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A Computational Study of the Flow Physics of Acoustic Liners

2018-06-24
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Release : 2018-06-24
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Kind : eBook
Book Rating : 965/5 ( reviews)

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Book Synopsis A Computational Study of the Flow Physics of Acoustic Liners by : National Aeronautics and Space Administration (NASA)

Download or read book A Computational Study of the Flow Physics of Acoustic Liners written by National Aeronautics and Space Administration (NASA). This book was released on 2018-06-24. Available in PDF, EPUB and Kindle. Book excerpt: The present investigation is a continuation of a previous joint project between the Florida State University and the NASA Langley Research Center Liner Physics Team. In the previous project, a study of acoustic liners, in two dimensions, inside a normal incidence impedance tube was carried out. The study consisted of two parts. The NASA team was responsible for the experimental part of the project. This involved performing measurements in an impedance tube with a large aspect ratio slit resonator. The FSU team was responsible for the computation part of the project. This involved performing direct numerical simulation (DNS) of the NASA experiment in two dimensions using CAA methodology. It was agreed that upon completion of numerical simulation, the computed values of the liner impedance were to be sent to NASA for validation with experimental results. On following this procedure good agreements were found between numerical results and experimental measurements over a wide range of frequencies and sound-pressure-level. Broadband incident sound waves were also simulated numerically and measured experimentally. Overall, good agreements were also found. Tam, Christopher Langley Research Center

An Investigation of the Flow Physics of Acoustic Liners by Direct Numerical Simulation

2018-06-20
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Release : 2018-06-20
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Kind : eBook
Book Rating : 707/5 ( reviews)

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Book Synopsis An Investigation of the Flow Physics of Acoustic Liners by Direct Numerical Simulation by : National Aeronautics and Space Administration (NASA)

Download or read book An Investigation of the Flow Physics of Acoustic Liners by Direct Numerical Simulation written by National Aeronautics and Space Administration (NASA). This book was released on 2018-06-20. Available in PDF, EPUB and Kindle. Book excerpt: This report concentrates on reporting the effort and status of work done on three dimensional (3-D) simulation of a multi-hole resonator in an impedance tube. This work is coordinated with a parallel experimental effort to be carried out at the NASA Langley Research Center. The outline of this report is as follows : 1. Preliminary consideration. 2. Computation model. 3. Mesh design and parallel computing. 4. Visualization. 5. Status of computer code development. 1. Preliminary Consideration. Watson, Willie R. (Technical Monitor) and Tam, Christopher Langley Research Center

Computational Aeroacoustics

2012-09-28 Technology & Engineering
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Release : 2012-09-28
Genre : Technology & Engineering
Kind : eBook
Book Rating : 569/5 ( reviews)

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Book Synopsis Computational Aeroacoustics by : Christopher K. W. Tam

Download or read book Computational Aeroacoustics written by Christopher K. W. Tam. This book was released on 2012-09-28. Available in PDF, EPUB and Kindle. Book excerpt: Computational aeroacoustics (CAA) is a relatively new research area. CAA algorithms have developed rapidly and the methods have been applied in many areas of aeroacoustics. The objective of CAA is not simply to develop computational methods but also to use these methods to solve practical aeroacoustics problems and to perform numerical simulation of aeroacoustic phenomena. By analysing the simulation data, an investigator can determine noise generation mechanisms and sound propagation processes. This is both a textbook for graduate students and a reference for researchers in CAA and as such is self-contained. No prior knowledge of numerical methods for solving partial differential equations (PDEs) is needed, however, a general understanding of partial differential equations and basic numerical analysis is assumed. Exercises are included and are designed to be an integral part of the chapter content. In addition, sample computer programs are included to illustrate the implementation of the numerical algorithms.

Prediction of a Flow Velocity Using Experimental and Computational Study of Flow-Induced Sound on Airflow Through an Orifice

2016
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Release : 2016
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Book Synopsis Prediction of a Flow Velocity Using Experimental and Computational Study of Flow-Induced Sound on Airflow Through an Orifice by : 吳忠慶

Download or read book Prediction of a Flow Velocity Using Experimental and Computational Study of Flow-Induced Sound on Airflow Through an Orifice written by 吳忠慶. This book was released on 2016. Available in PDF, EPUB and Kindle. Book excerpt:

Computational Aeroacoustics

2012-09-28 Mathematics
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Release : 2012-09-28
Genre : Mathematics
Kind : eBook
Book Rating : 78X/5 ( reviews)

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Book Synopsis Computational Aeroacoustics by : Christopher K. W. Tam

Download or read book Computational Aeroacoustics written by Christopher K. W. Tam. This book was released on 2012-09-28. Available in PDF, EPUB and Kindle. Book excerpt: Both a textbook for graduate students with exercises and a reference with code for researchers in computational aeroacoustics (CAA).

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