Discharge of a gas-saturated liquid through a nozzle

Abstract

In this study we concern ourselves with the flow of a liquid in a nozzle when bubbles of dissolved gas form. The flow of a boiling liquid in channels was considered in [1, 2]. The flow of a liquid in a nozzle when individual gas bubbles appear in the stream was studied theoretically and experimentally in [3].1. We consider the flow of a gas-saturated liquid at a pressure Ps in a varying-area channel. Because the pressure drops to p < Ps the liquid may boil (a gas-vapor phase may form) in the stream because of dynamic processes. The following assumptions were made when constructing mathematical model in the quasi-one-dimensional approximation. A gas phase is formed only because of the literature of dissolved gas, accompanied by diffusion processes (the liquid is assumed to be cold and thus the partial vapor pressure of the liquid in the gaseous medium is ignored). Dissolved gas is released at impurity particles with an initial concentration n o . Moreover, the phase velocities are equal and the forces of the friction of the stream against the channel wall is neglected. The temperature of the system is constant at T O .With the above assumptions the equations of conservation of mass for the liquid phase (parameters with a subscript) (i = /) in the zone of two-phase flow have the form [1, 2] (1.4)Tyumen'.