The efficiency of wind energy production on a relatively small scale can be enhanced without relying on conventional turbine blades. Promising designs for bladeless wind turbines (BWTs) were identified in a computer-based analysis conducted by researchers from the University of Glasgow, Scotland.

BWTs generate power through vortex-induced vibration and can reduce bird fatalities, maintenance needs, noise levels and land requirements. Lacking rotating blades, BWTs form cylindrical masts that sway when exposed to wind currents. Wind movement generates vortices, which then make the whole structure oscillate. When this swaying motion perfectly matches the structure’s natural vibration frequency, the movement amplifies dramatically, and the increased motion is then converted directly into electricity.

Computer simulations provide insights into how mast dimensions influence both the amount of power generated and the structural integrity of BWTs. The findings are particularly important for ensuring structural safety in winds ranging from 20 miles per hour to 70 miles per hour. The analysis published in Renewable Energy identifies an ideal design formed with an 80 cm mast that is 65 cm in diameter.

Such a structure could safely deliver a maximum of 460 W, which renders it far superior to real-world prototypes which to date generate a maximum of 100 W. This design methodology shows promise for scaling up BWTs to utility-grade systems generating 1 kW and beyond, making them much more practical for use by renewable energy providers.