Study of thermoacoustic behavior of functionally graded ceramic cylindrical shell reinforced with carbon nanotubes in thermal environment

Articles in Press

Document Type : Research Paper

Authors

1 School of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran

2 Satellite technologies .School of advanced technologies. Iran University of Science and Technology

3 Ph.D Student, School of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran

4 School of advanced technologies Iran University of Science and Technology

Abstract

In this paper, the thermoacoustic behavior of a functionally graded cylindrical shell reinforced with carbon nanotubes in the presence of a temperature gradient is investigated. The structure is submerged in an external flow and is excited by an oblique sound wave. The shell is made of ceramic material, and the carbon nanotubes are distributed in a graded form in the thickness direction. The effective properties of the constituents are also assumed to be temperature-dependent. Hamilton's principle and third-order shear deformation theory are used to derive the dynamic equations of shell motion. Then, using the interactions of fluid and structure, the acoustic equations of the shell are determined. Finally, the effect of physical and environmental parameters on the sound transmission of the shell is investigated. According to the results, the effect of carbon nanotube distribution on sound transmission is more significant at high frequencies, and increasing the temperature due to reducing the stiffness of the structure decreases the sound transmission loss.

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Aerospace Knowledge and Technology Journal

Articles in Press, Accepted Manuscript
Available Online from 28 April 2023

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