A Conservative, Scalable, Space-Time Blade Element Rotor Model for Multi-Rotor VehiclesThe development of a parallel blade-element rotor model and its implementation into an adaptive Cartesian method is described. The unsteady version of the rotor model applies a body force to all cells contained in the swept space-time volume at each timestep and special care is taken to maintain axisymmetry on the Cartesian grid. Mesh convergence of rotor thrust and torque is obtained with around 10000 cells in the disk for the steady model. Parallelization is accomplished using OpenMP and the rotor force computation is distributed across all available nodes. Simulations of an isolated XV-15 rotor in hover show good correlation with experimental data and predictions of multi-rotor thrust variation closely match previous high fidelity simulations. The final paper will also include results from the unsteady rotor model and parallel scaling tests.
Document ID
20190028755
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Chiew, Jonathan (Stanford Univ. Stanford, CA, United States)
Aftosmis, Michael J. (NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 6, 2019
Publication Date
May 14, 2018
Subject Category
Aircraft Design, Testing And Performance
Report/Patent Number
ARC-E-DAA-TN45938
Meeting Information
Meeting: AHS Technical Conference on Aeromechanics Design for Transformative Vertical Flight