Kornienko Yu.N.
A.I. Leypunsky Institute for Physics and Power Engineering, Obninsk, Russia
In this paper we present the derivation of a mathematical model the starting point (the criterion of "origin") for boundaries of fluctuation areas based on the classical equation of a linear oscillator with damping, obtained earlier using a quasi-one dimension (K1M) form non-equilibrium model drift flux model with taking into account subcooled boiling and channels with a riser section. The presented analytical solutions, reflecting K1M in the form of all the components of the pressure loss, feedback and time delay, provide the greatest depth and complete analysis of the results. This paper analyzes the limit transitions obtained generalized models and test the boundaries of "origin" region of density wave instability (DWI) and compared with previous criteria.
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