Aerodynamic Performance and Comparative Analysis of Bladeless Fan Technology for Commercial and Aerospace Applications

Abstract

The research explores the application of bladeless fan technology in commercial and aerospace industry, starting with its optimization in a constrained environment as a bladeless ceiling fan. The study utilizes One Factor at a Time (OFAT) methodology and Design of Experiment (DOE) techniques to optimize geometric parameters of bladeless ceiling fan for enhanced air delivery, expanded comfort zones, and significantly lower power consumption compared to traditional ceiling fans. The perceived comfort level for each factor was estimated in accordance with American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) standard ASHRAE-55. It was concluded that a finer jet width and/or bigger radii with the jet orientated vertically down increases velocity spread, thus increasing the comfort zone. Circular profiles were found more efficient than airfoil shapes, with optimized parameters (1.4 m fan diameter, 0.00255 m jet width, 91.21o orientation angle, and 3.0 m/s of jet velocity) enhancing air delivery by 60%, extending the comfort zone by 76%, and reducing power consumption by 43%. Building on this, the research investigates the potential of bladeless fans in aerospace applications. At present, the application of bladeless fans in aerospace industry is almost negligible with no real-world application based on bladeless fan exists. Evaluation of annular and semi-annular bladeless fans (fanjets) indicates their potential in modifying aircraft wing aerodynamics. The leading edge (LE) location for fanjet was more effective than trailing edge (TE). Similarly, spanwise distribution of fanjet on aircraft wing produces higher Lift to Drag (L/D) ratios. Simulations and wind tunnel tests demonstrate that a triple-fanjet configuration is particularly effective, achieving higher lift values and improved L/D ratios compared to single or dual fanjet configurations. Wind tunnel tests on a modified propeller Unmanned Arial Vehicle (UAV) further validate the technology's potential, suggesting that bladeless fan integration could be transformative not only in commercial settings but also in the aerospace industry, leading to substantial improvements in overall system efficiencies.