Development of NASA 2.7% Semispan and Full Span High Lift Common Research Models (CRM-HL)

Both the 2.7%-scale semispan and full span High Lift Common Research Model (CRM-HL) were developed to support extensive experimental investigations in cryogenic facilities exploring Reynolds number trends, tunnel wall effects, and additively manufactured test articles. The 2.7%-scale CRM-HL was designed, analyzed, and fabricated as a tool to validate Computational Fluid Dynamics (CFD) code in alignment with High Lift Prediction Workshop (HLPW) objectives. The NASA 2.7%-scale CRM-HL semispan and full span models are part of the CRM-HL ecosystem of models built and tested around the world. These models are based on the same generic commercial high lift design, built at different scales, both semispan and full span, each designed to be tested in multiple configurations with the modular ability to test different part designs. The 2.7%-scale wind tunnel models were designed with modular components that enable its testing in several configurations, including takeoff and landing, as well as with and without the nacelle-pylon and landing gear. The same modular left hand wing supports testing of both the semispan and full span fuselages. The 2.7%-scale CRM-HL contains static and dynamic instrumentation. The test articles described herein will be tested in the NASA Langley Research Center (LaRC) National Transonic Facility (NTF) and will continue to be tested in other wind tunnels, such as the European Transonic Wind-tunnel (ETW), as deemed appropriate by the research community.