Document Type : Special issue

Authors

1 Department of Chemical Engineering, Faculty of Petroleum and Chemical Engineering, Razi University, Kermanshah, Iran

2 CFD Research Division, Advanced Chemical Engineering Research Center, Razi University, Kermanshah, Iran

10.22034/ijche.2024.435315.1515

Abstract

This research presents the performance of bladeless wind turbines. It also familiarizes readers with the phenomenon of eddy current, which serves as the foundation for bladeless turbines. In this direction, these kinds of bladeless turbines have been designed, modeled, and simulated. Firstly, a two-dimensional vibrational movement of the cylinder with a natural frequency of 2 Hz was modeled at Re = 51000. Additionally, it was noted that the values of the displacement amplitude, and lift coefficient are in the 0.8, and 1-1.5 ranges, respectively. After that, using 2D simulation, the impacts of two different geometries, horizontal and vertical ellipsoids, on displacement amplitude are examined. Investigations were conducted on important factors such as lift coefficients and displacement amplitude, as well as the vortex flow pattern formed behind these shapes. It was discovered that the vertical ellipsoid shape had the maximum values for the height of the displacement amplitude, and lift coefficient. The most important factor influencing this type of geometry's performance was examined in the following, namely the dimensionless Reynolds number, which ranges from 15000 to 90000. It was determined that the intended geometry exhibits a larger displacement response as the Reynolds number increases.

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