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59 Wind Tunnel Testing

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Wind tunnel testing remains a cornerstone of understanding the aerodynamics of flight vehicles. The wind tunnel provides a controlled flow environment in which aerodynamic forces, surface pressures, and velocity fields can be systematically measured on scaled wings, airplane models, propellers, and other propulsion systems. Traditional approaches rely on surface-based instrumentation, such as pressure taps and force balances. However, modern facilities increasingly incorporate off-surface diagnostics, like particle image velocimetry (PIV), to map velocity fields and capture complex, three-dimensional flow phenomena. These tools enable the measurement of unsteady and separated flows, support the validation of computational fluid dynamics (CFD) models, and provide deeper insight into complex aerodynamic behavior. Despite numerous advances in CFD, wind tunnels remain essential for design verification and flow analysis of all sorts of flight vehicles and their components.

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Introduction to Aerospace Flight Vehicles Copyright © 2022–2025 by J. Gordon Leishman is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License, except where otherwise noted.

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