The pseudo-critical vapour-liquid flow

• Autorzy: Downar-Zapolski P. , Bilicki Z.
• Języki publikacji: EN

Abstrakty

EN

This paper investigates the influence of non-equilibrium evaporation on the properties of the critical flow of vapour-liquid mixture. As the non-equilibrium vapour generation is assumed to be dominant in a vapour-liquid flow, the Homogeneous Relaxation Model (HRM), with non-equilibrium mass transition, is selected and reduced to the equation for the linear pressure waves. Basing on this equation, the evolution of linear pressure wave in the non-equilibrium, two-phase mixture has been calculated. The conclusions coming from this calculations created a background for the concept of the pseudo-critical flow. A short description of the pseudo-critical flow regime is given and the main difference between the critical flow of equilibrium and non-equilibrium fluid are discussed. Finally, the remarks concerning a kind of relativity of the critical flow for non-equilibrium fluids are given.

Słowa kluczowe

EN

evaporation; non-equilibrium

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 1998
• Tom: Vol. 19, no. 3/4
• Strony: 13--25
• Opis fizyczny: Bibliogr. 14 poz.

Twórcy

autor

Downar-Zapolski P.

• ABB Zamech Ltd

autor

Bilicki Z.

• ABB Zamech Ltd

Bibliografia

• [1] REOCREUX, M.: Contribution a l'etude des debits critiques en ecoulement diphasique eau-vapeur, Ph. D. thesis, Université Scientifique et Medicale de Grenoble, 1974.
• [2] SAHA, P., Jo, I.H., NEYMOTIN, L., RAHATGI, U.S. & SLOWIK G.: Independent assessment of TRAC-PD2 and RELAP5/MOD1 codes at BNL in FY 1981, BNL-NUREG-51645, Brookhaven, USA, 1982.
• [3] BILICKI, Z., KESTIN, J. & PRATT, M. M.: A reinterpretation of the results of the Moby Dick experiments in terms of the non-equilibrium model, Transactions of the ASME, J. Fluid Engineering, Vol. 112(1990B), 212-217.
• [4] DOWNAR-ZAPOLSKI, P., BILICKI, Z., BOLLE, L. & FRANCO, J.: The non-equilibrium relaxation model for one-dimensional flashing liquid flow, Int. J. Multiphase Flow, Vol. 22(1996), 473-483.
• [5] BILICKI, Z. & KESTIN, J.: Physical aspects of the relaxation model in two-phase flow, Proc. R. Soc. London A 428, 379-397, 1990A.
• [6] ARDRON, K.H. & DUFFEY, R.B.: Acoustic wave propagation in a flowing liquid-vapour mixture, Int. J. Multiphase Flow Vol. 4, No 6, 1978, 303-322.
• [7] SZANIAWSKI, A.: Propagation of disturbances in a liquid-gas mixture, Engineering Dissertations (Rozprawy Inżynierskie), L7CXI, 5, 1957, 270-329 (in Polish).
• [8] OCKENDON, H. & SPENCE, D. A.: Non-linear wave propagation in a relaxing gas, J. Fluid Mech., 34, 1969.
• [9] COPSON, E. T.: ASYMPTOTIC EXPANSIONS, Cambridge University Press, 1965.
• [10] DOWNAR-ZAPOLSKI, P. & BILICKI, Z.: Problems of criticality and pseudo-criticality in one- dimensional, non-equilibrium flow of one-component, two-phase mixture, Report for the UC, Contrad number ERB EV5VCT930289, November 1996.
• [11] BRILLOUIN, L.: About the propagation of light in dispersive media, Ann. Physik 44/203, 1914.
• [12] BOURE, J. A.: The critical flow phenomenon with reference to two-phase flow and nuclear reactor systems, Symposium on the Thermal and Hydraulic Aspects of Nuclear Reactor Safety, 1: Light Water Reactors, ASME, New York 1977, 195-216.
• [13] LEMONNIER, H. & SELMER-OLSEN, S.: Experimental investigations and physical modelling of two-phase two component critical flow in a converging diverging noule, Int. J. Multiphase Flow 18, 1992, 1-20.
• [14] YAN, F., BOLLE, L., FRANCO, J. & GIOT, M.: Analysis of choked liquid-vapour flows, Proc. Int. Conf. Multiphase Flows (Edited by Matsui, G. et al.), Tsukuba, Japan, Vol. 2(1991), 309-313.