Mathematical investigation of pressure pulsations characteristics and natural acoustic frequencies in the gas-dynamic channel

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Mathematical investigation of pressure pulsations characteristics and natural acoustic frequencies in the gas-dynamic channel	982 KB	Adobe Acrobat PDF	Read	Download
DOI Доступ к ресурсу на сайте издателя			10.1088/1742-6596/1145/1/012036

Title: Mathematical investigation of pressure pulsations characteristics and natural acoustic frequencies in the gas-dynamic channel
Creator: Eremin, Ivan V.
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Kostyushin, Kirill V.
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Zhiltsov, Konstantin N.
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Tyryshkin, Ilya M.
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Glazunov, Anatoly A.
Date: 2019
DOI: 10.1088/1742-6596/1145/1/012036
Description: Paper presents a numerical simulation of the occurrence of flow instability and pressure self-oscillations for a complex configuration of the gas-dynamic tract in combustion chamber. Unsteady axisymmetric two-dimensional Navier-Stokes equations are used for mathematical modelling of compressible one-phase medium. To simulate turbulence, the k-ε and LES models were used. Fast Fourier Transform (FFT) determined the frequency spectrum of pressure pulsations in the combustion chamber. It is shown that in the case of a simple geometry of the free gas cavity in combustion chamber, both models of turbulence make it possible to determine the spectrum of the natural acoustic frequencies. Using the LES model in the case of complex geometry makes it possible to predict the hydrodynamic structure of a flow accurately. The flow, in this case, has an intensive vortex generation. Formation of small-scale vortex occurs in the near-wall regions and large eddies in the core of a flow. Frequency of large eddies formation can be combined with the natural acoustic frequencies of combustion chamber and can affect the amplitude of pressure pulsations

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collection(s): Физико-технический факультет | НИИ прикладной математики и механики
Identifier: смотреть в электронном каталоге НБ ТГУ
Type: статьи в журналах
Source: Journal of Physics: Conference Series. 2019. Vol. 1145. P. 012036 (1-9)
Language: eng

Created: 26-02-2020

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Физико-технический факультет Mathematical investigation of pressure pulsations characteristics and natural acoustic frequencies in the gas-dynamic channel