Direct numerical simulation of fluid-acoustic interactions in a recorder with tone holes

The Journal of the Acoustical Society of America
Hiroshi YokoyamaAkiyoshi Iida

Abstract

To clarify fluid-acoustic interactions in an actual recorder with opened and closed tone holes, flow and acoustic fields were directly numerically simulated on the basis of the compressible Navier-Stokes equations. To validate the simulation accuracy, the flow field around the windway and sound pressure above the window were measured. The predicted acoustic fields clarify changes of the positions of pressure nodes and anti-nodes in accordance with the state of the tone holes and the Mach number of the jet velocity. The fundamental mechanism of the self-sustained oscillations in a three-dimensional actual recorder is visualized by the predicted acoustic and flow fields. This result is also consistent with the relationship between the jet behaviors and pressure fluctuations based on the jet-drive model. Moreover, the effects of the fine vortices in the jet, which appear at the high Mach number of jet velocity of 0.099, on the sound are discussed. The time difference between the generation of the disturbances and the most intense deflection of the jet is identified and compared with the time delay of acoustic reflection around the window.

References

Mar 27, 2003·The Journal of the Acoustical Society of America·S DequandA Hirschberg
Feb 23, 2012·The Journal of the Acoustical Society of America·Roman AuvrayPierre-Yves Lagrée
Sep 23, 2014·The Journal of the Acoustical Society of America·N Giordano

❮ Previous
Next ❯

Citations

Dec 3, 2015·The Journal of the Acoustical Society of America·John C PriceDaniel D McKinnon
Sep 2, 2019·The Journal of the Acoustical Society of America·Kimie OnogiAkiyoshi Iida
Jun 4, 2020·The Journal of the Acoustical Society of America·András SzabóGyörgy Paál
Feb 3, 2018·The Journal of the Acoustical Society of America·N Giordano
Mar 27, 2021·The Journal of the Acoustical Society of America·Tsukasa YoshinagaAkiyoshi Iida
May 5, 2021·The Journal of the Acoustical Society of America·Tsukasa YoshinagaAkiyoshi Iida

❮ 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.

Related Papers

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
Toshihiko Hiejima
The Journal of the Acoustical Society of America
Roman AuvrayPierre-Yves Lagrée
The Journal of the Acoustical Society of America
Ida ReytCatherine Weisman
The Journal of the Acoustical Society of America
N Giordano
Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
A MaurelJ E Wesfreid
© 2021 Meta ULC. All rights reserved