![]() Pressure distributions on the airframe are compared with experimental data and good agreement is found. As validation example, a well-studied single rotor airframe interaction case in forward flight is discussed. Trimming is performed in an automatic and robust fashion using an iterative method to account for the non-linear relation between blade pitch and rotor performance. Accurate aerodynamic predictions are possible only if the rotors operate at desired thrust and zero moment about the hub. The non-linear, aerodynamic interaction between the rotor wakes with each other and with other structural components is solved by coupling the VBM with the governing flow field equations computed by Fluent's Navier-Stokes solvers. The model allows for an unstructured mesh in the rotor disks yielding easy meshing of multiple rotor geometries in close proximity and convenient local mesh clustering. Thus the effects of the blades are accounted for without them being present in the computational mesh, giving the model its name "Virtual Blade Model" or VBM. This technique models the rotors implicitly through source terms in the momentum equations. 1 and Yang et al.2 has been implemented into the general purpose solver Fluent. ![]() A method for analyzing the mutual aerodynamic interaction between multiple rotors and airframes in the spirit of Zori et al.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |