| Autor: |
Mortimer, Patrick, Jacobellis, George |
| Předmět: |
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| Zdroj: |
ITEA Journal of Test & Evaluation; Mar2022, Vol. 43 Issue 1, p15-18, 4p |
| Abstrakt: |
This research project was conducted at the US Army Research Laboratory in Aberdeen, MD. There were two objectives of the project. The first was to investigate the nonlinear response of rotor inflow when subjected to time-varying changes in blade pitch. The second was to serve as a learning experience and improve knowledge in developing and executing computational fluid dynamics (CFD) simulations. Using the CFD software, Helios, the flow field around a coaxial, counterrotating rotor was simulated. Two test cases were created. A baseline case where the collective blade pitch for the upper and lower rotor was set and held constant throughout the simulation, and a dynamic test case where the upper rotor was subjected to a change in collective of Δθ0 = 3° over one rotor revolution. A Rotor Comprehensive Analysis System (RCAS) structural model was developed and coupled to the CFD model providing blade deflections for accurate rotor loads for both the baseline and dynamic test cases. Currently, both test cases have been simulated for a total of five rotor revolutions. The current results are inconclusive due to a few remaining issues in the RCAS model that are left as future work. The Helios simulations show the main aspects of the rotor flow field and highlight that the cases are running. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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