Quiet-flow ludwieg tube for hypersonic transition research
AIAA Journal, vol.46, no.7, pp.1757-1763, 2008 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 46 Issue: 7
- Publication Date: 2008
- Doi Number: 10.2514/1.34640
- Journal Name: AIAA Journal
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Page Numbers: pp.1757-1763
- TED University Affiliated: No
Abstract
Nearly all hypersonic tunnels have turbulent nozzle-wall boundary layers that radiate acoustic noise, generating high freestream noise levels that are an order of magnitude above flight levels. A new Mach-6 quiet tunnel has been developed to provide quiet flow at high Reynolds number with low noise levels, comparable with flight. Laminar nozzle-wall boundary layers and the resulting quiet flow have now been achieved to high Reynolds numbers of 3.5 × 106/ft (11 × 106/m), after five years of shakedown. The Mach-6 quiet tunnel is the first operational hypersonic quiet tunnel with low operating costs and good optical access.