Open AccessDevelopment of a generalized physical and mathematical model of working substance processes in an axial turbine stage
Author(s) -
В. А. Калытка,
Михаил Владимирович Коровкин,
P Sh Madi,
A. D. Mekhtiyev,
A. V. Bashirov,
R A Mekhtiev
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1843/1/012017
Subject(s) - bernoulli's principle , mechanics , nozzle , adiabatic process , working fluid , turbine , control volume , thermodynamics , flow (mathematics) , fluid mechanics , thermodynamic process , isentropic process , steam turbine , mathematical model , physics , material properties , quantum mechanics
Methods of continuum mechanics and equilibrium thermodynamics are used to study a generalized physical and mathematical model of the processes of a working substance (steam, gas) moving in the flow part of an axial turbine stage in the nominal operating mode of the turbine. The mathematical description of the hydrodynamics and thermodynamics of the process is carried out for a one-dimensional model, based on the energy equation in thermomechanical form (the first law of thermodynamics in combination with the Bernoulli equation) for the gas (or steam) flow during its adiabatic (isentropic) expansion in the direction of the axis of the turbine stage. The energy equation is written taking into account both thermodynamic (due to the thermal movement of particles) and hydraulic pressure forces (due to the mechanical action of a continuous medium) of the working substance flow on the walls of the stage flow channel. Numerical calculation of flow rates and enthalpy losses on various elements of the stage (nozzle and working blades) is performed on the example of a model turbine with eight axial-type stages, under specified initial conditions of the process.