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Thursday, July 16, 2020 | History

4 edition of AST critical propulsion and noise reduction technologies for future commercial subsonic engines found in the catalog.

AST critical propulsion and noise reduction technologies for future commercial subsonic engines

AST critical propulsion and noise reduction technologies for future commercial subsonic engines

separate-flow exhaust system noise reduction concept evaluation

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  • 21 Currently reading

Published by National Aeronautics and Space Administration, Glenn Research Center, Available from NASA Center for Aerospace Information in [Cleveland, Ohio], Hanover, MD .
Written in English


Edition Notes

Other titlesSeparate-flow exhaust system noise reduction concept evaluation.
StatementB.A. Janardan ... [et al.].
Series[NASA contractor report] -- NASA/CR-2000-210039., NASA contractor report -- NASA CR-210039.
ContributionsJanardan, B. A., Gargione, Frank., NASA Glenn Research Center.
The Physical Object
FormatMicroform
Pagination1 v.
ID Numbers
Open LibraryOL17604934M
OCLC/WorldCa49946455

Supersonic Jet Noise Reduction Modern tactical aircraft engines and future propulsion concepts for supersonic transport aircraft produce intense noise familiar to anyone who has attended an airshow. Well beyond the annoyance to the general public, crewpersons on aircraft carriers must work for extended periods in the region of most intense.   Seminar Slide Deck (PDFMB) Abstract. The presentation will describe the current research and technology portfolio of the NASA Aeronautics Advanced Air Transport Technology (AATT) Project that addresses the Project's objectives of delivering revolutionary improvements in energy efficiency combined with dramatic reductions in harmful emissions and perceived noise of future .

revolutionary concepts and using advanced technologies for noise reduction. This project • Focus on propulsion system design (principal noise source at takeoff) • Multidisciplinary system design problem Fans per engines ' rR ' rC ' rW Total Noise (dB) Number of . The NASA-FAA-industry research program deals with technology for noise reduction that is implementable in this system context; that we have a long history of being able to do new research in technology and have it apply to noise in new aircraft and new propulsion systems that are also more efficient, more reliable, safer, and lead to affordable.

  Antimatter to ion drives: NASA's plans for deep space propulsion It's been 90 years since Robert Goddard’s first liquid-fuelled rocket test and they're still our best engines for traversing the. NOISE OF ADVANCED SUBSONIC AIR TRANSPORT Whereas fan and compressor noise generation is reasonably well understood and the state of the art on turbine noise is improving from day to day, one of the major areas of uncertainty is the noise emanating from the hot exhaust side of the engine. Approaches to future aircraft noise reduction Cited by: 2.


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AST critical propulsion and noise reduction technologies for future commercial subsonic engines Download PDF EPUB FB2

Get this from a library. AST critical propulsion and noise reduction technologies for future commercial subsonic engines: separate-flow exhaust system noise reduction concept evaluation.

[B A Janardan; Frank Gargione; NASA Glenn Research Center.;]. The current NASA ANR portfolio of propulsion noise reduction technologies is reviewed first. The primary propulsion noise focus has been maturing technologies for fan noise reduction, characterization of combustion noise, and development of more representative test beds for technologies.

For the future, the ANR portfolio willFile Size: 8MB. Improved NASA-ANOPP Noise Prediction Computer Code for Advanced Subsonic Propulsion Systems Volume 2: Fan Suppression Model Development K. Kontos, R. Kraft, and P.

Gliebe GE Aircraft Engines Cincinnati, OH December, Prepared for NASA Lewis Research Center Under Contract NAS Task Order Number 24File Size: 2MB. AST work involves development of concepts for reducing ozone-depleting nitrogen oxide emissions; and improving fuel consumption for future commercial aircraft engines.

* Composite Materials. Composites offer potential for reducing aircraft weight, hence cutting costs, but composites have so far been limited to secondary aircraft structures.

With propulsion systems for planes becoming electric, noise pollution from aircraft is expected to be significantly reduced. We decided to put the promise to. Tiny Engines, Big Rewards: short takeoff and landing vehicle concept with a distributed propulsion system was investigated to meet the growing future aviation market.

Breakthrough concepts that enable increased air traffic and performance and decreased noise are required for growing future aviation markets. Subsonic commercial concepts. Evaluation of the Advanced Subsonic Technology Program Noise Reduction Benefits [Golub, Robert a., Nasa Technical Reports Server (Ntrs), Et Al] on *FREE* shipping on qualifying offers.

Evaluation of the Advanced Subsonic Technology Program Noise Reduction BenefitsCited by: 6. Noise reduction technology included inlet, fan and core nozzle, and landing gear concepts. The subject of this paper, as part of a series of papers, is one fan nozzle noise reduction concept known as the Propulsion Airframe Aeroacoustics (PAA) T-fan nozzle.

As we look to the future, increasingly stringent civilian aviation noise regulations will require the design and manufacture of extremely quiet commercial aircraft.

Indeed, the noise goal for NASA's Aeronautics Enterprise calls for technologies that will help to provide a 20. Phase I of the HSR Program, which has been completed, focused on defining critical environmental compatibility requirements with regard to noise and emissions, Phase II, which will continue throughis concentrating on enabling propulsion materials, critical propulsion components, and propulsion system technology integration.

Subsonic Fixed Wing Project. 1 National Aeronautics and Space Administration. Propulsion Technologies for Future Aircraft Generations: Clean, Lean, Quiet, and Green.

Rubén Del Rosario. Project Manager, Subsonic Fixed Wing. NASA John H. Glenn Research Center. Cleveland, OH USA. 3rd UTIAS International Workshop on. InNASA initiated a seven-year program, the Advanced Subsonic Transport (AST) Noise Reduction Program, to develop technology to reduce jet transport noise by 10 dB relative to levels.

ultra-high-bypass engines. noise reduction technologies for fans, landing gears, and propulsion airframe aeroacoustics The National Academies. AST Critical Propulsion and Noise Reduction Technologies for Future Commercial Subsonic Engines Separate-Flow Exhaust System Noise Reduction Concept Evaluation NASA Report No.

CR Cited by: 8. The LEAP engines keep a conventional direct drive in a 2 spool system. The Pratt & Whitney geared turbofan (GTF in Figure 8) introduced a gear that permits the spool up of the low pressure turbine and therefore reduces the number of turbine stages required to drive the high bypass low pressure fan.A fuel burn evaluation of the PW Geared vs.

the LEAP configuration we conducted by a joint study Cited by: 7. The propulsion system is a key element to achieving these goals due to its major role with reducing emissions, fuel burn, and noise.

This report provides an in-depth description and assessment of propulsion systems and technologies considered in the N+3 subsonic vehicle : Paperback.

Supersonic Jet Noise Reduction Technologies for Gas Turbine Engines Article in Journal of Engineering for Gas Turbines and Power (10) October with 48 Reads How we measure 'reads'. NASA Advanced Air Vehicles Student Competition NASA invites students to propose ideas and designs for future aircraft that use less fuel, produce less harmful emissions, and make less noise.

Technical Area 2: Subsonic Commercial Transport Background The current generation of commercial aircraft benefit from past NASA investments in. A subsonic aircraft is an aircraft with a maximum speed less than the speed of sound (Mach 1).

The term technically describes an aircraft that flies below its critical Mach number, typically around Mach All current civil aircraft, including airliners, helicopters and airships, as. AST Critical Propulsion and Noise Reduction Technologies for Future Commercial Subsonic Engines: Separate-Flow Exhaust System Noise Reduction Concept Evaluation; Final Report,” NASA CR Cited by: 4.

Full text of "Advanced supersonic propulsion system technology study, phase 2" See other formats NASA CR ADVANCED SUPERSONIC PROPULSION 5 1 STEArl TEvHN^^LOw I STUD i PHASE n - FINAL REPORT??(>' ^e?7^ It— '^V' _, LLi I- CO ttrgS; R.D.

ALEIAN GENERAL ELECTRIC U1 H' • t3 O [D G- ^ o M ri- CD 9. To increase thrust, subsonic engines try to maximize mass flow (by increasing the bypass ratio) while supersonic engines rely more on increasing the nozzle speed (by using afterburners).

The core engines do not differ much - after all, the intake will make sure that air reaches the engine at a speed of Mach toregardless of flight speed.Jet engine - Jet engine - Ramjets and supersonic combustion ramjets: As has been seen, ram pressure plays an increasingly important role in the thermodynamic cycle of power and thrust generation of the jet engine at supersonic flight speeds.

For flight speeds above Mach or 3, the ram-pressure ratio becomes so high that a turbocompressor is no longer necessary for efficient thrust generation.critical propulsion and nois e reduction technologies for future commerci al subsonic engines separate-flow exhaust system noise reduction concept evaluation,” NASA/CR— ().