Belikov A. S., Shalomov V. A., Sharanova Yu. G., Ragimov S. Yu. Theoretical researches of phasicness of transformations in the wood-combustion wave

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Parent Category: Geo-Technical Mechanics, 2017

Category: Geo-Technical Mechanics, 2017, Issue 135

Geoteh. meh. 2017, 135, 180-189

THEORETICAL RESEARCHES OF PHASICNESS OF TRANSFORMATIONS IN THE WOOD-COMBUSTION WAVE
¹Belikov A. S., ¹Shalomov V. A., ¹Sharanova Yu. G., ²Ragimov S. Yu.
¹SHEI “PSACEA”, ²National University of Civil Protection of Ukraine

UDC 699.81:614.84:536.21

Abstract. Studies have shown that wooden support in the mine workings undergoes significant changes when fire occurs in it. At high-temperature heating in the mode of standard fire, when tс1(τ)=t0+345lg(8τ+1)>0 at τ>0, at the stage of the wood heating and drying, two zones are formed at the intersection of the structure, where heat-mass transfer processes run differently; boundary of phase transitions between these zones is mobile, and is determined by corresponding conditions of the process development. For the heat and moisture transfer, a boundary-value problem is formulated in partial derivatives, with known initial distribution of temperature and moisture, with the given extreme thermal conditions of a standard fire, hence, allowing to calculate fields of temperature and moisture up to the moment of the wood combustion. For practical assessment of fire resistance and control of combustion process, during the simulation, effective stages and conditions for the existence of a combustion wave were identified. Depending on the external conditions, leading stage, which determines the combustion rate and propagation of the combustion wave, may be conductive or subordinate. Analysis of three modes of the phasic combustion process (management, separation and merger) shows that rate of gasification in the control mode leads to intensive formation of the charred layer (condensed k-phase) with low thermal conductivity.
Keywords: burning, temperature, thermal stream, heat conductivity, chemical transformations, wood, fire.

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About the authors:

 Belikov Anatoliy Serafimovich, Doctor of Technical Sciences (D.Sc.), Professor, Head of the Department Safety of Vital Activity in the State Higher Education Institution «Pridneprovsk State Academy of Civil Engineering and Architecture» (SHEI «PSACEA»), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Shalomov Vladimir Anatolijovich, Candidate of Technical Sciences (Ph.D.), Associate Professor,
Associate Professor of the Department Safety of Vital Activity in the State Higher Education Institution «Pridneprovsk State Academy of Civil Engineering and Architecture» (Shei «PSACEA»), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Sharanova Julija Grigor'evna, Master of Science, Senior Teacher of the Department Safety of Vital Activity in the State Higher Education Institution «Pridneprovsk State Academy of Civil Engineering and Architecture» (SHEI «PSACEA»), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Ragimov Sergej Jusupovich, Candidate of Technical Sciences (Ph.D.), Associate Professor, Associate Professor of the Department of organization and technical providing wrecking in the National University of Civil Protection of Ukraine, Kharkov, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

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