Version 1
: Received: 19 April 2021 / Approved: 20 April 2021 / Online: 20 April 2021 (13:19:15 CEST)
How to cite:
Hao, A.-P.; Jia, Y.-H. Aerodynamic and Aeroacoustic Performance of Tail Rotor Investigation and Modification. Preprints2021, 2021040546. https://doi.org/10.20944/preprints202104.0546.v1
Hao, A.-P.; Jia, Y.-H. Aerodynamic and Aeroacoustic Performance of Tail Rotor Investigation and Modification. Preprints 2021, 2021040546. https://doi.org/10.20944/preprints202104.0546.v1
Hao, A.-P.; Jia, Y.-H. Aerodynamic and Aeroacoustic Performance of Tail Rotor Investigation and Modification. Preprints2021, 2021040546. https://doi.org/10.20944/preprints202104.0546.v1
APA Style
Hao, A. P., & Jia, Y. H. (2021). Aerodynamic and Aeroacoustic Performance of Tail Rotor Investigation and Modification. Preprints. https://doi.org/10.20944/preprints202104.0546.v1
Chicago/Turabian Style
Hao, A. and Yu-Hong Jia. 2021 "Aerodynamic and Aeroacoustic Performance of Tail Rotor Investigation and Modification" Preprints. https://doi.org/10.20944/preprints202104.0546.v1
Abstract
With the increasingly stringent airworthiness standards, the noise generated during the rotorcraft flight is gradually attracting people’s attention. It widely operated helicopters at low altitudes because of their maneuverability. The way to reduce the noise caused by the complex airflow of the helicopter rotor system has progressively become a hot topic for researchers. Using a hybrid acoustic analysis method, this paper investigates the improvement of the noise and thrust of the helicopter’s tail rotor through the tail rotor structural parameters. For the basic model, the turbulence simulation is performed using an incompressible detached eddy simulation (DES) method, and the Lighthill acoustic analog equation is calculated using the finite element method (FEM). We verified the accuracy of the method through wind tunnel tests. We chose a series of structural parameters for sound simulation and fluid simulation calculations. The results indicate that the modified tail rotor noise reduced by 16.5 dBA and the total thrust increased by 19.9% from the prototype model. This work can enhance the duct tail rotor design to improve aerodynamic and aeroacoustic performance.
Keywords
helicopter, tail rotor, aeroacoustic, finite element method, computational fluid dynamic
Subject
Engineering, Mechanical Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.