Design and Verification of a Multi‐Feature Wind Field Generation Device Based on Array‐Type Rotors

ABSTRACT To address the limitations of existing wind testing equipment and enable realistic airflow simulation for unmanned aerial vehicle (UAV) flights, a novel rotor‐based wind wall system was developed. This system accurately replicates complex aerodynamic environments, allowing for precise, controlled indoor testing of UAV performance and aerodynamic behavior. It provides a reliable and versatile platform for UAV research under realistic yet reproducible conditions. The rotor array design was validated using computational fluid dynamics (CFD) simulations in ANSYS Fluent, employing the finite volume method under representative operating conditions. Results showed that beyond 0.4 m from the wall, the wind field achieved high uniformity, with deviations in the velocity streamlines normal to the plane below 0.01 m. Both uniform and non‐uniform wind profiles were attainable by adjusting the distance from the wall, without compromising adjacent airflow stability, confirming the design's effectiveness in generating controllable and stable airflow. Wind speed accuracy was evaluated by comparing simulation outputs with actual data from UAV flights. The system demonstrated a maximum error of less than 0.5 m/s and a mean error of 0.147 m/s, indicating strong agreement with real‐world conditions. These results validate the device's high accuracy and reliability in simulating realistic wind fields. The rotor‐based wind wall represents a significant advancement in indoor aerodynamic testing, enabling the detailed investigation of UAV performance across diverse wind conditions. Its precise control, stability, and fidelity make it a valuable tool for advancing UAV design, control algorithms, and flight testing methodologies in a safe and repeatable environment.