Coupled CFD/CSD predictions of semi-span XV-15

Ethan Corle, Sven Schmitz, Matt Floros

Research output: Contribution to conferencePaper

4 Scopus citations

Abstract

This work focuses on a number of aspects which are progress toward the goal of tightly coupled CFD/CSD analysis for whirl-flutter prediction. First, the Rotorcraft Comprehensive Analysis System (RCAS) analysis is used to carry out traditional linear stability analysis. Next, a method of using trim springs to artificially increase the stability of the model during the RCAS trim procedure is presented. Finally, this method is used to complete time integrated transient analysis to identify the dominant modes and associated damping at a sweep of wind speeds. Differences between linear stability analysis and time domain analysis are presented. Finally, new capabilities introduced to the CREATEAV software Helios are used to present a first fully-elastic semi-span model of the XV-15 using the high-fidelity aerodynamics in Helios coupled to RCAS. Baseline loose coupled results are given. A focus is placed on developing modeling procedures which will allow for CFD/CSD tight-coupling for whirl-flutter predictions rather than correlating against previous results.

Original languageEnglish (US)
StatePublished - Jan 1 2018
EventAHS International Technical Meeting on Aeromechanics Design for Transformative Vertical Flight 2018 - San Francisco, United States
Duration: Jan 16 2018Jan 18 2018

Other

OtherAHS International Technical Meeting on Aeromechanics Design for Transformative Vertical Flight 2018
CountryUnited States
CitySan Francisco
Period1/16/181/18/18

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering

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    Corle, E., Schmitz, S., & Floros, M. (2018). Coupled CFD/CSD predictions of semi-span XV-15. Paper presented at AHS International Technical Meeting on Aeromechanics Design for Transformative Vertical Flight 2018, San Francisco, United States.