Numerical and Experimental Investigation of A Three-Axis Free Rotation Wind Tunnel Model

TL;DR

This paper presents a novel stereovision-based wind tunnel measurement method for accurately characterizing the aerodynamic coefficients of a 3-axis free rotation model, improving upon traditional free flight experiments.

Contribution

It introduces a new stereovision measurement technique for wind tunnel testing of free rotation models, validated against numerical results.

Findings

The stereovision method provides reliable aerodynamic coefficient data.

Comparison shows good agreement with numerical simulations.

Enhanced measurement accuracy over traditional free flight experiments.

Abstract

The current need of improving performance in terms of control and aerodynamic efficiency of ammunitions leads to the necessity of performing accurate flying geometry characterizations. Therefore, new investigation methods are developed in order to increase the aerodynamic knowledge. Free flight measurements experiments are the most common way to obtain dynamic aerodynamic coefficients. However, they do not always allow neither easy nor perfect measurements conditions. Currently ISL develops a stereovision method based wind-tunnel measurements methodology for investigation of a 3-axis free rotation model. This methods has been applied to the DREV-ISL reference model in order to compare coefficients obtained by this method with numerical results.