Author(s):
1. Ivana Kecman, Faculty of Mechanical Engineering, Republic of Srpska, Bosnia and Herzegovina
2. Mirko Dobrnjac, Faculty of Mechanical Engineering, Republic of Srpska, Bosnia and Herzegovina
3. Vladimir Stevanović, Mašinski fakultet Univerziteta u Beogradu, Serbia
4. Milan Lečić, Univeristy of Belgrade, Faculty of Mechanical Engineering, Serbia

Abstract:
Objective of this paper is analysis of one-dimensional, uniform two-phase flow of liquid and steam phase. In first part of the calculation, parameters of water, steam and two-phase mixture were obtained by numerical solving of mass, momentum and energy balance equations for one-dimensional one-phase or two-phase compressible fluid. By applying the „two-fluid“ model, solving balance equations for each phase and using corresponding constitutive correlation, parameters of water and steam were obtained as well as volume fraction of water and steam. Balance equations were solved using Runge-Kutta method after they were transformed from partial differential equations to ordinary differential equations. In calculation were took into account change in density due warming along evaporator canal with the assumption that the water heats with uniform heat flux over the entire length. The results of conducted calculation were presented graphically.

Key words:
Two-phase flow, Numerical simulation, Runge-Kutta method, parameters of water and steam, evaporator tube

Thematic field:
Energetics and Thermal Engineering

Date of abstract submission:
27.02.2017.

Conference:
13th International Conference on Accomplishments in Mechanical and Industrial Engineering