NASA NTRS · 19770000416
Quiet wind tunnel
Abstract
Simple and inexpensive technique suppresses background noise generated by pores in wind tunnel wall lining and makes aerodynamic data more accurate and reliable. Porous walls are covered with wire-mesh screen. Screen offers smoother surface to airflow and damps vortexes and resonance caused by wall perforations; yet it provides enough open area for perforations to cancel shock waves generated by model.
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Howard, P. W., Schutzenhofer, L. A.. 1978-03-01. Quiet wind tunnel. https://ntrs.nasa.gov/citations/19770000416
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