Studying the resistance to fire of wood under the different type of thermal impact while forest fires

Касымов, Д. П.; Agafontsev, M. V.; Perminov, Vladislav; Tarakanova, Veronika

doi:10.1117/12.2504454

Cited by 5 publications

(5 citation statements)

References 7 publications

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“…7), which subsequently led to the burning of chipboard over the surface. Previously in [18][19], the experiment was conducted on the ignition of wood samples from a pine construction board as a result of exposure to flaming and glowing firebrands of pine bark. The experimental technique is similar.…”

Section: Resultsmentioning

confidence: 99%

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Experimental characterization of firebrand ignition of some wood building materials

Tarakanova¹,

Касымов²,

Galtseva³

et al. 2020

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Paper presents investigation on behaviour of wood construction material samples (plywood, oriented strand board, chipboard) in laboratory conditions as a result of a heat flux effect from naturally occurring flaming and glowing firebrands. The data of comparing ignition delay time of pine wood and wood-based construction materials (plywood, oriented strand board, chipboard) depending on the size and quantity of firebrands, initial temperature of samples, as well as the presence of air flow in firebrands falling zone is obtained. Ignition probability and conditions of wood construction materials as a result of the thermal effect of flaming and glowing pine firebrands are also studied. The obtained data allowed one to judge that according to chosen experimental parameters, the ignition time decreased with increasing air flow, as well as with an increase in the size and number of particles. It was experimentally confirmed that particle size plays a significant role in igniting of building structure. If the characteristic particle size is less than a certain characteristic value, which can be defined as the ratio of its volume to the surface area in contact with wood, then ignition mode with an abrupt maximum of temperature near phase boundary is not appear.

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Section: Resultsmentioning

confidence: 99%

“…The optimal particle ignition time was preliminarily selected (Table 2), at which the particle smoldering phase was achieved [18][19]. Particle burner time depended on particle size and quantity.…”

Section: Methodsmentioning

confidence: 99%

Experimental characterization of firebrand ignition of some wood building materials

Tarakanova¹,

Касымов²,

Galtseva³

et al. 2020

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“…The laboratory setup was used to study the probability of ignition of wood building materials by burning and smoldering firebrands (Figure 2). The experimental procedure, as well as the main elements of the laboratory setup for dropping the firebrands are given in detail in [27,71]. The experimental setup included: a JADE J530SB infrared camera with an 2.5-2.7 micron optical filter that records the temperature in the range of 300-800 °C; a Canon HF R88 video camera for evaluating the ignition delay and the behavior of firebrands after falling onto the surface of the wood building material samples; an AND MX-50 humidity analyzer for controlling the humidity of the samples; an AND HL 100 laboratory scales for controlling the initial mass of firebrands and the mass of wood samples.…”

Section: Experimantal Proceduresmentioning

confidence: 99%

Modeling of Wood Surface Ignition by Wildland Firebrands

Матвиенко

Касымов

Loboda

et al. 2022

Fire

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The probability of structural ignition is dependent both on physical properties of materials and the fire exposure conditions. In this study, the effect of firebrand characteristics (i.e., firebrand size, number of firebrands) on wood ignition behavior was considered. Mathematical modeling and laboratory experiment were conducted to better understand the conditions of wood ignition by a single or group of firebrands with different geometry. This model considers the heat exchange between the firebrands, wood layer and the gas phase, moisture evaporation in the firebrands and the diffusion gases of water vapor in the pyrolysis zone. In order to test and verify the model, a series of experiments to determine probability and conditions for ignition of wood-based materials (plywood, oriented strand board, chipboard) caused by wildland firebrands (pine twigs with a diameter of 6–8 mm and a length of 40 ± 2 mm) were conducted. The experiments investigated the firebrand impact on the wood layer under different parameters, such as firebrand size and quantity, wind speed, and type of wood. The results of experiments showed that the increase in wind speed leads to the increase in probability of wood ignition. Based on the received results, it can be concluded that the ignition curve of wood samples by firebrands is nonlinear and depends on the wind speed and firebrand size as well as their quantity. At the same time, there is no ignition of wood samples in the range of wind speed of 0–1 m/s. The ignition of wood is possible with a decrease in the distance between the firebrands with a decrease in the firebrand length. This result agrees more closely with the model.

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“…The likelihood of smoldering combustion transitioning to flaming was also noted in the presence of high wind speeds. In their experimental studies, Salehizadeh [31] and Kasymov [107] noted that smoldering rate increased with wind speed and became more repeatable at higher wind speeds, while lower wind speeds exhibited more stochastic behavior, i.e., flaming ignition behavior was found to be more variable and the probability of flaming combustion was low, especially for high-density fuel substrates. Bilbao et al [38] studied the effects of wind speeds on smoldering and flaming ignition of pinewood exposed to different radiant heat fluxes.…”

Section: Effect Of Airflowmentioning

confidence: 99%

“…Kasymov et al [26,107,124] studied the ignition of solid wood samples by embers generated under laboratory conditions. To simulate the real wildfire scenario, the wood substrate was preheated up to a temperature of 220 o C, and wind flows of 1 m/s to 1.5 m/s were applied.…”

Section: Bench-scale Experimentsmentioning

confidence: 99%

Ignitibility of structural wood products exposed to embers during wildland fires :

Nazaré¹,

Leventon²,

Davis³

2021

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Ignitability of structural components due to ember accumulation is a common cause of structural fires in wildland urban interface (WUI) communities. To fire harden structures in WUI communities, it is important to quantitatively predict the ember ignitability of wooden substrates. To commence this effort, past studies have been compiled and analyzed to identify knowledge gaps. Key topics including ignition of structures in WUI fires, measurement of thermal response of solid wood products used in residential structures, controlling mechanisms in ignition and sustained smoldering of wood, measurement of ember properties, real-scale and bench-scale experiments on assessing ember ignitability of structural components, and surrogate ignition sources for assessing smoldering propensity of the wooden substrate have been reviewed. Existing test methods have also been reviewed in the light of common exposures seen WUI environment.

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Studying the resistance to fire of wood under the different type of thermal impact while forest fires

Cited by 5 publications

References 7 publications

Experimental characterization of firebrand ignition of some wood building materials

Experimental characterization of firebrand ignition of some wood building materials

Modeling of Wood Surface Ignition by Wildland Firebrands

Ignitibility of structural wood products exposed to embers during wildland fires :

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