Abstract
The specialized multifunctional software package is developed for the numerical simulation of the flow of products of combustion in a Laval nozzle. The complex has a friendly graphical user interface of input-output and wide possibilities for visualization of simulation results directly in the process of calculating. Particles moving in the gas stream are exposed to the action of hydro-mechanical forces due to its interaction with the carrier gas environment, as well as mass forces caused by the gravitational field. Performed parametric calculations have shown that the interaction of particles with the combustion products, even with a relatively small volume fraction may lead to a qualitative change in the internal flow in the Laval nozzle, and thereby influence the characteristics of the nozzle.
Highlights
Particles moving in the gas stream are exposed to the action of hydro-mechanical forces due to its interaction with the carrier gas environment, as well as mass forces caused by the gravitational field
Performed parametric calculations have shown that the interaction of particles with the combustion products, even with a relatively small volume fraction may lead to a qualitative change in the internal flow in the Laval nozzle, and thereby influence the characteristics of the nozzle
The physical model of the motion of particles in the gas flow In the construction of mathematical and computational models that describe the interaction of condensed particles with combustion products in channels with variable cross section, we shall proceed from the following basic assumptions:
Summary
2. The physical model of the motion of particles in the gas flow In the construction of mathematical and computational models that describe the interaction of condensed particles with combustion products in channels with variable cross section, we shall proceed from the following basic assumptions: the movement of the carrier medium is described by the system of gas dynamics equations; the particles of condensed phase have a spherical shape; the particles undergo aerodynamic drag force and the force of gravity only; the processes of collision, fragmentation and coagulation can be neglected; an exchange of energy, impulse and mass in general case is a result of the interaction of individual particles with the gas flow; mutual particles affect at each other is through the interaction of the gas flow. Since the processes of collision, crushing and particle coagulation are neglected in this model, the only possibility of their interaction with each other is mutual influence through the changed by them gas-dynamic parameters of the carrier medium
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