Measured Far Field Flight Noise Of A Counterrotation Turboprop At Cruise Conditions
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Author | : National Aeronautics and Space Adm Nasa |
Publisher | : Independently Published |
Total Pages | : 36 |
Release | : 2019 |
Genre | : |
ISBN | : 9781792851841 |
Modern high speed propeller (advanced turboprop) aircraft are expected to operate on 50 to 60 percent less fuel than the 1980 vintage turbofan fleet while at the same time matching the flight speed and performance of those aircraft. Counterrotation turboprop engines offer additional fuel savings by means of upstream propeller swirl recovery. This paper presents acoustic sideline results for a full-scale counterrotation turboprop engine at cruise conditions. The engine was installed on a Boeing 727 aircraft in place of the right-side turbofan engine. Acoustic data were taken from an instrumented Learjet chase plane. Sideline acoustic results are presented for 0.50 and 0.72 Mach cruise conditions. A scale model of the engine propeller was tested in a wind tunnel at 0.72 Mach cruise conditions. The model data were adjusted to flight acquisition conditions and were in general agreement with the flight results. Woodward, Richard P. and Loeffler, Irvin J. and Dittmar, James H. Glenn Research Center NASA-TM-101383, E-4437, NAS 1.15:101383 RTOP 535-03-01...
Author | : |
Publisher | : |
Total Pages | : 24 |
Release | : 1989 |
Genre | : |
ISBN | : |
Author | : Richard P. Woodward |
Publisher | : |
Total Pages | : 161 |
Release | : 1993 |
Genre | : Airplanes |
ISBN | : |
Author | : |
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Total Pages | : 1572 |
Release | : 1992 |
Genre | : Aeronautics |
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Author | : |
Publisher | : |
Total Pages | : 704 |
Release | : 1990-07 |
Genre | : Pollution |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : 592 |
Release | : 1989 |
Genre | : Airplane sounds |
ISBN | : |
Author | : |
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Total Pages | : 1442 |
Release | : 1989 |
Genre | : Noise control |
ISBN | : |
Author | : Gerhard Müller |
Publisher | : Springer Science & Business Media |
Total Pages | : 704 |
Release | : 2012-11-06 |
Genre | : Science |
ISBN | : 3540694609 |
This acoustics handbook for mechanical and architectural applications is a translation of the German standard work on the subject. It not only describes the state of art of engineering acoustics but also gives practical help to engineers for solving acoustic problems. It deals with the origin, the transmission and the methods of abatement of air-borne and structure-borne sound of different kinds, from traffic to machinery and flow induced sound.
Author | : |
Publisher | : |
Total Pages | : 440 |
Release | : 1990 |
Genre | : Airplane sounds |
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Author | : |
Publisher | : |
Total Pages | : 1224 |
Release | : |
Genre | : Government publications |
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