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Stationary Gas Dynamics and Heat Transfer of Turbulent Flows in Straight Pipes at Different Turbulence Intensity

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Заглавие Stationary Gas Dynamics and Heat Transfer of Turbulent Flows in Straight Pipes at Different Turbulence Intensity
 
Автор Plotnikov, L.
Grigoriev, N.
Osipov, L.
Slednev, V.
Shurupov, V.
 
Тематика AERODYNAMICS
HEAT ENGINES
HEAT TRANSFER
LONG TUBE
TRANSVERSE PROFILING
TURBULENCE INTENSITY
AIR
ANEMOMETERS
ENVIRONMENTAL MANAGEMENT
GAS PLANTS
HEAT EXCHANGERS
HEAT TRANSFER
THERMOCOUPLES
TURBULENCE
AIR FLOW
ENVIRONMENTAL PERFORMANCE
EXCHANGE BEHAVIOR
HEAT-EXCHANGE
LOCAL HEAT TRANSFER
LONG TUBES
STRAIGHT PIPE
TECHNICAL EQUIPMENTS
TRANSVERSE PROFILING
TURBULENCE INTENSITY
GAS DYNAMICS
 
Описание The gas-dynamic and heat-exchange behaviours of air flows in gas-dynamic systems have a significant impact on the efficiency and environmental performance of most technical equipment (heat engines, power plants, heat exchangers, etc.). Therefore, it is a relevant task to obtain reliable experimental data and physical laws on the influence of cross-sectional shape and initial turbulence intensity on gas dynamics and the level of heat transfer. In this study, data were experimentally obtained on the instantaneous values of the local velocity and local heat transfer coefficients of stationary air flows in straight pipes with circular, square, and triangular cross-sections at different initial values of the turbulence intensity. The measurements were carried out with a constant temperature hot-wire anemometer, thermocouples, and pressure sensors. Based on the research results, data on the turbulence intensity and averaged local heat transfer along the length of pipes with different cross-sections were summarised. It has been established that turbulence intensity in a square pipe is up to 40% higher than in a round channel; in a triangular channel, on the contrary, it is up to 28% lower. After the air flow’s initial turbulence, the relaxation of the flow in square and triangular pipes occurs faster than in a round channel. It is found that the initial intensity of turbulence leads to an increase in the averaged local heat transfer, which is typical of all investigated pipe configurations and initial conditions. © 2022 by the authors.
Ministry of Education and Science of the Russian Federation, Minobrnauka
The research funding from the Ministry of Science and Higher Education of the Russian Federation (Ural Federal University Program of Development within the Priority-2030 Program) is gratefully acknowledged.
 
Дата 2024-04-08T11:05:33Z
2024-04-08T11:05:33Z
2022
 
Тип Article
Journal article (info:eu-repo/semantics/article)
Published version (info:eu-repo/semantics/publishedVersion)
 
Идентификатор Plotnikov, L, Grigoriev, N, Osipov, L, Slednev, V & Shurupov, V 2022, 'Stationary Gas Dynamics and Heat Transfer of Turbulent Flows in Straight Pipes at Different Turbulence Intensity', Energies, Том. 15, № 19, 7250. https://doi.org/10.3390/en15197250
Plotnikov, L., Grigoriev, N., Osipov, L., Slednev, V., & Shurupov, V. (2022). Stationary Gas Dynamics and Heat Transfer of Turbulent Flows in Straight Pipes at Different Turbulence Intensity. Energies, 15(19), [7250]. https://doi.org/10.3390/en15197250
1996-1073
Final
All Open Access; Gold Open Access
https://www.mdpi.com/1996-1073/15/19/7250/pdf?version=1665214927
https://www.mdpi.com/1996-1073/15/19/7250/pdf?version=1665214927
http://elar.urfu.ru/handle/10995/131172
10.3390/en15197250
85139954799
000866781400001
 
Язык en
 
Права Open access (info:eu-repo/semantics/openAccess)
cc-by
https://creativecommons.org/licenses/by/4.0/
 
Формат application/pdf
 
Издатель MDPI
 
Источник Energies
Energies