Testing fireproof materials in a combustion chamber

Kulhavý, Petr; Martinec, Tomáš; Novák, Ondřej; Petrů, Michal; Srb, Pavel

doi:10.1051/epjconf/201714302058

Cited by 8 publications

(10 citation statements)

References 10 publications

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“…From the ordinary identifiable physical properties, which can be accurately determined experimentally it was in the fuel definition necessary to gone through the description of quantum chemical particles. At this moment, is due to the complexity of solved task necessary to rely on literature, which is based on empirically verified and tested data [1,5,10,11,12]. After a thorough study of this issue is using and adjusting of these parameters advisable to tweak the simulation nearer the experiment.…”

Section: Results and Discussion Of Numerical Simulationmentioning

confidence: 99%

“…Temperature distribution in the testing chamber near of sample was tested during measurement cycle. The temperature curve is prescribed with equation (1).…”

Section: Methodsmentioning

confidence: 99%

“…movable gate, blinds) have been tested. Their function is to create a thermal shield between place which should stay safe and cool even if they are affected by high temperature radiation and convection from a near heat sources at the other side [1] for a by declared standard given time.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Development of fire shutters based on numerical optimizations

et al. 2018

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This article deals with a prototype concept, real experiment and numerical simulation of a layered industrial fire shutter, based on some new insulating composite materials. The real fire shutter has been developed and optimized in laboratory and subsequently tested in the certified test room. A simulation of whole concept has been carried out as the non-premixed combustion process in the commercial final volume sw Pyrosim. Model of the combustion based on a stoichiometric defined mixture of gas and the tested layered samples showed good conformity with experimental results-i.e. thermal distribution inside and heat release rate that has gone through the sample.

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Section: Results and Discussion Of Numerical Simulationmentioning

confidence: 99%

“…Temperature distribution in the testing chamber near of sample was tested during measurement cycle. The temperature curve is prescribed with equation (1).…”

Section: Methodsmentioning

confidence: 99%

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Development of fire shutters based on numerical optimizations

et al. 2018

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“…e gypsum plaster is suitable for antibacterial environments because the smoothness of its surface prevents dust from settling on. At high temperatures, gypsum is released by water vapor, which is often used to increase re resistance [31]. e cement plaster [32] exceeds especially with the high strength, resistance to mechanical damage, and very good adhesion to the basic substrate.…”

Section: Plastermentioning

confidence: 99%

Improving Electromagnetic Shielding Ability of Plaster‐Based Composites by Addition of Carbon Fibers

Samkova

Kulhavý

Tunáková

et al. 2018

Advances in Materials Science and Engineering

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e size of electromagnetic shielding in plaster composites by the means of different volume fractions of carbon fibers was studied in this paper. Conventional types of plaster, which are commonly used in industry, that is, cement, lime, gypsum, and lime cement ( ermo UM), were the base materials of the created composites. e fundamental idea of improving the electromagnetic shielding properties was verified based on a numerical simulation conducted by means of electromagnetic module in Comsol Multiphysics. e carbon microfibers with the above-critical length of 8 mm were added as the reinforcing and simultaneously shielding element into the plaster samples. From the viewpoint of the mechanical properties, fibers shorter than the critical length do not provide sufficient reinforcement. e samples were created at three different volume fractions of the dispersion and one without any reinforcement for the possibilities of their mutual comparison. e results of the carried measurement show that the electromagnetic shielding in the plaster composite grows with the increase of fiber content within the tested ratio proportionately. Also, the dependency of shielding ability on the inner material moisture has been studied. Any measureable influence of the moisture content on to the total shielding effect has not been found. Only in the lime plaster reinforced with fibers, the increased moisture could significantly decrease the shielding effect.

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“…Gypsum plaster is suitable for antibacterial environment because its smooth surface prevents dust from settling on it. At high temperatures, water vapour is released by gypsum, which is typically used to increase re resistance [35]. e last plaster, which is referred to as cement plaster, is designed for highly loaded areas; it exhibits increased strength, water resistance, and adhesion to the base substrate, as well as frost and weather resistance.…”

Section: 2mentioning

confidence: 99%

Improvement of the Acoustic Attenuation of Plaster Composites by the Addition of Short‐Fibre Reinforcement

Kulhavý

Samkova

Petrů

et al. 2018

Advances in Materials Science and Engineering

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Noise attenuation is a key contemporary issue associated with the protection of human health. In this study, the possibilities of affecting acoustic properties of plaster composites by the addition of short-fibre reinforcement are described. e improvement of attenuation abilities was first verified using a simple numerical model with a pure plaster followed by using a reinforced plaster.e model results revealed a mutual correlation between the fibre ratio and dissipated acoustic energy. Hence, typical plasters used in the building industry (e.g., plaster, lime cement, and cement) are used as the base materials of the tested composites. e reinforcing dispersion in the form of short fibres (basalt and glass) with a defined length was selected after evidence from previously reported studies and after the comparison of some other fibres with respect to the trade-off between the rendered mechanical properties and cost. Transfer functions of the tested samples were measured using an impedance tube with two microphones, followed by the calculation of the total acoustic absorption. On the other hand, cement and plaster materials exhibited a low damping ability, and the absorption could be considerably increased by the addition of fibres, especially in the area around 1 kHz. In contrast, the UM plaster exhibited good damping properties even without the dispersion, and the addition of improper fibres such as glass ones possibly worsened the properties. e acoustic attenuation of the plaster composites can be improved by the appropriate combination of the base material and fibre dispersion. However, it is not possible to generalise this improvement for all possible combinations.

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Testing fireproof materials in a combustion chamber

Cited by 8 publications

References 10 publications

Development of fire shutters based on numerical optimizations

Development of fire shutters based on numerical optimizations

Improving Electromagnetic Shielding Ability of Plaster‐Based Composites by Addition of Carbon Fibers

Improvement of the Acoustic Attenuation of Plaster Composites by the Addition of Short‐Fibre Reinforcement

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