Modernization Program of the Transonic Windtunnel HST of NLR: Lessons from thePast, Prospects for the Future

摘要

The first part of the paper summarizes the experience built up during 35 years ofwind tunnel testing in the NLR High Speed Tunnel HST. More specifically the Reynolds number problem is discussed together with the need for higher accuracy and more detailed flow field information. The primary goals of the phase 1 modification of the HST, executed in 1992, have been partly derived from this experience: increased test section length, new model supports and modernized tunnel control systems to improve upon accuracy and productivity. Results from validation experiments demonstrate that the HST has retained or improved its good standard of quality.