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A theoretical study of self soise generation in turbulent jets using one dimensional turbulence and Lighthill’s acoustic analogy

Sharma, Sparsh and Ayton, Lorna and Klein, Marten and Mendina Méndez, Juan A. (2023) A theoretical study of self soise generation in turbulent jets using one dimensional turbulence and Lighthill’s acoustic analogy. In: Inter-NOISE 2023. Inter-Noise 2023, 2023-08-20 - 2023-08-23, Tokyo. doi: 10.3397/IN_2023_0056.

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Official URL: https://www.ingentaconnect.com/content/ince/incecp/2023/00000268/00000008/art00033

Abstract

Modeling and simulation of turbulent jet noise is an ongoing numerical challenge relevant to noise pollution control. In the present study, the concept of a novel dimensionally reduced modeling approach based on the so-called one-dimensional turbulence model (ODT) is discussed. ODT aims to resolve source terms due to velocity and kinematic pressure variations in the acoustic near-field at all relevant scales, but only for a single physical coordinate. In the standalone formulation of the model, the physical coordinate taken as a notional line of sight that is pointing in radial cross-stream direction and advected downstream with the axial velocity of the jet while the microscales evolve. Thereby, turbulence is represented by a stochastically sampled sequence of discrete mapping events that punctuate the deterministic molecular diffusive advancement. It is discussed how an ensemble of small-scale resolving independent flow realizations can be used to estimate turbulent noise sources from a range of scales. The main objective is to present an approach for the prediction of broadband self-noise generated by a turbulent jet using ODT and Lighthill’s equation. Dedicated experimental measurements are conducted for verification and validation of the numerical modeling approach.

Item URL in elib:https://elib.dlr.de/200927/
Document Type:Conference or Workshop Item (Speech)
Title:A theoretical study of self soise generation in turbulent jets using one dimensional turbulence and Lighthill’s acoustic analogy
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Sharma, SparshUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ayton, LornaUniversity of CambridgeUNSPECIFIEDUNSPECIFIED
Klein, MartenBTU Cottbus-SenftenbergUNSPECIFIEDUNSPECIFIED
Mendina Méndez, Juan A.BTU Cottbus-SenftenbergUNSPECIFIEDUNSPECIFIED
Date:2023
Journal or Publication Title:Inter-NOISE 2023
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI:10.3397/IN_2023_0056
Status:Published
Keywords:turbulent jets, turbulence, Lighthill's acoustic analogy, downstream, numeric modeling approach, governing equations
Event Title:Inter-Noise 2023
Event Location:Tokyo
Event Type:international Conference
Event Start Date:20 August 2023
Event End Date:23 August 2023
Organizer:I-INCE
HGF - Research field:Energy
HGF - Program:Materials and Technologies for the Energy Transition
HGF - Program Themes:Photovoltaics and Wind Energy
DLR - Research area:Energy
DLR - Program:E SW - Solar and Wind Energy
DLR - Research theme (Project):E - Wind Energy
Location: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Wind Energy
Deposited By: Stebner, Margrit Elisabeth
Deposited On:14 Dec 2023 12:13
Last Modified:24 Apr 2024 21:01

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