Substantiation of a turbulent viscosity model for studying the characteristics of a coaxial propfan and input device of a gas turbine engine
The issues of substantiation of the most rational, based on adequacy, model of turbulent viscosity for mathematical modeling of the flow near the propfan and in the inlet of the turbine-propeller engine are considered. It was found that at present there is no universal turbulence model for determini...
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National Aerospace University «Kharkiv Aviation Institute»
2021
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oai:doaj.org-article:4273fb93ff1b49c3b146651207889f3f2021-11-09T07:52:42ZSubstantiation of a turbulent viscosity model for studying the characteristics of a coaxial propfan and input device of a gas turbine engine1727-73372663-221710.32620/aktt.2021.4.05https://doaj.org/article/4273fb93ff1b49c3b146651207889f3f2021-08-01T00:00:00Zhttp://nti.khai.edu/ojs/index.php/aktt/article/view/1438https://doaj.org/toc/1727-7337https://doaj.org/toc/2663-2217The issues of substantiation of the most rational, based on adequacy, model of turbulent viscosity for mathematical modeling of the flow near the propfan and in the inlet of the turbine-propeller engine are considered. It was found that at present there is no universal turbulence model for determining the parameters of the boundary layer, energy loss in the flow, and laminar-turbulent transition. Analysis of the results of previous studies showed that there is a need to select and justify a turbulent viscosity model for each type of research object. The task of modeling the flow near the propfan and in the inlet device of the power plant was performed using the ANSYS CFX software product, which allows using various standard mathematical models and tools for modeling turbulent flow. The object of research is an annular axial inlet device, in front of which there is a coaxial propfan with two rows of propellers: the first row has eight blades, the second - six. 7 types of models of turbulent viscosity, which most fully describe the phenomena in the flow around the propfan and the inlet device, have been investigated: k-ωmodel; SSТ (shear stress transport) SST Transitional №1 Fully turbulence; SST Transitional №2 Specified Intermittency; SST Transitional №3 Gamma model; SST Transitional №4 Gamma theta model; SST Transitional №5 Intermittency. The results of mathematical modeling of the flow near the propfan and in the inlet device at the corresponding operating mode of the turbopropfan engine using the selected models of turbulent viscosity, the total pressure value in front of and behind the inlet device was obtained to determine the total pressure recovery coefficient in it and the value of the propfan thrust. The value of the recovery factor of the total pressure in the inlet device and the propfan thrust are compared with the flight test data of the prototype. An analysis of the comparison of the values of the total pressure recovery factor in the inlet device and the propfan thrust showed that the use of the SST Transitional №4 Gamma theta model allows obtaining the value of the total pressure recovery factor in the inlet device and the propfan thrust that is closest to the flight test results.Олег Володимирович ЖорникІгор Федорович КравченкоМихайло Михайлович МітраховичОлеся Валеріїна ДенисюкNational Aerospace University «Kharkiv Aviation Institute»articleтурбогвинтовентиляторний двигунгвинтовентиляторвхідний пристрійсилова установкамодель турбулентної в’язкостіMotor vehicles. Aeronautics. AstronauticsTL1-4050ENRUUKАвіаційно-космічна техніка та технологія, Vol 0, Iss 4, Pp 35-39 (2021) |
| institution |
DOAJ |
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DOAJ |
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EN RU UK |
| topic |
турбогвинтовентиляторний двигун гвинтовентилятор вхідний пристрій силова установка модель турбулентної в’язкості Motor vehicles. Aeronautics. Astronautics TL1-4050 |
| spellingShingle |
турбогвинтовентиляторний двигун гвинтовентилятор вхідний пристрій силова установка модель турбулентної в’язкості Motor vehicles. Aeronautics. Astronautics TL1-4050 Олег Володимирович Жорник Ігор Федорович Кравченко Михайло Михайлович Мітрахович Олеся Валеріїна Денисюк Substantiation of a turbulent viscosity model for studying the characteristics of a coaxial propfan and input device of a gas turbine engine |
| description |
The issues of substantiation of the most rational, based on adequacy, model of turbulent viscosity for mathematical modeling of the flow near the propfan and in the inlet of the turbine-propeller engine are considered. It was found that at present there is no universal turbulence model for determining the parameters of the boundary layer, energy loss in the flow, and laminar-turbulent transition. Analysis of the results of previous studies showed that there is a need to select and justify a turbulent viscosity model for each type of research object. The task of modeling the flow near the propfan and in the inlet device of the power plant was performed using the ANSYS CFX software product, which allows using various standard mathematical models and tools for modeling turbulent flow. The object of research is an annular axial inlet device, in front of which there is a coaxial propfan with two rows of propellers: the first row has eight blades, the second - six. 7 types of models of turbulent viscosity, which most fully describe the phenomena in the flow around the propfan and the inlet device, have been investigated: k-ωmodel; SSТ (shear stress transport) SST Transitional №1 Fully turbulence; SST Transitional №2 Specified Intermittency; SST Transitional №3 Gamma model; SST Transitional №4 Gamma theta model; SST Transitional №5 Intermittency. The results of mathematical modeling of the flow near the propfan and in the inlet device at the corresponding operating mode of the turbopropfan engine using the selected models of turbulent viscosity, the total pressure value in front of and behind the inlet device was obtained to determine the total pressure recovery coefficient in it and the value of the propfan thrust. The value of the recovery factor of the total pressure in the inlet device and the propfan thrust are compared with the flight test data of the prototype. An analysis of the comparison of the values of the total pressure recovery factor in the inlet device and the propfan thrust showed that the use of the SST Transitional №4 Gamma theta model allows obtaining the value of the total pressure recovery factor in the inlet device and the propfan thrust that is closest to the flight test results. |
| format |
article |
| author |
Олег Володимирович Жорник Ігор Федорович Кравченко Михайло Михайлович Мітрахович Олеся Валеріїна Денисюк |
| author_facet |
Олег Володимирович Жорник Ігор Федорович Кравченко Михайло Михайлович Мітрахович Олеся Валеріїна Денисюк |
| author_sort |
Олег Володимирович Жорник |
| title |
Substantiation of a turbulent viscosity model for studying the characteristics of a coaxial propfan and input device of a gas turbine engine |
| title_short |
Substantiation of a turbulent viscosity model for studying the characteristics of a coaxial propfan and input device of a gas turbine engine |
| title_full |
Substantiation of a turbulent viscosity model for studying the characteristics of a coaxial propfan and input device of a gas turbine engine |
| title_fullStr |
Substantiation of a turbulent viscosity model for studying the characteristics of a coaxial propfan and input device of a gas turbine engine |
| title_full_unstemmed |
Substantiation of a turbulent viscosity model for studying the characteristics of a coaxial propfan and input device of a gas turbine engine |
| title_sort |
substantiation of a turbulent viscosity model for studying the characteristics of a coaxial propfan and input device of a gas turbine engine |
| publisher |
National Aerospace University «Kharkiv Aviation Institute» |
| publishDate |
2021 |
| url |
https://doaj.org/article/4273fb93ff1b49c3b146651207889f3f |
| work_keys_str_mv |
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