SAE ARP 5759-2013 Acoustical Considerations for Engine Test Cells《发动机试验小室用声学注意事项》.pdf
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1、_ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there
2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2013 SAE International All rights reserved. No part of this p
3、ublication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-497
4、0 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/ARP5759 AEROSPACE RECOMMENDED PRACTICE ARP5759 Issued 2013-01 Acoustical Consider
5、ations for Engine Test Cells RATIONALE 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 pap
6、er 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. TABLE OF CONTENTS 1. SCOPE 4 1.1 Purpose . 4 1.2 Beneficiaries 4 1.3 Considerations and Consequences of Imp
7、roper Acoustic Design/Installation . 4 2. APPLICABLE DOCUMENTS 4 2.1 SAE Publications . 4 2.2 Other Applicable Publications . 5 2.3 Definitions . 5 3. ALLOWABLE NOISE LIMITS . 6 3.1 Test Cell Noise Regulations 6 3.1.1 Test Cell Location . 6 3.1.2 Local Airport or Industrial Park Regulations . 6 3.1.
8、3 Local Community Ordinances . 6 3.1.4 AICUZ Air Installations Compatibility Use Zones. 7 3.1.5 OSHA Occupational Safety and Health Administration . 7 3.1.6 HSE Health and Safety Executive . 7 3.1.7 Company Standards and Regulations 7 3.2 Usual Industry Practice for Noise Reduction Standards . 7 3.3
9、 Infrasound . 7 3.4 Perceived Noise Sensitivity and Susceptibility . 8 4. BASICS OF TEST CELL NOISE AND NOISE REDUCTION . 8 4.1 What is Sound? . 8 4.2 What is Noise? 8 4.3 Turbofan Engine Noise . 8 4.4 Sound Intensity . 9 4.5 Sound Propagation . 9 SAE ARP5759 Page 2 of 24 5. BASICS OF TEST CELL NOIS
10、E AND NOISE REDUCTION . 9 5.1 Test Cell Noise Reduction System Components 9 5.2 Barriers 9 5.3 Absorption . 10 5.4 Directivity . 11 5.5 Special Devices . 11 5.5.1 Augmentor Tube Divergent Diffuser . 11 5.5.2 Blast Basket 11 5.5.3 Centerbody 11 5.5.4 Conical Target . 11 5.5.5 Diffuser Screen . 11 5.5
11、.6 Exhaust Collector 11 5.5.7 Helmholz Resonators 11 5.5.8 Ring Diffuser . 11 5.5.9 Secondary Telescopic Inlets and Changing the Space between Engine and Augmentor Tube 12 5.5.10 “Soft” Augmentor Tube . 12 5.6 Active Noise Control . 12 6. SPECIAL CONSIDERATIONS FOR TEST CELL NOISE REDUCTION . 12 6.1
12、 Test Cell Airflow 12 6.1.1 Air Velocity 12 6.1.2 Inlet Air Flow Quality . 13 6.2 Exhaust Temperature . 13 6.3 Exposure to the Elements . 13 6.3.1 Water-soaked Acoustic Elements . 13 6.3.2 Corrosion . 13 6.3.3 Cold Soak 13 6.4 Foreign Object Damage 14 6.5 Site Location . 14 6.6 Equipment Noise Measu
13、rement 14 6.7 Secondary Noise Leaks 14 6.8 Special Considerations for Afterburning Engines . 15 7. MATERIALS, FABRICATION, AND INSTALLATION . 15 7.1 Typical Construction of Baffle . 16 7.2 Materials 17 7.2.1 Common Structural Materials . 17 7.2.2 Internal Frame . 17 7.2.3 Perforated Skin . 18 7.2.4
14、Acoustic Fill Material . 18 7.2.5 Acoustic Fill Facing Material . 19 7.3 Fabrication 19 7.3.1 Complete Assembly 19 7.3.2 Welded or Riveted. 20 7.3.3 Acoustic Material Fill . 20 7.4 Installation . 20 7.4.1 Transportation . 21 7.4.2 Site Storage 21 7.4.3 Cranes and Access . 21 7.4.4 Installation Logis
15、tics 21 7.4.5 Attachment 21 7.4.6 Cleaning and Debris Removal 22 8. SPECIFICATIONS, CONTRACTING, DOCUMENTATION . 22 8.1 Performance Specification 22 8.1.1 Engines to be Tested or Source Noise . 22 8.1.2 Level of Exterior Audible Acoustic Performance . 22 8.1.3 Adjustment of Requirements due to Exist
16、ing and Future Buildings . 23 8.1.4 Specify Performance to meet applicable codes 23 SAE ARP5759 Page 3 of 24 8.1.5 Level of Acoustic Performance in the control room 23 8.1.6 Level of Acoustic Performance in the preparation room . 23 8.1.7 Level of Acoustic Performance in adjacent buildings . 23 8.1.
17、8 Level of Infrasound Performance 23 8.1.9 Length of Service Life . 23 8.2 Validation 24 9. NOTES 24 FIGURE 1 SCHEMATIC ILLUSTRATION OF A MODERN ENGINE TEST CELL 10 FIGURE 2 CROSS SECTION ILLUSTRATION OF TYPICAL ACOUSTIC BAFFLE . 16 SAE ARP5759 Page 4 of 24 1. SCOPE 1.1 Purpose This document discuss
18、es, 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
19、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 equipme
20、nt and personnel, and meeting local and legal noise requirements. 1.2 Beneficiaries This document is a compilation of input from several test cell designers, operators and users that summarizes the best practices and recommendations from these experts. This document is intended to benefit operators
21、and owners of engine test cells who are contemplating new facilities, refurbishment of existing facilities, and addition of new engine models to existing facilities. It is intended to aid these owners in understanding the basic terms, regulations, and concerns with engine test cell acoustics. It is
22、not intended that this document be an exhaustive design guide that any owner or contractor could independently accomplish the task of test cell acoustic design and installation. Rather, it is intended to provide a basic knowledge and understanding to operators and owners in the selection and evaluat
23、ion of acoustic designs and contractors. 1.3 Considerations and Consequences of Improper Acoustic Design/Installation When choosing a contractor for the design and installation of an acoustic solution for an engine test cell, potential risks and loss of productivity should be carefully considered. T
24、he consequences of an improperly selected, designed, or installed acoustic system can greatly vary in scope and impact to the customer. Schedule loss can impact and delay the facility ready for operation scheduling. Operational loss can directly create financial and reputation loss due to lost opera
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