographs allows to capture unsteady effects in the steam condensing flows. Additionally, the chemical analysis of the condensate is planned in order to estimate the impurities content in steam. It confirms the type of the investigated condensation phenomenon, homogeneous or heterogeneous one. This technique has been already validated and used for losses estimation for very simple test cases.Experimental results will be comparison with CFD calculations. The CFD results will be made using ANSYS-CFX and our in-house code for modelling the steam condensing flows. ACKNOWLEDGEMENTS The presented work was supported by the National Science Centre founds within the PBU–7/RIE5/2012.

References

[1] J. Kotowicz, M. Job, Optimization of the steam part parameters in the GTCC unit with oxy-combustion and the carbon capture installation, Rynek Energii 107 (4) (2013) 48–55.
[2] M. Deich, Tsiklauri, G.V., V. Shanin, Danilin, V.S., Investigation of flows of wet steam in nozzles, Teplofizika Vysokikh Temperatur 1 (1972) 120–129.
[3] T. Krol, Results of optical measurement of diameters of drops formed due to condensation of steam in a laval nozzle., Trans. Inst. Fluid Flow Machinery (Poland) 57 (1971) 19–30.
[4] G. Gyarmathy, Grundlagen einer theorie der nassdampfturbine, Dissertation, Zurich, juris Verlag (1960).
[5] S. Dykas, Numerical calculation of the steam condensing flow. task quarterly, Scientific Bulletin of Academic Computer Centre, Gda´nsk 5 (4).
[6] M. Heiler, Instationare phanomene in homogen/heterogen kondensierenden dusen- und turbinenstromungen, Dissertation, Universitat Karlsruhe (1999).
[7] W. Wróblewski, S. Dykas, A. Gepert, Modelling water vapour flow with heterogeneous condensation (in Polish), no. 95,Wydawnictwo Politechniki ´ Sl ˛ askiej, Gliwice, 2006.
[8] K. Smołka, M. Strozik, M. Majkut, S. Dykas, Możliwości badań eksperymentalnych przepływu pary mokrej w układzie mini-siłowni kondensacyjnej, Vol. 27, Oficyna Wydawnicza Politechniki Warszawskiej, 2011, pp. 233–240.
[9] S. Dykas, W. Wróblewski, H. Łukowicz, Prediction of losses in the flow through the last stage of low pressure steam turbine, International Journal for Numerical Methods in Fluids 53 (2007) 933–945.
[10] W. Wróblewski, S. Dykas, A. Gardzilewicz, M. Kolovratnik, Numerical and experimental investigations of steam condensation in lp part of a large power turbine, ASME J. of Fluids Eng. 131.
[11] J. Frenkel, Kinetic theory of liquids, Oxford University Press, New Jork.
[12] A. Kantrowitz, Nucleation in very rapid vapour expansions, The Journal of Chemical Physics 19 (1951) 1097–1100.
Published
2013-12-03
How to Cite
DYKAS, Sławomir et al. RESERACH ON STEAM CONDENSING FLOWS IN NOZZLES WITH SHOCK WAVE. Journal of Power Technologies, [S.l.], v. 93, n. 5, p. 288--294, dec. 2013. ISSN 2083-4195. Available at: <https://papers.itc.pw.edu.pl/index.php/JPT/article/view/483>. Date accessed: 05 aug. 2021.
Section
RDPE 2013 Conference

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