Author: R. K. Matta
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 387
Book Description
This program was directed towards elements of combustor and turbine noise; the latter including turbine tone interaction with jet stream turbulence. Combustor (Core) Noise - Investigations were conducted to determine the variables affecting source strength, spectrum shape, and farfield directivity. This investigation include scale model tests to evaluate the effects of exhaust nozzle geometry on radiation patterns of low frequency noise. A full-scale combustor rig test was used to identify the controlling variables of combustor noise at the source. Two engine tests were run to validate the findings from the scale model tests and add to the overall data base of core noise measurements. The relationship between combustor source noise and emissions was studied and qualitative trends identified for advanced low emissions combustors. Turbine Noise - Studies were made of the attenuation of high frequency turbine noise by downstream blade rows, the broadband noise generation by turbines, and the controlling parameters for turbine tone/jet stream interaction. This included a turbine rig test in single and multistage configurations, along with a unique data acquisition system. Scale model tests were used to define the effect of the pertinent aero-acoustic parameters on turbine tone scattering by jet stream turbulence. The results of these investigations were used to improve the component prediction techniques derived under the Core Engine Noise Control Program (FAA-RD-74-125, III). These improved prediction techniques were used to predict the noise contribution of each source for high bypass turbofan engines representative of current and advanced technology. (Author).
GE Core Engine Noise Investigation - Low Emmission Engines
Author: R. K. Matta
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 387
Book Description
This program was directed towards elements of combustor and turbine noise; the latter including turbine tone interaction with jet stream turbulence. Combustor (Core) Noise - Investigations were conducted to determine the variables affecting source strength, spectrum shape, and farfield directivity. This investigation include scale model tests to evaluate the effects of exhaust nozzle geometry on radiation patterns of low frequency noise. A full-scale combustor rig test was used to identify the controlling variables of combustor noise at the source. Two engine tests were run to validate the findings from the scale model tests and add to the overall data base of core noise measurements. The relationship between combustor source noise and emissions was studied and qualitative trends identified for advanced low emissions combustors. Turbine Noise - Studies were made of the attenuation of high frequency turbine noise by downstream blade rows, the broadband noise generation by turbines, and the controlling parameters for turbine tone/jet stream interaction. This included a turbine rig test in single and multistage configurations, along with a unique data acquisition system. Scale model tests were used to define the effect of the pertinent aero-acoustic parameters on turbine tone scattering by jet stream turbulence. The results of these investigations were used to improve the component prediction techniques derived under the Core Engine Noise Control Program (FAA-RD-74-125, III). These improved prediction techniques were used to predict the noise contribution of each source for high bypass turbofan engines representative of current and advanced technology. (Author).
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 387
Book Description
This program was directed towards elements of combustor and turbine noise; the latter including turbine tone interaction with jet stream turbulence. Combustor (Core) Noise - Investigations were conducted to determine the variables affecting source strength, spectrum shape, and farfield directivity. This investigation include scale model tests to evaluate the effects of exhaust nozzle geometry on radiation patterns of low frequency noise. A full-scale combustor rig test was used to identify the controlling variables of combustor noise at the source. Two engine tests were run to validate the findings from the scale model tests and add to the overall data base of core noise measurements. The relationship between combustor source noise and emissions was studied and qualitative trends identified for advanced low emissions combustors. Turbine Noise - Studies were made of the attenuation of high frequency turbine noise by downstream blade rows, the broadband noise generation by turbines, and the controlling parameters for turbine tone/jet stream interaction. This included a turbine rig test in single and multistage configurations, along with a unique data acquisition system. Scale model tests were used to define the effect of the pertinent aero-acoustic parameters on turbine tone scattering by jet stream turbulence. The results of these investigations were used to improve the component prediction techniques derived under the Core Engine Noise Control Program (FAA-RD-74-125, III). These improved prediction techniques were used to predict the noise contribution of each source for high bypass turbofan engines representative of current and advanced technology. (Author).
GE Core Engine Noise Investigation - Low Emmission Engines
Author: R. K. Matta
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 392
Book Description
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 392
Book Description
GE Core Engine Noise Investigation
Author: R. K. Matta
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 372
Book Description
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 372
Book Description
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 994
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 994
Book Description
NASA Technical Paper
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 24
Book Description
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 24
Book Description
NASA Technical Memorandum
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 798
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 798
Book Description
Aircraft Noise
Author: Oleksandr Zaporozhets
Publisher: CRC Press
ISBN: 0203888820
Category : Technology & Engineering
Languages : en
Pages : 432
Book Description
Aircraft noise has adverse impacts on passengers, airport staff and people living near airports, it thus limits the capacity of regional and international airports throughout the world. Reducing perceived noise of aircraft involves reduction of noise at source, along the propagation path and at the receiver. Effective noise control demands highly s
Publisher: CRC Press
ISBN: 0203888820
Category : Technology & Engineering
Languages : en
Pages : 432
Book Description
Aircraft noise has adverse impacts on passengers, airport staff and people living near airports, it thus limits the capacity of regional and international airports throughout the world. Reducing perceived noise of aircraft involves reduction of noise at source, along the propagation path and at the receiver. Effective noise control demands highly s
Aeroacoustic Prediction Codes
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 324
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 324
Book Description
Combustion Noise
Author: Warren C. Strahle
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 84
Book Description
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 84
Book Description
Monthly Catalog of United States Government Publications
Author: United States. Superintendent of Documents
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1228
Book Description
February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1228
Book Description
February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index