Parametric Study of a Bladeless Fan Geometry: Investigating the Influence of Geometry Parameters on Discharge Ratio and Thrust Force

TL;DR

This study conducts a detailed parametric analysis of a bladeless fan design, examining how geometry parameters like radius, flow rate, and slit nozzle thickness affect discharge ratio and thrust, to inform better design optimization.

Contribution

It provides new insights into how geometric parameters influence performance metrics of bladeless fans, aiding in their design and optimization.

Findings

Discharge ratio varies significantly with radius and flow rate.

Thicker slit nozzles increase thrust force.

Optimal parameters depend on desired airflow and force characteristics.

Abstract

The innovative bladeless design of the AirMultiplier, patented by Dyson in 2009, has generated significant interest due to its unique approach to air circulation that leverages the Coanda effect. In this study, we present a comprehensive parametric analysis of a simplified bladeless fan geometry, with a specific focus on the discharge ratio and generated thrust force for small to medium radii (5 to 200mm) and a range of flow rates spanning from 1 to 100g/s. In addition to the radii and mass flow rates, this study also addresses the effect of the slit nozzle thickness on the discharge ratio and thrust force of the AirMultiplier. By exploring the influence of this additional parameter, we aim to provide a more complete understanding of the performance characteristics of the geometry and to offer insights that could inform the design and optimization of similar bladeless geometries.