Author: D. L. Smith
Publisher:
ISBN:
Category :
Languages : en
Pages : 77
Book Description
A computer program is presented for calculating the sound pressure level (SPL) in the jet near field which accounts for ground reflection and multiple engine operation. The prediction method is a modification of the semi-empirical technique presented in AFFDL TR-67-43 'Near Field Noise Analysis of Aircraft Propulsion Systems with emphasis on Prediction Techniques for Jets'. The modifications in addition to accounting for ground reflection allow the prediction of the SPL for the overall and three octave bands at any point in the field and require data inputs of jet exit temperature, Mach number and diameter. A brief description is presented of a noise measurement program conducted on the XB-70 aircraft during which one-third octave band noise spectra were obtained for a range of engine conditions and for various combinations of linear arrays of engines.
Near Field Noise Prediction for a Linear Array of Turbojet Engines
Author: D. L. Smith
Publisher:
ISBN:
Category :
Languages : en
Pages : 77
Book Description
A computer program is presented for calculating the sound pressure level (SPL) in the jet near field which accounts for ground reflection and multiple engine operation. The prediction method is a modification of the semi-empirical technique presented in AFFDL TR-67-43 'Near Field Noise Analysis of Aircraft Propulsion Systems with emphasis on Prediction Techniques for Jets'. The modifications in addition to accounting for ground reflection allow the prediction of the SPL for the overall and three octave bands at any point in the field and require data inputs of jet exit temperature, Mach number and diameter. A brief description is presented of a noise measurement program conducted on the XB-70 aircraft during which one-third octave band noise spectra were obtained for a range of engine conditions and for various combinations of linear arrays of engines.
Publisher:
ISBN:
Category :
Languages : en
Pages : 77
Book Description
A computer program is presented for calculating the sound pressure level (SPL) in the jet near field which accounts for ground reflection and multiple engine operation. The prediction method is a modification of the semi-empirical technique presented in AFFDL TR-67-43 'Near Field Noise Analysis of Aircraft Propulsion Systems with emphasis on Prediction Techniques for Jets'. The modifications in addition to accounting for ground reflection allow the prediction of the SPL for the overall and three octave bands at any point in the field and require data inputs of jet exit temperature, Mach number and diameter. A brief description is presented of a noise measurement program conducted on the XB-70 aircraft during which one-third octave band noise spectra were obtained for a range of engine conditions and for various combinations of linear arrays of engines.
Near Field Noise Prediction for a linear array of turbojet
Scientific and Technical Aerospace Reports
Technical Information Indexes
Author: United States. Naval Air Systems Command
Publisher:
ISBN:
Category : Aeronautics, Military
Languages : en
Pages : 276
Book Description
Publisher:
ISBN:
Category : Aeronautics, Military
Languages : en
Pages : 276
Book Description
Federal Aircraft Noise Abatement Plan
Author:
Publisher:
ISBN:
Category : Aeronautics, Commercial
Languages : en
Pages : 338
Book Description
Publisher:
ISBN:
Category : Aeronautics, Commercial
Languages : en
Pages : 338
Book Description
Federal Aircraft Noise Abatement Plan
Author: United States. Office of Noise Abatement
Publisher:
ISBN:
Category : Aerodynamic noise
Languages : en
Pages : 88
Book Description
Publisher:
ISBN:
Category : Aerodynamic noise
Languages : en
Pages : 88
Book Description
First Federal Aircraft Noise Abatement Plan (FY 1969-70)
Author: United States. Office of Noise Abatement
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 84
Book Description
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 84
Book Description
Federal Aircraft Noise Abatement Program
Noise Predictions of a High Bypass Turbofan Engine Using the Lockheed Near-Field Noise Prediction Program
An International Survey of Shock and Vibration Technology
Author: Henry C. Pusey
Publisher:
ISBN:
Category : Shock (Mechanics)
Languages : en
Pages : 476
Book Description
Publisher:
ISBN:
Category : Shock (Mechanics)
Languages : en
Pages : 476
Book Description