Extensions to the acoustic scattering analysis for cloaks in non-uniform mean flows

The Journal of the Acoustical Society of America
Yu HeXun Huang

Abstract

Most of the acoustic cloak designs are based on the stationary medium, which, however, may be inaccurate in many practical applications with non-uniform flows. The optimization of the acoustic cloaking performance was described as an active noise control problem, and the theoretical model by Huang, Zhong, and Stalnov [J. Acoust. Soc. Am. 135(5), 2571-2580 (2014b)] was employed for the quick evaluation of the sound scattering. In this work, extensions are made to address the unsolved but essential issues in the model. First, the impact of the discontinuities at the interface between the cloak and surrounding fluids is investigated. Second, the high-order Born's approximation is employed to solve the sound governing equation, which can quickly improve the prediction accuracy. Finally, the optimized cloaking strategy is applied to airfoils in turbulent flows to demonstrate the capability of the proposed modelling for cases of practical importance. Also, it is found that the performance of the optimized cloak is insensitive to the frequency of the incident wave. The promising results suggest that an optimized cloaking design can effectively suppress the sound scattering, providing the confidence with the mathematical framework for ...Continue Reading

References

May 27, 2006·Science·J B PendryD R Smith
Feb 1, 2008·Physical Review Letters·Steven A CummerAnthony Starr
Oct 15, 2008·Physical Review Letters·M FarhatA B Movchan
Feb 12, 2009·The Journal of the Acoustical Society of America·Andrew N Norris
Jun 11, 2009·The Journal of the Acoustical Society of America·Steven A Stotts, Robert A Koch
Jan 15, 2011·Physical Review Letters·Xuefeng ZhuJianchun Cheng
Mar 17, 2011·Physical Review Letters·Shu ZhangNicholas Fang
May 13, 2011·Nature·Yang-Yu LiuAlbert-László Barabási
Oct 9, 2012·The Journal of the Acoustical Society of America·Liang-Wu Cai
Jun 19, 2013·Scientific Reports·C García-MecaA Martínez
Nov 15, 2013·Nature·Martin Maldovan
May 13, 2014·The Journal of the Acoustical Society of America·Xun HuangOksana Stalnov
Jun 10, 2015·Scientific Reports·Jun XuSébastien Guenneau

❮ Previous
Next ❯

Citations

Oct 25, 2020·Scientific Reports·Umberto Iemma, Giorgio Palma
Jan 1, 2021·The Journal of the Acoustical Society of America·M E D'EliaY Aurégan

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.