Improved Acoustical Treatment for Engine Test Stands PDF Download
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Author: John T. Welbourn
Publisher:
ISBN:
Category : Absorption of sound
Languages : en
Pages : 104
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Book Description
This report summarizes an investigation and test of improved materials, noise control devices, and methods of application to engine test stands for the purpose ocing radiated noise and in creasing structural durability. Included are excerpts from an acoustical survey of a modified test stand and a full report of the acoustical evaluation of experimental exhaust units for a Transportable Turbojet Engine Test Stand. Exper imental work was performed at Wright-Patterson Air Force Base, Ohio. (Author).
Author: John T. Welbourn
Publisher:
ISBN:
Category : Absorption of sound
Languages : en
Pages : 104
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Book Description
This report summarizes an investigation and test of improved materials, noise control devices, and methods of application to engine test stands for the purpose ocing radiated noise and in creasing structural durability. Included are excerpts from an acoustical survey of a modified test stand and a full report of the acoustical evaluation of experimental exhaust units for a Transportable Turbojet Engine Test Stand. Exper imental work was performed at Wright-Patterson Air Force Base, Ohio. (Author).
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1416
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Author: EG-1E Gas Turbine Test Facilities and Equipment
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
This document discusses, in broad and general terms, the subject of acoustical considerations in engine test cells. One of the primary purposes of an engine test cell is to control the noise emanating from the operating engine in order to reduce noise in the surrounding facility and community to acceptable levels. This is done by the design and installation of specialized acoustic elements and features, which need to be fully integrated into the overall test cell design. It should be further noted, that the requirements of acoustic control are critical to the proper operation of the engine, safety of plant equipment and personnel, and meeting local and legal noise requirements. One of the primary purposes of engine test cells is reduce the sound emissions from the operating engine to the outside facility or community. The successful reduction and control of this noise requires specialized knowledge, experience, and execution. This paper explores the definitions, requirements, basic science, and recommendations for a test cell operator to select and evaluate qualified solutions and contractors for test cell noise reduction.
Author: National Aeronautics and Space Adm Nasa
Publisher: Independently Published
ISBN: 9781724024503
Category : Science
Languages : en
Pages : 42
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Book Description
Scale model fan rigs that simulate new generation ultra-high-bypass engines at about 1/5-scale are achieving increased importance as development vehicles for the design of low-noise aircraft engines. Testing at small scale allows the tests to be performed in existing anechoic wind tunnels, which provides an accurate simulation of the important effects of aircraft forward motion on the noise generation. The ability to design, build, and test miniaturized acoustic treatment panels on scale model fan rigs representative of the fullscale engine provides not only a cost-savings, but an opportunity to optimize the treatment by allowing tests of different designs. The primary objective of this study was to develop methods that will allow scale model fan rigs to be successfully used as acoustic treatment design tools. The study focuses on finding methods to extend the upper limit of the frequency range of impedance prediction models and acoustic impedance measurement methods for subscale treatment liner designs, and confirm the predictions by correlation with measured data. This phase of the program had as a goal doubling the upper limit of impedance measurement from 6 kHz to 12 kHz. The program utilizes combined analytical and experimental methods to achieve the objectives. Kraft, R. E. and Yu, J. Glenn Research Center; Langley Research Center NASA/CR-1999-209120/VOL1, NAS 1.26:209120/VOL1
Author:
Publisher:
ISBN:
Category : Automobiles
Languages : en
Pages : 156
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Book Description
Author: United States. Office of Science and Technology
Publisher:
ISBN:
Category : Airport noise
Languages : en
Pages : 174
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Author: United States. Office of Noise Abatement
Publisher:
ISBN:
Category : Aerodynamic noise
Languages : en
Pages : 88
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 492
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Book Description
Author: United States. Congress. House. Committee on Appropriations. Subcommittee on Military Construction Appropriations
Publisher:
ISBN:
Category : United States
Languages : en
Pages : 1514
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Book Description
Author: United States. Congress. House Appropriations
Publisher:
ISBN:
Category :
Languages : en
Pages : 958
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Book Description
