NDLI: Low-Interference Wind Tunnel Measurement Technique for Pitch Damping Coefficients at Transonic and Low Supersonic Mach Numbers

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Low-Interference Wind Tunnel Measurement Technique for Pitch Damping Coefficients at Transonic and Low Supersonic Mach Numbers

Content Provider	MDPI
Author	Franzmann, Christian Leopold, Friedrich Mundt, Christian
Copyright Year	2022
Description	An experimental method for the determination of the pitch damping moment coefficient sum $Cmq+Cmα˙$ in a wind tunnel at transonic and low supersonic Mach numbers is developed. With support interference being a major issue for dynamic tests at these velocities, a minimum interference wire suspension approach is used. The motion of the wind tunnel model is restricted to a single-degree of freedom pitching oscillation through the geometry of the support system. A statistical evaluation procedure allows the simultaneous evaluation of multiple tests to increase confidence in the results. The influence of the wires as well as nonlinear effects are accounted for. The method is validated in an extensive test series at Mach numbers ranging from 0.6 to 2.0. Two reference missile models—the Basic Finner and the Army-Navy Spinner Rocket (ANSR)—are used. The results agree very well with CFD calculations throughout the transonic range. In comparison to free-flight tests the accuracy is significantly improved and result uncertainties are reduced by an order of magnitude.
Starting Page	51
e-ISSN	22264310
DOI	10.3390/aerospace9020051
Journal	Aerospace
Issue Number	2
Volume Number	9
Language	English
Publisher	MDPI
Publisher Date	2022-01-20
Access Restriction	Open
Subject Keyword	Aerospace Aerospace Engineering Dynamic Stability Transonic Wind Tunnel Testing Missile Aerodynamics Cfd
Content Type	Text
Resource Type	Article

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