Abstract
The flow around a plate is a classic problem in fluid dynamics, with applications in fields such as aerospace, construction, energy, and chemical engineering. This paper studies the flow around a plate in a circular tube. The detached-eddy simulation method is used to calculate the unsteady flow near the plate, allowing the mechanical and wake flow characteristics of the plate to be analyzed at different open angles and the influence of the plate dome degree to be further investigated. The variation laws of the plate torque and pressure under the unsteady flow inside the circular tube are obtained. By comparing and analyzing the time-averaged velocity and instantaneous velocity fluctuations of the wake flow on the plate, the flow field distribution patterns under different structures and open angles are identified, and the unstable region of the wake flow is determined. The results presented in this paper provide a theoretical reference for applications involving the flow around a plate.
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