Open AccessModeling of acoustic fields during gas flow around bodies
Author(s) -
Arif R. Bagapov,
Ruslan V. Zhalnin
Publication year - 2020
Publication title -
žurnal srednevolžskogo matematičeskogo obŝestva
Language(s) - English
Resource type - Journals
eISSN - 2587-7496
pISSN - 2079-6900
DOI - 10.15507/2079-6900.22.202003.333-351
Subject(s) - sound pressure , cascade , acoustics , flow (mathematics) , mechanics , momentum (technical analysis) , square (algebra) , field (mathematics) , flow visualization , physics , computer science , mathematics , geometry , engineering , finance , chemical engineering , pure mathematics , economics
The article describes the modeling of the acoustic field based on the analysis of pressure fluctuations. For this a model based on the laws of mass, energy and momentum is implemented in a two-dimensional setting. For the calculations, the HLLC scheme for solving the Rieman problem and the WENO scheme for reconstructing the gas-dynamic parameters on the faces between the cells are used. To simulate the acoustic field, a time-averaged characteristic was chosen - the overall sound pressure level (OASPL). The paper considers the acoustic field obtained when a gas flows around a single square body, a cascade of square bodies, a step and a cavity, an interpretation of the ongoing processes is given. The result of the study is the visualization and description of the phenomena that arise when a gas flow around bodies, as well as the study of the effect of removing the observation point on acoustic effects within the simulated area.