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Aerodynamic

Name
ANTONIO
Surname
JIMENEZ GARCIA
Scientific organization
University of Glasgow
Academic degree
PhD student
Position
Student
Scientific discipline
Machinery & Energy
Topic
Aerodynamic
Abstract
This work is divided into two parts. The first is devoted to the analysis of the performance of a 1:5 model-scale ERICA tiltrotor in aeroplane mode configuration. For this case, numerical simulations are based on the Unsteady Reynolds Averaged Navier-Stokes equations, where the rotor blades were fully resolved. Uniform actuator disk is put forward to quantify the rotor effect on the total wing loads. The capability of the present CFD method in predicting the loads on the ERICA fuselage is investigated using a quasi-steady approach for the corridor and helicopter mode configurations.
Keywords
CFD, Aerodynamic, Tiltrotor
Summary

Performance analysis of a 1:5 model-scale ERICA tiltrotor is presented, obtained using CFD. Three configurations, corresponding to minimum speed and high load for an aeroplane, corridor, and helicopter mode; are considered. For the aeroplane case, numerical simulations were based on the Unsteady Reynolds Averaged Navier-Stokes equations, where the rotor blades were fully resolved. The use of a uniform actuator disk was put forward as a means to quantify effect on the total loads. Comparisons with experimental data showed a good agreement and revealed the 4/rev. blade passage effect on the loads for the fully resolved approach. Results of the CFD with the uniform actuator disk also produced adequate estimates of the loads at the aerodynamic interaction zone.

The corridor and helicopter mode configurations were also computed using a uniform actuator disk. For the corridor case, results showed an excellent agreement with the experiment data at cross sections on the fuselage, fixed wing, and tiltable wing of the ERICA tiltrotor. The helicopter CFD predictions were in fair agreement with the DNW-LLF experiment on the fuselage and fixed wing, while the peak of CP distribution was under-predicted the region of aerodynamic interaction. The overall agreement with the experimental data demonstrated the capability of the present CFD method to accurately predict tiltrotor flows.