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Morteza Monfaredi, Varvara Asouti, Xenofon Trompoukis, Konstantinos Tsiakas and Kyriakos Giannakoglou
A continuous adjoint-based aeroacoustic optimization, based on a hybrid model including the Ffowcs Williams?Hawkings (FW?H) acoustic analogy, to account for the multidisciplinary design of aero-engine intakes with an axisymmetric geometry, is presented. ...
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Chunyu Guo, Xu Wang, Chongge Chen, Yinghong Li and Jian Hu
Propulsion noise is an enduring problem of significant military and environmental importance. Hence, it is crucial to investigate propeller noise characteristics. In this study, the hydrodynamic performance and noise level of the DARPA (Defense Advanced ...
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Changsheng Chen, Guoping Li, Zhenlai Ma, Ziyi Mei, Bo Gao and Ning Zhang
Podded propulsors have become a focal point of research in the field of marine propulsion in recent years due to their high efficiency, low noise, and excellent maneuverability. To investigate the acoustic characteristics induced by the flow field of pod...
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Zhiteng Zhou, Yi Liu, Hongping Wang and Shizhao Wang
A mass-conserved formulation for the Ffowcs-Williams?Hawkings (FW?H) integral is proposed to suppress contributions of spurious mass flux to the far-field sound at very low Mach numbers. The far-field condition and compact-source region assumptions are e...
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Yadong Zhang and Yijun Liu
A new approach to accelerating the evaluation of monopole and dipole source integrals via the fast multipole method (FMM) in the time domain for general three-dimensional (3-D) aeroacoustic problems is presented in this paper. In this approach, the aeroa...
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Giacomo Rismondo, Marta Cianferra and Vincenzo Armenio
The present paper contains the results of the numerical analysis of the interaction between a Newtonian incompressible turbulent flow and a linear elastic slender body, together with the influence of the fluid?structure interaction (FSI) on the noise gen...
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Iro Malefaki and Kostas Belibassakis
Biomimetic flapping-foil thrusters can operate efficiently while offering desirable levels of thrust required for the propulsion of a small vessel or an Autonomous Underwater Vehicle (AUV). These systems have been studied both as main propulsion devices ...
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Kostas Belibassakis, John Prospathopoulos and Iro Malefaki
Flapping-foil thrusters are systems that operate at a substantially lower frequency compared with marine propellers and are characterized by a much smaller power concentration. These biomimetic devices are able to operate very efficiently, offering desir...
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Hua-Dong Yao, Zhongjie Huang, Lars Davidson, Jiqiang Niu and Zheng-Wei Chen
We study noise generation at the blade tips of propellers designed for future electric aircraft propulsion and, furthermore, analyze the interrelationship between noise mitigation and aerodynamics improvement in terms of propeller geometric designs. Clas...
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Chawki Abdessemed, Abdessalem Bouferrouk and Yufeng Yao
This work explores the aerodynamic and aeroacoustic responses of an airfoil fitted with a harmonically morphing Trailing Edge Flap (TEF). An unsteady parametrization method adapted for harmonic morphing is introduced, and then coupled with dynamic meshin...
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