Дослідження горіння мерехтливих піротехнічних виробів

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dc.contributor.authorПоджарський, М. А.
dc.contributor.authorЯрликова, В. О.
dc.date.accessioned2023-03-07T10:44:13Z
dc.date.available2023-03-07T10:44:13Z
dc.date.issued2020
dc.description.abstractenThe process of combustion of flickering pyrotechnic products containing metallic and non-metallic fuel was investigated. A research method based on the comparison of experimental and calculated data is proposed, which allows the creation of flickering pyrotechnic products with a given duration of the interval between flashes. Flickering pyrotechnic products, the burning of which is accompanied by a series of bright flashes, are used in the technique of fireworks to create original light paintings. According to the known works, the range of characteristics of such products is quite wide. In particular, the duration of the interval between flashes may range from hundredths of a second to several seconds. However, in literature there are no details of the reasons pulsating nature of combustion and quantitative characteristics of the processes that occur at the same time. Due to the lack of a theoretical base, pyrotechnic product developers have to go empirically, relying only on experimental experience. An unresolved scientific problem is the lack of a theoretical approach to the development of flickering pyrotechnic articles with a given duration of the interval between flashes. The purpose of the article is to obtain data on the quantitative characteristics of the processes occurring during the burning of flickering pyrotechnic articles, and to develop a methodology that will allow to create products whose combustion parameters - primarily the duration of the interval between flashes - would be predictable in advance. The pulsating character of the combustion is a consequence of the parallel course of processes having different time scales. There are at least two types of such processes: fast exothermic combustion reactions and slow heat loss to the environment. The speed of the latter, among other things, depends on the size of the heat transfer surface, which is determined by the diameter of the product, if it has the shape of a body of rotation. By varying the diameter obviously can affect the rate of heat transfer, and with it the nature of combustion. From this assumption follows the task of this study - to investigate the burning of flickering products of cylindrical shape, which differ only in diameter. The results were obtained by comparing experimental data on the duration of the interval between flashes with the data obtained in the calculated way. The temporal characteristics of the combustion of the samples were determined using a storage oscilloscope, to which a photocell was connected. The interval between flashes was determined by the screen scale as the distance between the peaks of the waveform. According to our observations, the following occurs in the process of sample burning. During ignition, non-metallic fuel - sulfur, is first lit. It lights up easily but burns slowly, warming the composition of the site to the ignition temperature of the metal fuel. The latter lights up harder but burns quickly with a flash. The sharp flash of metallic fuel is accompanied by spreading hot combustion products, because they are unable to ignite the next batch of metal. However, the sulfur continues to burn, so the cycle repeats. The duration of the interval between flashes is determined by the heating time of the sample portion of the burning sulfur to the ignition temperature of the metallic fuel. The study confirmed the assumption that to change the duration of the interval between flashes of flashing pyrotechnic products within certain limits, it is enough to change their diameter.uk
dc.description.abstractukДосліджено процес горіння мерехтливих піротехнічних виробів, які містять металеве та неметалеве пальне. Запропоновано методику дослідження засновану на порівнянні експериментальних та розрахункових даних, яка дозволяє створювати мерехтливі піротехнічні вироби з заданою тривалістю інтервалу між спалахами.uk
dc.format.pagerangeС. 17-21uk
dc.identifier.citationПоджарський, М. А. Дослідження горіння мерехтливих піротехнічних виробів / Поджарський М. А., Ярликова В. О. // Вісник НТУУ «КПІ ім. Ігоря Сікорського». Серія «Хімічна інженерія, екологія та ресурсозбереження». – 2020. – № 1 (19). – С. 17-21. – Бібліогр.: 8 назв.uk
dc.identifier.doihttps://doi.org/10.20535/2617-9741.1.2020.207803
dc.identifier.urihttps://ela.kpi.ua/handle/123456789/53411
dc.language.isoukuk
dc.publisherКПІ ім. Ігоря Сікорськогоuk
dc.publisher.placeКиївuk
dc.sourceВісник НТУУ «КПІ ім. Ігоря Сікорського». Серія «Хімічна інженерія, екологія та ресурсозбереження»: збірник наукових праць, 2020, № 1 (19)uk
dc.subjectмерехтливий піротехнічний вирібuk
dc.subjectгорінняuk
dc.subjectфеєрверкuk
dc.subjectтепловий балансuk
dc.subjectflickering pyrotechnic productuk
dc.subjectburninguk
dc.subjectfireworksuk
dc.subjectheat balanceuk
dc.subject.udc662.113.3:66.011uk
dc.titleДослідження горіння мерехтливих піротехнічних виробівuk
dc.typeArticleuk

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Вісник НТУУ «КПІ ім. Ігоря Сікорського». Серія «Хімічна інженерія, екологія та ресурсозбереження»: збірник наукових праць, № 1 (19)