Semiempirical Airframe Noise Prediction Model and Evaluation with Flight Data PDF Download
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 40
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 40
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 40
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Book Description
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 40
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 440
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Book Description
Author: National Aeronautics and Space Adm Nasa
Publisher: Independently Published
ISBN: 9781730923272
Category : Science
Languages : en
Pages : 94
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Book Description
The objective of this study is to evaluate the accuracy and adequacy of current airframe noise prediction methods using available airframe noise measurements from tests of a narrow body transport (DC-9) and a wide body transport (DC-10) in addition to scale model test data. General features of the airframe noise from these aircraft and models are outlined. The results of the assessment of two airframe prediction methods, Fink's and Munson's methods, against flight test data of these aircraft and scale model wind tunnel test data are presented. These methods were extensively evaluated against measured data from several configurations including clean, slat deployed, landing gear-deployed, flap deployed, and landing configurations of both DC-9 and DC-10. They were also assessed against a limited number of configurations of scale models. The evaluation was conducted in terms of overall sound pressure level (OASPL), tone corrected perceived noise level (PNLT), and one-third-octave band sound pressure level (SPL). Yamamoto, Kingo J. and Donelson, Michael J. and Huang, Shumei C. and Joshi, Mahendra C. Unspecified Center...
Author: Kingo J. Yamamoto
Publisher:
ISBN:
Category : Airframes
Languages : en
Pages : 96
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Book Description
Author:
Publisher:
ISBN:
Category : Airframes
Languages : en
Pages : 40
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Book Description
Author: Oleksandr Zaporozhets
Publisher: CRC Press
ISBN: 0415240662
Category : Technology & Engineering
Languages : en
Pages : 435
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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 skilled and knowledgeable engineers. This book is for them. It shows you how accurate and reliable information about aircraft noise levels can be gained by calculations using appropriate generation and propagation models, or by measurements with effective monitoring systems. It also explains how to allow for atmospheric conditions, natural and artificial topography as well as detailing necessary measurement techniques.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 654
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Book Description
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781720504788
Category :
Languages : en
Pages : 38
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Book Description
This report documents a semi-empirical/semi-analytical method for landing gear noise prediction. The method is based on scaling laws of the theory of aerodynamic noise generation and correlation of these scaling laws with current available test data. The former gives the method a sound theoretical foundation and the latter quantitatively determines the relations between the parameters of the landing gear assembly and the far field noise, enabling practical predictions of aircraft landing gear noise, both for parametric trends and for absolute noise levels. The prediction model is validated by wind tunnel test data for an isolated Boeing 737 landing gear and by flight data for the Boeing 777 airplane. In both cases, the predictions agree well with data, both in parametric trends and in absolute noise levels.Golub, Robert A. (Technical Monitor) and Guo, Yue-PingLangley Research CenterMATHEMATICAL MODELS; ANALYSIS (MATHEMATICS); LANDING GEAR; NOISE PREDICTION; AERODYNAMIC NOISE; WIND TUNNEL TESTS; NOISE INTENSITY; NOISE GENERATORS; BOEING 777 AIRCRAFT; BOEING 737 AIRCRAFT
