Доступ предоставлен для: Guest
Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции
Heat Transfer Research
Импакт фактор: 1.199 5-летний Импакт фактор: 1.155 SJR: 0.267 SNIP: 0.503 CiteScore™: 1.4

ISSN Печать: 1064-2285
ISSN Онлайн: 2162-6561

Выпуски:
Том 51, 2020 Том 50, 2019 Том 49, 2018 Том 48, 2017 Том 47, 2016 Том 46, 2015 Том 45, 2014 Том 44, 2013 Том 43, 2012 Том 42, 2011 Том 41, 2010 Том 40, 2009 Том 39, 2008 Том 38, 2007 Том 37, 2006 Том 36, 2005 Том 35, 2004 Том 34, 2003 Том 33, 2002 Том 32, 2001 Том 31, 2000 Том 30, 1999 Том 29, 1998 Том 28, 1997

Heat Transfer Research

DOI: 10.1615/HeatTransRes.v37.i4.40
pages 321-348

Problems of Vortex Dynamics in the Thermal Physics of Power Plants

Olga Viktorovna Mitrofanova
National Research Nuclear University "Moscow Engineering PhysicsInstitute" (MEPhI), 31 Kashirskoe shosse, Moscow, 115409, Russia

Краткое описание

The first section gives examples of flows with the formation of determinate vortex structures characteristic of power-generating plants. An approach to the solution of collector problems for nuclear reactors of the type of fast-neutron and water-moderated water-cooled power reactors is proposed. It is shown that the efficiency of swirling-flow apparatuses strongly depends on the internal vortex structure and the possibility of purposefully changing this structure. The results of the experimental investigations on visualization of large-scale structures in vortex tubes (Ranque effect) performed in the last few years have been analyzed. The features of the jet flow past curvilinear surfaces and the conditions for the formation of the vortex structure of boundary layers have been considered. The features of the vortex formation on surfaces with positive (Coanda effect) and negative (Taylor-Görtler vortices) curvature are considered.
The second section considers the mechanism of whirl generation and the conditions for the formation and stability of determinate vortex structures. The questions of the fundamental properties of the vorticity, vortex boundaries, and the influence of viscosity are considered. Such notions as helicity, helical flow, α-effect that are key notions in developing physical models of vortex flows are considered.
The third section presents an overview of the traditional approaches and the new trends in the development of methods for mathematical modeling of complex vortex flows. Examples of using helical turbulence models for describing the process of development of large-scale vortex structures are given. The general concept of constructing mathematical models that has made it possible to develop practically important engineering methods for calculating the hydrodynamics and the heat exchange in circular channels and tubes with vortex generators of different geometries has been considered in more detail, which permits using these methods to optimize the geometry of swirlers.
In conclusion, as an illustration of the thesis on the possibility of developing more efficient power systems, the question of the role of vortex structures in providing the vital activity of living organisms has been considered.


Articles with similar content:

Conceptual Principles of Monitoring of Biodiversity and Bioresources of the Water Bodies of the Lower Danube
Hydrobiological Journal, Vol.48, 2012, issue 3
A. G. Vasenko , S. A. Afanasyev, V. D. Romanenko, A. V. Liashenko
Heat Transfer Enhancement in Twisted Boiling Flows
Heat Transfer Research, Vol.40, 2009, issue 7
Evgeny D. Fedorovich
Simulation of the turbulent flow over an array of flexible blades
TSFP DIGITAL LIBRARY ONLINE, Vol.10, 2017, issue
Jochen Frohlich, Richard Meller, Silvio Tschisgale
Biotechnological Researches in the Institute of Hydrobiology of National Academy of Sciences of Ukraine
Hydrobiological Journal, Vol.51, 2015, issue 4
Yu. G. Krot, V. D. Romanenko
VORTEX STRUCTURE IN A CYLINDRICAL CYCLONE
Proceedings of the 25th National and 3rd International ISHMT-ASTFE Heat and Mass Transfer Conference (IHMTC-2019), Vol.0, 2019, issue
Chandranath Banerjee, Swapnil Urankar, Sunil Sagar, Kaustav Chaudhury, Deepa Suresh