Data assimilation of flow-acoustic resonance

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August undefined, 2024

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 … WebJun 14, 2024 · 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. The time-averaged flow fields were obtained from planar … A data assimilation (DA) strategy was developed for accurate prediction of the … A data assimilation (DA) strategy was developed for accurate prediction of the …

Data assimilation of flow-acoustic resonance - PubMed

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. WebApr 30, 2024 · The reconstruction performances of the proposed Navier–Stokes-based data-assimilation approach for single-instant velocity measurements (NS-DA-SIM) are assessed using a numerical dataset for the 3D flow past a cylinder. Comparisons with existing data assimilation methodologies allow to further illustrate the merits of the … theoretical and applied mechanics letters if

Variational data assimilation for transient blood flow ... - PubMed

WebDec 15, 2024 · 1. Introduction. Flow-induced acoustic resonances in closed side branches are excited by an unstable separated shear flow, in which vortex-like structures form at the upstream edge of the branch and impinge at the downstream edge (Uchiyama and Morita, 2024).When the interaction and mutual enhancement between the unstable … WebAs shown in Fig. 2.32, acoustic resonances are classified into two types depending on the acoustic mode shape; Fig. 2.32(a) shows the form of the first type of excitation where the acoustic resonant modes are dominant in the direction perpendicular both to the gas flow and the tube axes. The second type is shown in Fig. 2.32(b).In this case, the acoustic … 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 … theoretical and applied genetics 期刊缩写

Flow-Excited Acoustic Resonance in Industry J. Pressure Vessel ...

Control of Flow–Acoustic Resonance Using Sweeping Jets

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 … theoretical and applied genetics影响因子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. theoretical and applied mechanics letters是几区

"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 … " - Data assimilation of flow-acoustic resonance

Data assimilation of flow-acoustic resonance

Theory on the Onset of Acoustic Resonance in a Multistage …

WebAug 28, 2015 · The Pump Symposium proceedings have many case studies of resonance (BB3 long crossovers being the most common location). Just got to the link below and type in acoustic resonance as the search ... 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 …

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WebThis paper focuses on flow-excited acoustic resonance of closed side-branches. First, a design guide that can be used to predict the onset and the intensity of resonance is … WebOct 13, 2024 · We model the resonance mechanism underpinning generation of A1 and A2 screech tones in an under-expanded supersonic jet. Starting from the resonance model recently proposed by Mancinelli et al. (Exp. Fluids, vol. 60, 2024, p. 22), where the upstream-travelling wave is a neutrally stable guided-jet mode, we here present a more …

WebAug 31, 2024 · A nonlinear ensemble-variational data assimilation is performed in order to estimate the unknown flow field over a slender cone at Mach 6, from isolated wall-pressure measurements. ... who used a simple random-noise inflow forcing to model the receptivity processes from acoustic waves in a Mach-6 flow. However, significant overpredictions ... WebJun 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 …

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 … 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 …

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 …

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 … theoretical and applied mechanics letters 分区WebApr 28, 2009 · A numerical simulation of the flow-excited acoustic resonance for the case of two-tandem cylinders in cross-flow is performed. The spacing ratio between the cylinders (L/D=2.5) is inside the proximity interference region. Similar simulation is performed for the case of a single cylinder. The unsteady flow field is simulated using a finite-volume … theoretical and applied mechanics letters期刊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 … theoretical and applied mechanics letters几区WebA data assimilation (DA) strategy was developed for accurate prediction of the flow-acoustic resonant fields within a channel-branch system. The challenges of numerical … theoretical and applied mechanics letters 缩写WebTo 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 ... theoretical and applied mechanics uiucWebA data assimilation (DA) strategy was developed for accurate prediction of the flow-acoustic resonant fields within a channel-branch system. The challenges of numerical … theoretical and applied mechanics letters分区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 theoretical and computational chemistry 影响因子