Turbojet Engine Noise Reduction with Mixing Nozzle-ejector Combinations

Turbojet Engine Noise Reduction with Mixing Nozzle-ejector Combinations

Author: Willard D. Coles

Publisher:

ISBN: STANFORD:36105024832516

Category: Airplanes

Page: 33

View: 103

Download Now
Several noise suppressors consisting of combinations of mixing nozzles and ejectors were tested on two full-scale turbojet engines. Maximum sound pressure level reductions of 12 decibels and sound power level reductions of 8 decibels were obtained. The ejectors provided 3 to 5 decibels of the sound power reduction. The effects of ejector dimensions on noise suppression and engine performance were investigated. Ejector lengths of approximately 2.0 standard nozzle diameters and ejector diameters larger than 1.6 standard nozzle diameters provided the greatest additional noise reduction to that obtained with the mixing nozzles alone. The ejector can restore the static thrust loss caused by use of the mixing nozzle or can provide static-thrust augmentation.
Automotive Engineering e-Mega Reference
Language: en
Pages: 850
Authors: David Crolla
Categories: Technology & Engineering
Type: BOOK - Published: 2009-06-16 - Publisher: Butterworth-Heinemann

This one-stop Mega Reference eBook brings together the essential professional reference content from leading international contributors in the automotive field. An expansion the Automotive Engineering print edition, this fully searchable electronic reference book of 2500 pages delivers content to meet all the main information needs of engineers working in vehicle
Diesel Engine System Design
Language: en
Pages: 1088
Authors: Qianfan Xin
Categories: Technology & Engineering
Type: BOOK - Published: 2011-05-26 - Publisher: Elsevier

Diesel Engine System Design links everything diesel engineers need to know about engine performance and system design in order for them to master all the essential topics quickly and to solve practical design problems. Based on the author's unique experience in the field, it enables engineers to come up with
Transportation Noise and Noise from Equipment Powered by Internal Combustion Engines
Language: en
Pages: 413
Authors: Wyle Laboratories, United States. Office of Noise Abatement and Control
Categories: Airplanes
Type: BOOK - Published: 1972 - Publisher:

Books about Transportation Noise and Noise from Equipment Powered by Internal Combustion Engines
Transportation Noise and Noise from Equipment Powered by Internal Combustion Engines
Language: en
Pages: 13
Authors: United States. Environmental Protection Agency
Categories: Airplanes
Type: BOOK - Published: 1971 - Publisher:

Books about Transportation Noise and Noise from Equipment Powered by Internal Combustion Engines
How to Rebuild Big-Block Chevy Engines
Language: en
Pages: 160
Authors: Tom Wilson
Categories: Transportation
Type: BOOK - Published: 1987-01-01 - Publisher: Penguin

From workhorse to racehorse, the big-block Chevy provided the power demands of the mid-‘60s. used in everything from medium-duty trucks to Corvettes, these engines are worth rebuilding. Do it right with this book! Clear, concise text guides you through each engine-rebuilding step. Includes complete specifications and more than 500 photos,