Author: Publisher:
ISBN:
Category : Aerodynamic noise
Languages : en
Pages : 127
Book Description
Investigation of Coannular Nozzles with Conventional and Inverted Velocity Profiles
Author: Investigation of Coannular Nozzles with Conventional and Inverted Velocity Profiles
Author: Publisher:
ISBN:
Category : Jet planes
Languages : en
Pages : 127
Book Description
The results of the investigation of the noise characteristics of the exhaust jets from coannular nozzles with conventional and inverted velocity profiles are presented. Experiments were carried out on a series of coannular nozzles of equal primary and secondary area. The majority of acoustic tests were carried out holding either the total thrust or the total mass flow constant while varying the rates of secondary velocity to primary velocity. A limited number of tests were also made simulating the takeoff, cutback and approach conditions of the JT8D engine and corresponding inverted conditions. The results of this study show that at high thrust level the coannular flows with inverted velocity profiles are quieter than those with standard velocity profiles at the same thrust and the same mass flow. The acoustic differences are much greater when the velocity ratio is produced by differences in the stagnation temperature rather than by differences in the stagnation pressure. (Author).
Acoustic and Aerodynamic Performance Investigation of Inverted Velocity Profile Coannular Plug Nozzles
Author: P. R. KnottAerodynamic and Acoustic Investigation of Inverted Velocity Profile Coannular Exhaust Nozzle Models and Development of Aerodynamic and Acoustic Prediction Procedures
Author: Richard S. LarsonPublisher:
ISBN:
Category : Exhaust nozzles
Languages : en
Pages : 228
Book Description
Scientific and Technical Aerospace Reports
Author: Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1370
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Acoustic and Aerodynamic Performance Investigation of Inverted Velocity Profile Connualar Plug Nozzles
Author: Paul R. KnottPublisher:
ISBN:
Category : Aerodynamic noise
Languages : en
Pages : 252
Book Description
Aerodynamic and Acoustic Investigation of Inverted Velocity Profile Coannular Exhaust Nozzle Models and Development of Aerodynamic and Acoustic Prediction Procedures
Author: Richard S. LarsonPublisher:
ISBN:
Category : Supersonic nozzles
Languages : en
Pages : 228
Book Description
NASA Reference Publication
Author: Flight Effects on the Aerodynamic and Acoustic Characteristics of Inverted Profile Coannular Nozzles
Author: Hilary KozlowskiPublisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 204
Book Description
Author: