Investigation of heat transfer in high-capacity power transformers having modifications preventing explosions

Aksenov, Andrey A.; Zhluktov, Sergey V.; Kudimov, N. F.; Son, E. E.; Savitskii, D. V.; Tretiyakova, O.N.; Shishaeva, A. S.

doi:10.1134/s0040601514130023

Cited by 3 publications

(2 citation statements)

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“…By modern methods of analysis of thermal simulation modes include devices with different software systems (eg, Flow Vision) [3]. There are also other approaches: a simplified mathematical model [4], the method of heating circuits (thermal resistance) [5], thermal monitoring [6], the finite element method [7], the finite difference methods [8], taking into account natural convection [9] radiation, together with the heat sink in the stationary and the cyclic operating conditions [10,11].…”

Section: Methods Of Analysis Of Temperature Fields In the Presence Ofmentioning

confidence: 99%

Heat Mode Electronic Devices at Elevated External Temperatures

2016

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Section: Methods Of Analysis Of Temperature Fields In the Presence Ofmentioning

confidence: 99%

Heat Mode Electronic Devices at Elevated External Temperatures

2016

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“…Охват задач, решаемых FlowVision, достаточно широк. Это задачи внешней аэродинамики, внутренних течений, сильного взаимодействия жидкости и конструкций (совместно с прочностными кодами: Abaqus, Nastran, АПН WinMachine, Fidesys) [Aksenov et al, 2004;Aksenov, Iliine, Schelayev et al, 2007;Аксенов, Коньшин, 2006;Аксенов, Шишаева, 2010], движения контактных (свободных) границ между несмешивающимися жидкостями [Аксенов и др., 2006; Гарипов и др., 2008], задачи с химическими и ядерными реакциями [Пугач, 2014; Фирсов и др., 2014], с теплообменом [Евграфова и др., 2016; Аксенов и др., 2013; Aksenov et al, 2014], с излучением, абляцией, конденсацией [Timouchev et al, 2005], с неньютоновской реологией вязкой жидкости, задачи акустики вентиляторов [Timouchev et al, 2003;Timouchev et al, 2006], задачи движения газа в областях с крайне малыми зазорами [Aksenov et al, 2005;Aksenov et al, 2006], задачи движения жидкости и газа во вращающихся машинах (компрессорах, турбинах) [Жестков и др., 2015], задачи обтекания тел газом со сверхзвуковыми и гиперзвуковыми скоростями [Аксенов и др., 2011; Aksenov et al, 2015;Markova et al, 2016] и другие междисциплинарные задачи, включая задачи из области добычи полезных ископаемых [Лукьянова, Шмелев, 2006; Рафиков, Аллаяров, 2009]. Для получения результатов численного моделирования, адекватных реальности, особенно в такой сфере деятельности, как атомная промышленность, необходимы верификация и валидация программы.…”

Section: Introductionunclassified

FlowVision: Industrial computational fluid dynamics

Aksenov¹

2017

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The work submits new release of the FlowVision software designed for automation of engineering calculations in computational fluid dynamics: FlowVision 3.09.05. The FlowVision software is used for solving different industrial problems. Its popularity is based on the capability to solve complex non-tradition problems involving different physical processes. The paradigm of complete automation of labor-intensive and time-taking processes like grid generation makes FlowVision attractive for many engineers. FlowVision is completely developer-independent software. It includes an advanced graphical interface, the system for specifying a computational project as well as the system for flow visualization on planes, on curvilinear surfaces and in volume by means of different methods: plots, color contours, iso-lines, iso-surfaces, vector fields. Besides that, FlowVision provides tools for calculation of integral characteristics on surfaces and in volumetric regions. The software is based on the finite-volume approach to approximation of the partial differential equations describing fluid motion and accompanying physical processes. It provides explicit and implicit methods for time integration of these equations. The software includes automated generator of unstructured grid with capability of its local dynamic adaptation. The solver involves two-level parallelism which allows calculations on computers with distributed and shared memory (coexisting in the same hardware). FlowVision incorporates a wide spectrum of physical models: different turbulence models, models for mass transfer accounting for chemical reactions and radioactive decay, several combustion models, a dispersed phase model, an electro-hydrodynamic model, an original VOF model for tracking moving interfaces. It should be noted that turbulence can be simulated within URANS, LES, and ILES approaches. FlowVision simulates fluid motion with velocities corresponding to all possible flow regimes: from incompressible to hypersonic. This is achieved by using an original all-speed velocity-pressure split algorithm for integration of the Navier-Stokes equations. FlowVision enables solving multi-physic problems with use of different modeling tools. For instance, one can simulate multi-phase flows with use of the VOF method, flows past bodies moving across a stationary grid (within Euler approach), flows in rotary machines with use of the technology of sliding grid. Besides that, the software solves fluid-structure interaction problems using the technology of two-way coupling of FlowVision with finite-element codes. Two examples of solving challenging problems in the FlowVision software are demonstrated in the given article. The first one is splashdown of a spacecraft after deceleration by means of jet engines. This problem is characterized by presence of moving bodies and contact surface between the air and the water in the computational domain. The supersonic jets interact with the air-water interphase. The second problem is simulation of the work of a human heart with...

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