A Study of the Effect of Periodic Structure on the Attenuation Performance of the Mufflers

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ISBN 13 :
Total Pages : 129 pages
Book Rating : 4.:/5 (973 download)

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Book Synopsis A Study of the Effect of Periodic Structure on the Attenuation Performance of the Mufflers by : Xiaofeng Shi

Download or read book A Study of the Effect of Periodic Structure on the Attenuation Performance of the Mufflers written by Xiaofeng Shi and published by . This book was released on 2016 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: The expansion chamber muffler is an effective device for noise reduction in duct systems. The transmission loss of the single expansion muffler has a periodic character that is often used for the periodic noise control. The Bloch wave theory and the transfer matrix method are used to study the wave propagation in periodic expansion chamber mufflers and the dispersion characteristics are examined. The theory is validated against finite element method simulation. Compared to a single expansion chamber muffler, the stopbands of the finite periodic structure is mainly due to its dispersion characteristics. With different configuration, the results indicate that the periodic structure can enhance the transmission loss within a narrower frequency range or change effective noise control frequency ranges with different distance between mufflers. Because of the high acoustic resistance and low mass reactance due to the sub-millimeter perforation, the micro-perforated muffler can provide considerable sound attenuation of duct noise. The wave propagation in periodic micro-perforated mufflers is studied theoretically, numerically and experimentally. This study indicates that the combination of the Bragg reflection due to the periodic structure and the resonance of the micro-perforated muffler can result in different transmission loss. The proposed periodic placement of micro-perforated mufflers can provide lower frequency noise control within a broader frequency range or enhance transmission loss around the resonant frequency.

Scientific and Technical Aerospace Reports

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ISBN 13 :
Total Pages : 252 pages
Book Rating : 4.:/5 (3 download)

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Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1991 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Masters Theses in the Pure and Applied Sciences

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Publisher : Springer Science & Business Media
ISBN 13 : 1461573882
Total Pages : 414 pages
Book Rating : 4.4/5 (615 download)

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Book Synopsis Masters Theses in the Pure and Applied Sciences by : Wade H. Shafer

Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, SIld disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all con cerned if the printing and distribution of the volumes were handled by an interna and broader dissemination. tional publishing house to assure improved service Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Cor poration of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 30 (thesis year 1985) a total of 12,400 theses titles from 26 Canadian and 186 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this important annual reference work.

Applied Mechanics Reviews

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ISBN 13 :
Total Pages : 276 pages
Book Rating : 4.:/5 (26 download)

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Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1972 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Acoustics of Ducts and Mufflers

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Publisher : John Wiley & Sons
ISBN 13 : 1118443098
Total Pages : 379 pages
Book Rating : 4.1/5 (184 download)

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Book Synopsis Acoustics of Ducts and Mufflers by : M. L. Munjal

Download or read book Acoustics of Ducts and Mufflers written by M. L. Munjal and published by John Wiley & Sons. This book was released on 2014-02-04 with total page 379 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fully updated second edition of the premier reference book on muffler and lined duct acoustical performance Engine exhaust noise pollutes the street environment and ventilation fan noise enters dwellings along with fresh air. People have become conscious of their working environment. Governments of most countries have responded to popular demand with mandatory restrictions on sound emitted by automotive engines, and a thorough knowledge of acoustics of ducts and mufflers is needed for the design of efficient muffler configurations. This fully updated Second Edition of Acoustics of Ducts and Mufflers deals with propagation, reflection and dissipation/absorption of sound along ducts/pipes/tubes, area discontinuities, perforated elements and absorptive linings that constitute the present-day mufflers and silencers designed to control noise of exhaust and intake systems of automotive engines, diesel-generator sets, compressors and HVAC systems. It includes equations, figures, tables, references, and solved examples and unsolved exercises with answers, so it can be used as a text book as well as a reference book. It also offers a complete presentation and analysis of the major topics in sound suppression and noise control for the analysis and design of acoustical mufflers, air conditioning and ventilation duct work. Both the fundamentals and the latest technology are discussed, with an emphasis on applications. Deals with reactive mufflers, dissipative silencers, the frequency-domain approach, and the time-domain approach. Fully updated second edition of the premier reference book on muffler and lined duct acoustical performance, in one complete volume Presents original new research on topics including baffle silencers and louvers, 3D analytical techniques, and flow-acoustic analysis of multiply-connected perforated-element mufflers Includes a general design procedure to help muffler designers in the automotive industry, exhaust noise being a major component of automobile and traffic noise pollution Written by an expert with four decades’ experience in teaching to graduate students, publishing extensively in reputed international journals, and consulting with industry for noise control as well as designing for quietness

The Journal of the Acoustical Society of America

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ISBN 13 :
Total Pages : 548 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis The Journal of the Acoustical Society of America by : Acoustical Society of America

Download or read book The Journal of the Acoustical Society of America written by Acoustical Society of America and published by . This book was released on 2002 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt:

NASA Scientific and Technical Publications

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ISBN 13 :
Total Pages : 188 pages
Book Rating : 4.F/5 ( download)

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Download or read book NASA Scientific and Technical Publications written by and published by . This book was released on 1991 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Technical Publications Announcements with Indexes

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ISBN 13 :
Total Pages : 1318 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Technical Publications Announcements with Indexes by : United States. National Aeronautics and Space Administration

Download or read book Technical Publications Announcements with Indexes written by United States. National Aeronautics and Space Administration and published by . This book was released on 1962 with total page 1318 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Energy Research Abstracts

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ISBN 13 :
Total Pages : 584 pages
Book Rating : 4.:/5 (3 download)

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Book Synopsis Energy Research Abstracts by :

Download or read book Energy Research Abstracts written by and published by . This book was released on 1990 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Government Reports Annual Index

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ISBN 13 :
Total Pages : 1520 pages
Book Rating : 4.3/5 (91 download)

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Download or read book Government Reports Annual Index written by and published by . This book was released on 1984 with total page 1520 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.

The Shock and Vibration Digest

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ISBN 13 :
Total Pages : 552 pages
Book Rating : 4.F/5 ( download)

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Download or read book The Shock and Vibration Digest written by and published by . This book was released on 1999 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt:

International Aerospace Abstracts

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ISBN 13 :
Total Pages : 1020 pages
Book Rating : 4.F/5 ( download)

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Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 1020 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Aeronautical Engineering

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ISBN 13 :
Total Pages : 712 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Aeronautical Engineering by :

Download or read book Aeronautical Engineering written by and published by . This book was released on 1993 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt: A selection of annotated references to unclassified reports and journal articles that were introduced into the NASA scientific and technical information system and announced in Scientific and technical aerospace reports (STAR) and International aerospace abstracts (IAA)

Technical Abstract Bulletin

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ISBN 13 :
Total Pages : 1148 pages
Book Rating : 4.:/5 (5 download)

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Book Synopsis Technical Abstract Bulletin by : Defense Documentation Center (U.S.)

Download or read book Technical Abstract Bulletin written by Defense Documentation Center (U.S.) and published by . This book was released on 1964 with total page 1148 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Noise/news International

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ISBN 13 :
Total Pages : 576 pages
Book Rating : 4.0/5 ( download)

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Download or read book Noise/news International written by and published by . This book was released on 1993 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Nuclear Science Abstracts

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ISBN 13 :
Total Pages : 1220 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Nuclear Science Abstracts by :

Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1967 with total page 1220 pages. Available in PDF, EPUB and Kindle. Book excerpt:

AIAA 79-0570 - AIAA 79-0629

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ISBN 13 :
Total Pages : 638 pages
Book Rating : 4.0/5 ( download)

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Book Synopsis AIAA 79-0570 - AIAA 79-0629 by :

Download or read book AIAA 79-0570 - AIAA 79-0629 written by and published by . This book was released on 1979 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt: