ISSN 1991-2927
 

ACP № 3 (65) 2021

Author: "Maria Igorevna Kornilova"

Aleksandr Nikolaevich Zolotov, Post-graduate Student at the Department of Heat-and-Power Engineering of Ulyanovsk State Technical University; graduated from Ulyanovsk State Technical University; graduated from Ulyanovsk State Technical University; an author of articles in the field of the numerical modeling of gas-dynamic processes. [e-mail: anzolotov@bk.ru]A. Zolotov,

Vladislav Nikolaevich Kovalnogov, Ulyanovsk State Technical University, Doctor of Engineering, Head of the Department of Heat-and-Power Engineering of Ulyanovsk State Technical University; an author of articles, monographs, and inventions in the field of simulation, research, and optimization of thermal and gas-dynamic processes in power installations and processing equipment. [e-mail: kvn@ulstu.ru]V. Kovalnogov,

Maria Igorevna Kornilova, Ulyanovsk State Technical University, a second-year student of Ulyanovsk State Technical University; an author of articles in the field of the numerical modeling of gas-dynamic processes. [e-mail: masha.kornilova.1995@mail.ru]M. Kornilova

Modeling and Researching the Technique of Thermal Protection of Turbomachines Blades With the Use of Gas-dynamic Temperature Stratification 000_12.pdf

Raising the initial temperature and pressure of the working fluid is one of the simplest and most effective ways of improving fuel efficiency and reducing metal consumption of turbines. Traditional technology of turbine blades production is quite cost and time consuming in production. Therefore, their creation requires the use of mathematical models which serve as a tool for analysis, improvement and selecting the most promising solutions of the refrigeration and increase of the prediction accuracy at the design stage of their effectiveness. Mathematical modeling of the thermal state is widely used in the creation of modern gas turbines [1]. An important objective is the numerical simulation of the spatial flow of the heat transfer in subsonic and transonic lattices. In order to create effective ways of thermal protection, it is necessary to know the distribution of nonstationary temperature fields on the surface and in the body of the scapula. For this purpose, the heat flows from the gas to the blades must be accurately determined taking into account the impact of the mode of flow, thermals, pressure gradient, and other factors [2]. In the paper, the proposed mathematical model and method of numerical investigation of the thermal state of blades of turbomachines streamlined by a supersonic dispersed flow with regard to the phenomenon of gas-dynamic temperature stratification was proposed. With the aim to increase the accuracy of the settlement prediction of the thermal state of blades due to obtaining reliable data as well as improve the efficiency of cooling systems to increase the service life of the blades, the authors have developed the program-informational complex which will take into account the results of studies of gas-dynamic processes in high- speed, disperse flows including the phenomenon of gas-dynamic temperature stratification carried out at the Department of Heat Power Engineering at Ulyanovsk State Technical University.

Mathematical modeling, numerical methods, thermal protection, convective-film cooling, software and information complex, dispersed flow, gas-dynamic temperature stratification.

2015_ 4

Sections: Mathematical modeling

Subjects: Mathematical modeling, Computer-aided engineering.


Ruslan Vladimirovich Fedorov, Ulyanovsk State Technical University, Candidate of Engineering, Associate Professor at the Department of Heat Power Engineering at Ulyanovsk State Technical University; graduated from Ulyanovsk State Technical University; an author of articles and inventions in the field of numerical modeling the hydro-gas-dynamic processes. [e-mail: r.fedorov@ulstu.ru]R. Fedorov,

Dmitrii Aleksandrovich Generalov, Ulyanovsk State Technical University, Post-Graduate Student at the Department of Heat Power Engineering at Ulyanovsk State Technical University; graduated from Ulyanovsk State Technical University; an author of articles and inventions in the field of numerical modeling the hydro-gas-dynamic processes. [e-mail: dmgeneralov@mail.ru]D. Generalov,

Maria Igorevna Kornilova, , a second year student at Ulyanovsk State Technical University; an author of articles in the field of numerical modeling the hydro-gas-dynamic processes. [e-mail: masha.kornilova.1995@mail.ru]M. Kornilova

Mathematical Modeling and Numerical Analysis of a Thermal State of Turbo-mashine Blades Affected By a Supersonic Dispersed Flow 38_7.pdf

The development of the advanced gas-turbines must ensure their operation under the conditions of an increasing temperature of a working body to improve the efficiency during in a reliable and efficient operation. In this paper, a mathematical model and a method of a numerical research of a thermal state of turbo-machine blades affected by a supersonic dispersed flow including a gas-dynamic temperature stratification phenomenon are introduced. The adequacy of a turbulent dispersed boundary layer model was verified by comparing the calculation of the heat transfer coefficients of the dispersed flow in the nozzles with the experimental data. In order to improve the accuracy of the calculated prediction of the thermal state of the blades due to obtaining the reliable data, as well as the efficiency of cooling systems for the increasing resource of the blades, a software and information complex integrated into the Solid Works package is currently being developed on the base of the Turbo Works package at the Department of Heat Power Engineering of Ulyanovsk State Technical University. The research results of the temperature stratification will be included into this software and information complex as a unique information base. As the analysis of the numerical study results shows, the application of the developed convective-film cooling temperature provides the temperature reduction to the trailing edge of the turbo machine blade by 1.6 times compared with the convection cooling.

Mathematical modeling, numerical methods, thermal protection, convective-film cooling, software and information complex, dispersed flow.

2014_ 4

Sections: Mathematical modeling

Subjects: Mathematical modeling.


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