Numerical and Physical Modeling of the Response of Resonator Liners to Intense Sound and High Speed Grazing Flow

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$99,653.00
Award Year:
2009
Program:
SBIR
Phase:
Phase I
Contract:
NNX09CF01P
Agency Tracking Number:
084152
Solicitation Year:
2008
Solicitation Topic Code:
A2.03
Solicitation Number:
n/a
Small Business Information
Hersh Acoustical Engineering Inc
22305 Cairnloch Street, CALABASAS, CA, 91302-5875
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
Y
Duns:
059784298
Principal Investigator:
Alan Hersh
Principal Investigator
(818) 224-4699
haeash@charter.net
Business Contact:
Alan Hersh
Business Official
(818) 224-4699
haeash@charter.net
Research Institution:
n/a
Abstract
An innovative research program is proposed that numerically and physically models the response of resonator liners to intense sound and high speed grazing flow. The research program is divided into two parts. Part 1 addresses the feasibility of performing direct numerical simulation (DNS) of the sound and flow fields of the following: (i) one-slit and two-slit resonators in a normal incidence impedance tube, (ii) adjust and modify the computational algorithm and mesh design to allow the code to perform high temperature simulations, and (iii) use the simulation codes to initiate a study of the performance of high temperature liners. Part 2 develops the following: (iv) a grazing flow multi-slit orifice resonator impedance model, (v) a grazing flow 1-dof multi-circular orifice resonator impedance model and (vi) a 2-dof non-grazing flow multi-circular orifice resonator impedance model. The research program was motivated, in part, by high oil prices that place ever greater demands upon the near-term need to provide aircraft engine acoustic engineers with reasonably accurate tools to design optimized liners and the long-term need to develop sophisticated computational codes to provide physical understanding of the interaction between incident intense sound and grazing flow on resonator liners

* information listed above is at the time of submission.

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