Design, Study, and Comparison of a New Axial Fan Using the Fibonacci Spiral and a Classic Axial Fan

Abstract

This study aims to compare two small-sized axial fans: one is the classic axial fan (referred to as "Model A") and the other is an innovative design using the natural pattern of the Fibonacci spiral (referred to as "Model B"), which is found in natural phenomena such as hurricanes, nautilus shells, galaxies, and more. The comparison process is carried out using the Solidworks Flow Simulation tool, generating torque, flow, speed, noise level, and pressure graphs through parametric simulations.The study arises from the growing need for efficient, quiet, and low-energy cooling to dissipate heat generated by electronic components. The methodology follows a logical and proprietary sequence, broken down into three design phases. In Phase 1, models are developed following the Fibonacci spiral constraint and simulated at 2000 RPM to maximize fluid flow. Phase 2 focuses on optimizing speed and flow by varying the angle of attack, the number of blades, and their length. Finally, Phase 3 presents the final model, with dimensions similar to the classic design but featuring stratified and curved blades, and a thickness of 0.5 mm to improve flow.The most notable results reveal that the new design exhibits low levels of torque, flow, and noise. For example, at speeds greater than 3500 RPM, Model B shows an average noise reduction of 3.4%. Under the same torque consumption conditions, Model B rotates at 6000 RPM and Model A rotates at 3300 RPM; under these conditions, flow gains of up to 28.81% can be achieved. Under the same total pressure conditions, the maximum flow gain can reach 41%.