Výsledky vyhledávání - "Acoustic pressures"

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Non-normality and internal flame dynamics in premixed flame–acoustic interaction

Publikováno v: Journal of Fluid Mechanics. 679:315-342

This paper investigates the non-normal nature of premixed flame–acoustic interaction. The thermoacoustic system is modelled using the acoustic equations for momentum and energy, together with the equation for the evolution of the flame front obtain

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::15e2e7b9dd2966ddb65dffdf32de4f4b
https://doi.org/10.1017/jfm.2011.140

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Application of the MFS to inverse obstacle scattering problems

Autor: Karageorghis, Andreas, Lesnic, D.

Publikováno v: Engineering Analysis with Boundary Elements
Eng Anal Boundary Elem

In this paper, the method of fundamental solutions (MFS) is used to detect the shape, size and location of a scatterer embedded in a host acoustic homogeneous medium from scant measurements of the scattered acoustic pressure in the vicinity of the ob

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b318bd513d329e91b3272f493fe5e587
https://doi.org/10.1016/j.enganabound.2010.11.010

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Numerical prediction of thermoacoustic instabilities with a V-Flame

Autor: Na, Wei, Efraimsson, Gunilla, Boij, Susann

In this paper, results from a numerical solver for the Helmholtz equation using the Finite Element Method (FEM) for predicting thermoacoustic instabilities are presented. The one-dimensional n-τ flame model, which is governed by an interaction index

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::080b9296fb7e31a550c4cfb8983d0d54
http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-195437

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Investigating the dynamics of combustion-driven oscillations leading to lean blowout

Autor: Lipika Kabiraj, Sujith R I, Pankaj Wahi

Publikováno v: IndraStra Global.

The dynamics of combustion-driven thermoacoustic oscillations for a ducted laminar premixed flame has been investigated in lean equivalence ratio conditions. Combustion instability appears in the system as acoustic pressure and flame surface oscillat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::08ad595f9883a9b8f2d977304f00923d
https://igi.indrastra.com/items/show/80534

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Nonlinear self-excited thermoacoustic oscillations: Intermittency and flame blowout

Autor: R. I. Sujith, Lipika Kabiraj

Publikováno v: IndraStra Global.

Nonlinear self-excited thermoacoustic oscillations appear in systems involving confined combustion in the form of coupled acoustic pressure oscillations and unsteady heat release rate. In this paper, we investigate the nonlinear transition undergone

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::488fc7c75227f6ad5ec078407699da70
http://hdl.handle.net/11717/13504

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Effect of ultrasound on bubble breakup within the mixing chamber of an effervescent atomizer

Autor: K. Ramamurthi, T.K. Jagannathan, Rajarathinavelu Nagarajan

Publikováno v: IndraStra Global.

Gas bubbles introduced into a liquid in the mixing chamber help to break up the liquid into fine droplets on being expanded to the ambient pressure. The passage of gas bubbles through the orifice of the nozzle requires that the size of the bubbles be

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d1e2ecd2ee3a3d096e89d9104f575340
https://igi.indrastra.com/items/show/79278

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Acoustic source data for medium speed IC-engines

Autor: Hans Bodén, Raimo Turunen, Mats Åbom, Antti Hynninen

Publikováno v: Scopus-Elsevier
Hynninen, A, Turunen, R, Åbom, M & Bodén, H 2012, ' Acoustic source data for medium speed IC-engines ', Journal of Vibration and Acoustics, vol. 134, no. 5, 051008 . https://doi.org/10.1115/1.4006415

Knowledge of the acoustic source characteristics of internal combustion engines (IC-engines) is of great importance when designing the exhaust duct system and its components to withstand the resulting dynamic loads and to reduce the exhaust noise emi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::59cb0c71269a06acfd508d5743bf7d32
http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-148739

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The method of fundamental solutions for inverse obstacle acoustic scattering

Autor: Karageorghis, Andreas, Lesnic, D.

Publikováno v: WIT Transactions on Modelling and Simulation
32nd International Conference on Boundary Elements and Other Mesh Reduction Methods, BEM/MRM 2010

In this paper we propose a simple method for detecting (shape, size and location) a scatterer embedded in a host acoustic homogeneous medium from scant measurements of the scattered acoustic pressure in the vicinity (near-or far-field) of the obstacl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0ca36a6abdb8fd26ff6ba771a58bd04b
http://gnosis.library.ucy.ac.cy/handle/7/57053

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Revisiting a Model for Combustion Instability Involving Vortex Shedding

Autor: Koushik Balasubramanian, R. I. Sujith, Bharat Tulsyan

Publikováno v: Scopus-Elsevier

We revisit a simple reduced order model (Matveev, K., and Culick, F. E. C, 2003, A Model for Combustion Instability Involving Vortex Shedding, Combust Sci. and Tech., 175, 1059) and re-examine its implications in light of the non-normal and nonlinear

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1345c64a816242c4b9e10290cd5484b1
https://doi.org/10.2514/6.2008-4573

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