Hover Predictions for the S-76 Rotor with Tip Shape Variation using CREATE-AV Helios

摘要

Computational Fluid Dynamics validation of the S-76 model-scale rotor in hover is performed using the US Department of Defense Computational Research and Engineering Acquisition Tools and Environments - Air Vehicles (CREATE™-AV) Helios software. The effect of blade tip shape variation is studied for three tip shapes, rectangular, swept-tapered, and swept-tapered-anhedral. Additionally, the effect of tip Mach number is also studied for the swept-tapered tip. High-resolution, time-accurate, simulations are performed, and results including rotor performance, blade airloads, and wake vortex strength and position are presented and analyzed. The performance predictions are compared against the test measurements and good agreement is obtained.