uCRM: undeflected Common Research Model
« Back
This Mendeley Data page contains the aerodynamic and structural geometries, meshes, and other data files for two open models for high-fidelity wing aerostructural studies:
- A flexible version of NASA’s Common Research Model configuration (uCRM-9)
- A higher aspect ratio version (uCRM-13.5) for very flexible wing design studies
A full explanation of how these models were developed can be found in this paper. If you use the model, please cite the paper.
The goal of these models is to provide a common benchmark for aerostructural analysis and design optimization of transonic flexible wing aircraft. These models were already used in various studies. The methods used in these optimizations were originally described in this paper. These methods have been applied to the optimization of a transonic transport aircraft and have been used in many other applications since.
The flight conditions are actual flight conditions and not the CRM wind tunnel conditions, so the Reynolds number differs. The conditions are:
- M = 0.85
- CL = 0.5
- Altitude = 37,000 ft
- uCRM-9: Re = 43,130,072 (Re length 7.01 m)
- uCRM-13.5: Re = 35,524,500 (Re length 5.77 m)
The files include:
- Geometry files for the wing-body-htail configuration of each aircraft (IGES/TIN)
- Aerodynamic mesh files for the wing-body-htail configuration of each aircraft, both in multi-block and overset format (CGNS)
- Structural mesh files for the aluminum wingbox structure including material properties based on a smeared stiffness blade-stiffened panel approach, external control surface and engine masses, and aerodynamic loads for nominal cruise (BDF)
- Reference solutions using the MACH framework and NASTRAN
All units are in SI (kg/m/s)