title: Ð­ÐºÑÐ¿ÐµÑÐ¸Ð¼ÐµÐ½ÑÐ°Ð»ÑÐ½Ð¾Ðµ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð»Ð°Ð¼Ð¸Ð½Ð°ÑÐ½Ð¾-ÑÑÑÐ±ÑÐ»ÐµÐ½ÑÐ½Ð¾Ð³Ð¾ Ð¿ÐµÑÐµÑ Ð¾Ð´Ð° Ð² ÑÐ²Ð¾Ð±Ð¾Ð´Ð½Ð¾ÐºÐ¾Ð½Ð²ÐµÐºÑÐ¸Ð²Ð½Ð¾Ð¼ ÑÐ»Ð¾Ðµ Ð½Ð° Ð²ÐµÑÑÐ¸ÐºÐ°Ð»ÑÐ½Ð¾Ð¹ Ð¿Ð»Ð°ÑÑÐ¸Ð½Ðµ Ñ ÐºÑÑÐ¿Ð½Ð¾Ð¼Ð°ÑÑÑÐ°Ð±Ð½ÑÐ¼Ð¸ Ð²Ð¾Ð·Ð¼ÑÑÐµÐ½Ð¸ÑÐ¼Ð¸
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
title: Experimental investigation of laminar-turbulent transition in a free-convection layer on vertical plate with large-scale obstacles
Creators: name: ÐÐ°Ð»ÑÑ, ÐÐ½Ð°ÑÑÐ°ÑÐ¸Ñ
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2020
Subjects: ÑÐ²Ð¾Ð±Ð¾Ð´Ð½Ð¾ ÐºÐ¾Ð½Ð²ÐµÐºÑÐ¸Ð²Ð½Ð¾Ðµ ÑÐµÑÐµÐ½Ð¸Ðµ
Ð»Ð°Ð¼Ð¸Ð½Ð°ÑÐ½Ð¾-ÑÑÑÐ±ÑÐ»ÐµÐ½ÑÐ½ÑÐ¹ Ð¿ÐµÑÐµÑ Ð¾Ð´
ÑÐºÑÐ¿ÐµÑÐ¸Ð¼ÐµÐ½ÑÐ°Ð»ÑÐ½Ð¾Ðµ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ
Ð¿ÑÐ»ÑÑÐ°ÑÐ¸Ð¾Ð½Ð½ÑÐµ Ñ Ð°ÑÐ°ÐºÑÐµÑÐ¸ÑÑÐ¸ÐºÐ¸
free-convection flow
laminarâturbulent transition
experimental research
pulsation characteristics

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description: The subject of the graduate qualification work is Â«Experimental investigation of laminar-turbulent transition in a free-convection layer on vertical plate with large-scale obstaclesÂ».
The given work is devoted to studying free-convection motion along a vertical plate, zone of laminar-turbulent transition as well as defining the border this area. Main goal this research is control transitional process by affecting on the flow various large-scale obstacles in the laminar area.
The research set the following tasks:
1. Measurement and obtaining mean and pulsation characteristics temperature and streamwise velocity on the experimental apparatus.
2. Study of the features and structure of a free-convection flow and a laminar-turbulent transition in natural conditions in the absence of large-scale obstacles to the flow path.
3. Comparative analysis of the influence of large-scale obstacles on changes in the structure of the free-convective boundary layer and flow characteristics.
The work was performed on experimental equipment that allows simulate three flow regimes: laminar, transient and turbulent. The main part is a heated vertical plate made of aluminum sheet 90cm wide and 4.95 m high. One of the sides is polished and serves as a working surface along which a free-convective flow is formed. These research were carried in the mode of isothermal surface at a temperature of 60 Ð¡, the air temperature at outer boundary of the boundary layer is equal to 24-25 Ð¡ .
As a result, were obtained data on profile characteristics flow, as well as the pulsation characteristics of temperature and streamwise velocity for three cases: without obstacles in the flow path, with obstacles in the form of a rectangle and a trapezoid.
Comparative analysis of the influence of large-scale obstacles on changes the characteristics and boundaries of the laminar-turbulent transition was carried. Analysis of the results showed that the introduction of an artificial obstacle to the flow leads to significant changes in the structure of the free-convective boundary layer