Data assimilation of flow-acoustic resonance

Author: krbj

August undefined, 2024

WebAcoustic resonance is a phenomenon in which an acoustic system amplifies sound waves whose frequency matches one of its own natural frequencies of vibration (its resonance … WebOct 1, 2024 · In this work, the flow-induced acoustic resonance in square closed side branches is investigated experimentally to clarify the resonance mechanism. Three …

Machine Learning and Data Assimilation techniques for fluid flow ...

WebJun 1, 2024 · A data assimilation (DA) strategy was developed for accurate prediction of the flow-acoustic resonant fields within a channel-branch system. The challenges of … WebJul 24, 2024 · A novel theoretical model of the internal flow field in multistage axial compressors based on an eigenvalue approach is developed, in order to predict the onset of acoustic resonance in aircraft engines. Using an example high-speed four-stage compressor, it is shown that one of the resultant frequencies is in excellent agreement … how did bioaccumulation hurt bald eagles

Data assimilation of flow-acoustic resonance Request …

WebMar 30, 2024 · Abstract. Acoustic resonances in internal flows can cause noise, vibration, and even equipment damage. One geometry prone to acoustic resonance is a deadleg at the point where the main flow turns into a side branch. Here, we report experimental and computational fluid dynamics (CFD) studies of flow-generated pulsation in such a … WebFeb 22, 2024 · This study aims to detect the unsteady features of the turbulent flow behind a wall-proximity rib using resolvent analysis, based on the mean flow field determined … WebAug 18, 2024 · Abstract. This paper presents an experimental investigation of the vorticity shedding and the susceptibility of acoustic resonance excitation for a square tube array with an intermediate tube spacing (i.e., pitch-to-diameter ratio (P/D) of 1.73). The tube array could be rotated about an axis normal to the flow direction so that the effect of the flow … how many schools require clear backpacks

Acoustic Data Assimilation: Concepts and Examples

Numerical Simulation of the Flow-Sound Interaction Mechanisms of …

WebJul 9, 2010 · Here we present further evidence derived from operating experience of full size steam generator and tubular heat exchanger tube banks of which 19 experienced acoustic vibration or acoustic resonance and 27 experienced no vibration or no acoustic resonance within the operating flow range. The present data show that the decisive … WebJan 5, 2010 · Flow-Excited Acoustic Resonance in Industry. The excitation mechanism of acoustic resonances has long been recognized, but the industry continues to be plagued by its undesirable consequences; manifested in severe vibration and noise problems in a wide range of industrial applications. This paper focuses on the nature of the acoustic … how did biodiversity startWebadshelp[at]cfa.harvard.edu The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A how many schools of buddhism are there

"WebJan 1, 2009 · Flow-excited acoustic resonance of closed side-branches is caused by a feedback mechanism between the instability of the free shear layer at the mouth of the … " - Data assimilation of flow-acoustic resonance

Data assimilation of flow-acoustic resonance

Differentiating Between Acoustic and Flow-Induced Vibration …

WebOct 3, 2024 · The frequency of vortex shedding can be estimated by following the guidance of Ziada and Shine [1]. If vibration data taken with accelerometers and strain gauges suggest an acoustic resonance at … WebOct 18, 2016 · The acoustic data assimilation (ADA), which melds instant observed data of different natures and various physical models, has recently been developed as a new …

Did you know?

WebIn this paper, we address the problem of recovering high-resolution information from noisy and low-resolution physical measurements of blood flow (for example, from phase-contrast magnetic resonance imaging [PC-MRI]) using variational data assimilation based on a transient Navier-Stokes model.

WebJan 1, 2011 · The data-assimilated flow-acoustic resonant fields were then comprehensively validated in terms of their acoustic fields, time-averaged flow fields, and phase-dependent flow fields. WebAcoustic resonance is a phenomenon in which an acoustic system amplifies sound waves whose frequency matches one of its own natural frequencies of vibration (its resonance frequencies).. The term "acoustic resonance" is sometimes used to narrow mechanical resonance to the frequency range of human hearing, but since acoustics is defined in …

WebFeb 11, 2024 · Abstract. The flow-excited acoustic resonance phenomenon, which is instigated by periodic flow perturbation, leads to the generation of acute sound pressure. In this work, we investigated the characteristics of the flow-excited acoustic resonance for circular finned cylinders with different fin heights. The fin height is expressed as a … WebACOUSTIC-INDUCED VIBRATION AIV refers to structural vibration excited by intense acoustic pressure in a piping system with vapor flow. The acoustic pressure is usually created from pressure-reducing devices due to high pressure drops and mass flows of vapor services. These acoustic energies excite the pipe wall circumferentially due to

WebMay 3, 2024 · This work presents an anisotropic formulation for data assimilation (DA) of turbulent flows using the continuous adjoint system. This DA scheme serves as a tool to …

WebMay 27, 2024 · Abstract. The present work concentrates on the simulation enhancement of steam flow through a control valve using the data assimilation (DA) approach based on … how did biology startWebJan 5, 2010 · Flow-Excited Acoustic Resonance in Industry. The excitation mechanism of acoustic resonances has long been recognized, but the industry continues to be … how many schools pay students for good gradesWebJun 1, 2024 · This website requires cookies, and the limited processing of your personal data in order to function. By using the site you are agreeing to this as outlined in our … how many schools play cricket in englandWebMay 2, 2024 · This study proposes a sweeping jet as a novel solution to control catastrophic flow–acoustic resonance through a combined experimental and scale-adaptive … how many schools shootings in 2022WebA data assimilation (DA) strategy was developed for accurate prediction of the flow-acoustic resonant fields within a channel-branch system. The challenges of numerical … how many schools promote mental healthWebTo accurately predict the characteristics of the three-dimensional flow fields of rotors, the constants of the shear stress transport model were optimized via data assimilation (DA) using the ... how many schools teach abstinenceWebA data assimilation (DA) strategy was developed for accurate prediction of the flow-acoustic resonant fields within a channel-branch system. The challenges of numerical … how did biosphere 2 fail