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Математическое моделирование тепломассопереноса при воспламенении торфа

Математическое моделирование тепломассопереноса при воспламенении торфа

Abstract

Исследуется влияние тепломассопереноса на воспламенение торфа локальным внешним источником тепла цилиндрической формы. Приведена математическая модель рассматриваемого явления. На основании численных расчетов определена минимальная энергия источника заданных размеров, воспламеняющего торф при разных значениях влагосодержания и условий теплообмена источника с окружающей средой. Найдены зависимости времени прогрева от величины среднего теплового потока и влагосодержания торфа, а также критические их значения, при которых зажигание и распространение торфяного пожара не происходит. Показаны результаты экспериментальных исследований, проведенных в лабораторных условиях при разных значениях исследуемых параметров. При сравнении результатов математического моделирования с экспериментальными данными получено согласование по начальной температуре источника и времени прогрева, в результате чего можно заключить, что рассмотренная математическая модель тепломассопереноса в торфяном пласте с достаточной для практики точностью описывает процессы зажигания и горения торфа.

The authors have studied the influence of heat and mass transfer on peat ignition with a local external heat source of cylindrical shape. The paper introduces the mathematical model of this phenomenon. Based on numerical calculations the minimum energy of a specified dimension source was determined. The source inflames peat at different moisture values and conditions of source heat exchange with the environment. The authors found out the dependences of warm-up time on average heat flow value and peat moisture content as well as their critical values at which the ignition and peat fire spread do not occur. The paper introduces the results of laboratory experiments at different values of the studied parameters. When comparing the results of mathematical modeling and the experimental data the authors obtained the matching in source initial temperature and heating time; one can conclude that the studied mathematical model of heat and mass transfer in peat formation describes peat ignition and burning with accuracy sufficient for practice.

Keywords

ТЕПЛОМАССООБМЕН, ТОРФ, МИНИМАЛЬНАЯ ЭНЕРГИЯ ВОСПЛАМЕНЕНИЯ, ИСТОЧНИК ТЕПЛА, ВЛАГОСОДЕРЖАНИЕ

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average