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Acoustic Performance Of Two 183 Meter Diameter Fans Designed For A Wind Tunnel Drive System
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Book Synopsis Acoustic Performance of Two 1.83-meter-diameter Fans Designed for a Wind-tunnel Drive System by : Paul R. Soderman
Download or read book Acoustic Performance of Two 1.83-meter-diameter Fans Designed for a Wind-tunnel Drive System written by Paul R. Soderman and published by . This book was released on 1977 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Acoustic performance of two 1.83-meter-diameter fans designed for a wind-tunnel drive system by : Paul R. Soderman
Download or read book Acoustic performance of two 1.83-meter-diameter fans designed for a wind-tunnel drive system written by Paul R. Soderman and published by . This book was released on 1977 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Aerodynamic Investigation of Two 1.83-meter-diameter Fan Systems Designed to Drive a Subsonic Wind Tunnel by :
Download or read book An Aerodynamic Investigation of Two 1.83-meter-diameter Fan Systems Designed to Drive a Subsonic Wind Tunnel written by and published by . This book was released on 1977 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis NASA Scientific and Technical Publications by :
Download or read book NASA Scientific and Technical Publications written by and published by . This book was released on 1987 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781719500616 Total Pages :60 pages Book Rating :4.5/5 (6 download)
Book Synopsis Acoustic Performance of an Advanced Model Turbofan in Three Aeroacoustic Test Facilities by : National Aeronautics and Space Administration (NASA)
Download or read book Acoustic Performance of an Advanced Model Turbofan in Three Aeroacoustic Test Facilities written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-05-22 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: A model advanced turbofan was acoustically tested in the NASA Glenn 9- by 15-Foot-Low-Speed Wind Tunnel (LSWT), and in two other aeroacoustic facilities. The Universal Propulsion Simulator (UPS) fan was designed and manufactured by the General Electric Aircraft Engines (GEAE) Company, and featured active core, as well as bypass, flow paths. The reference test configurations were with the metal, M4, rotor with hardwall and treated bypass flow ducts. The UPS fan was tested within an airflow at a Mach number of 0.20 (limited flow data were also acquired at a Mach number of 0.25) which is representative of aircraft takeoff and approach conditions. Comparisons were made between data acquired within the airflow (9x15 LSWT and German-Dutch Wind Tunnel (DNW)) and outside of a free jet (Boeing Low Speed Aero acoustic Facility (LSAF) and DNW). Sideline data were acquired on an 89-in. (nominal 4 fan diameters) sideline using the same microphone assembly and holder in the 9x15 LSWT and DNW facilities. These data showed good agreement for similar UPS operating conditions and configurations. Distortion of fan spectra tonal content through a free jet shear layer was documented, suggesting that in-flow acoustic measurements are required for comprehensive fan noise diagnostics. However, there was good agreement for overall sound power level (PWL) fan noise measurements made both within and outside of the test facility airflow. Woodward, Richard P. and Hughes, Christopher E. Glenn Research Center ACOUSTIC MEASUREMENT; AEROACOUSTICS; LOW SPEED WIND TUNNELS; TEST FACILITIES; TURBOFANS; WIND TUNNEL TESTS; AIRCRAFT MODELS; SIMULATORS; NOISE REDUCTION; SHEAR LAYERS; FREE JETS; FAN BLADES; AIR FLOW
Book Synopsis Acoustic Performance of an Advanced Model Turbofan in Three Aeroacoustic Test Facilities by : Nasa Technical Reports Server (Ntrs)
Download or read book Acoustic Performance of an Advanced Model Turbofan in Three Aeroacoustic Test Facilities written by Nasa Technical Reports Server (Ntrs) and published by BiblioGov. This book was released on 2013-07 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: A model advanced turbofan was acoustically tested in the NASA Glenn 9- by 15-Foot-Low-Speed Wind Tunnel (LSWT), and in two other aeroacoustic facilities. The Universal Propulsion Simulator (UPS) fan was designed and manufactured by the General Electric Aircraft Engines (GEAE) Company, and featured active core, as well as bypass, flow paths. The reference test configurations were with the metal, M4, rotor with hardwall and treated bypass flow ducts. The UPS fan was tested within an airflow at a Mach number of 0.20 (limited flow data were also acquired at a Mach number of 0.25) which is representative of aircraft takeoff and approach conditions. Comparisons were made between data acquired within the airflow (9x15 LSWT and German-Dutch Wind Tunnel (DNW)) and outside of a free jet (Boeing Low Speed Aero acoustic Facility (LSAF) and DNW). Sideline data were acquired on an 89-in. (nominal 4 fan diameters) sideline using the same microphone assembly and holder in the 9x15 LSWT and DNW facilities. These data showed good agreement for similar UPS operating conditions and configurations. Distortion of fan spectra tonal content through a free jet shear layer was documented, suggesting that in-flow acoustic measurements are required for comprehensive fan noise diagnostics. However, there was good agreement for overall sound power level (PWL) fan noise measurements made both within and outside of the test facility airflow.
Book Synopsis Acoustic Performance of the Geae Ups Research Fan in the Nasa Glenn 9- by 15-Foot Low-Speed Wind Tunnel by : Nasa Technical Reports Server (Ntrs)
Download or read book Acoustic Performance of the Geae Ups Research Fan in the Nasa Glenn 9- by 15-Foot Low-Speed Wind Tunnel written by Nasa Technical Reports Server (Ntrs) and published by BiblioGov. This book was released on 2013-07 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: A model advanced turbofan was acoustically tested in the NASA Glenn 9- by 15-Foot Low-Speed Wind Tunnel in 1994. The Universal Propulsion Simulator fan was designed and manufactured by General Electric Aircraft Engines, and included an active core, as well as bypass, flow paths. The fan was tested with several rotors featuring unswept, forward-swept and aft-swept designs of both metal and composite construction. Sideline acoustic data were taken with both hard and acoustically treated walls in the flow passages. The fan was tested within an airflow at a Mach number of 0.20, which is representative of aircraft takeoff/approach conditions. All rotors showed similar aerodynamic performance. However, the composite rotors typically showed higher noise levels than did corresponding metal rotors. Aft and forward rotor sweep showed at most modest reductions of transonic multiple pure tone levels. However, rotor sweep often introduced increased rotor-stator interaction tone levels. Broadband noise was typically higher for the composite rotors and also for the aft-swept metal rotor. Transonic MPT generation was reduced with increasing fan axis angle of attack (AOA); however, higher downstream noise levels did increase with AOA resulting in higher overall Effective Perceived Noise Level.
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781719500500 Total Pages :80 pages Book Rating :4.5/5 (5 download)
Book Synopsis Acoustic Performance of the Geae Ups Research Fan in the NASA Glenn 9- By 15-Foot Low-Speed Wind Tunnel by : National Aeronautics and Space Administration (NASA)
Download or read book Acoustic Performance of the Geae Ups Research Fan in the NASA Glenn 9- By 15-Foot Low-Speed Wind Tunnel written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-05-22 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: A model advanced turbofan was acoustically tested in the NASA Glenn 9- by 15-Foot Low-Speed Wind Tunnel in 1994. The Universal Propulsion Simulator fan was designed and manufactured by General Electric Aircraft Engines, and included an active core, as well as bypass, flow paths. The fan was tested with several rotors featuring unswept, forward-swept and aft-swept designs of both metal and composite construction. Sideline acoustic data were taken with both hard and acoustically treated walls in the flow passages. The fan was tested within an airflow at a Mach number of 0.20, which is representative of aircraft takeoff/approach conditions. All rotors showed similar aerodynamic performance. However, the composite rotors typically showed higher noise levels than did corresponding metal rotors. Aft and forward rotor sweep showed at most modest reductions of transonic multiple pure tone levels. However, rotor sweep often introduced increased rotor-stator interaction tone levels. Broadband noise was typically higher for the composite rotors and also for the aft-swept metal rotor. Transonic MPT generation was reduced with increasing fan axis angle of attack (AOA); however, higher downstream noise levels did increase with AOA resulting in higher overall Effective Perceived Noise Level. Woodward, Richard P. and Hughes, Christopher E. Glenn Research Center ACOUSTIC PROPERTIES; NOISE INTENSITY; AERODYNAMIC CHARACTERISTICS; MACH NUMBER; ANGLE OF ATTACK; AIR FLOW; WIND TUNNEL MODELS; WIND TUNNEL TESTS
Book Synopsis Acoustic and Aerodynamic Performance of a 1.83-meter- (6-ft-) Diameter 1.2-pressure-ratio Fan (QF-6) by : Richard P. Woodward
Download or read book Acoustic and Aerodynamic Performance of a 1.83-meter- (6-ft-) Diameter 1.2-pressure-ratio Fan (QF-6) written by Richard P. Woodward and published by . This book was released on 1974 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Acoustic and Aerodynamic Performance of 1.83-meter (6-ft) Diameter 1.25-pressure-ratio Fan (QF-8) by : Richard P. Woodward
Download or read book Acoustic and Aerodynamic Performance of 1.83-meter (6-ft) Diameter 1.25-pressure-ratio Fan (QF-8) written by Richard P. Woodward and published by . This book was released on 1976 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aero-acoustic Experimental Verification of Optimum Configuration of Variable-pitch Fans for 40 X 80 Foot Subsonic Wind Tunnel by :
Download or read book Aero-acoustic Experimental Verification of Optimum Configuration of Variable-pitch Fans for 40 X 80 Foot Subsonic Wind Tunnel written by and published by . This book was released on 1977 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA SP. written by and published by . This book was released on 1962 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Acoustic and aerodynamic performance of a 1.5-pressure-ratio, 1.83-meter (6-ft) diameter fan stage for turbofan engines (QF-2) by : Richard P. Woodward
Download or read book Acoustic and aerodynamic performance of a 1.5-pressure-ratio, 1.83-meter (6-ft) diameter fan stage for turbofan engines (QF-2) written by Richard P. Woodward and published by . This book was released on 1977 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Acoustic and Aerodynamic Performance of a Variable-pitch 1.83-meter- (6-ft) Diameter 1.20-pressure-ratio Fan Stage (qf-9) by : Frederick W. Glaser
Download or read book Acoustic and Aerodynamic Performance of a Variable-pitch 1.83-meter- (6-ft) Diameter 1.20-pressure-ratio Fan Stage (qf-9) written by Frederick W. Glaser and published by . This book was released on 1977 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1978 with total page 1130 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
Book Synopsis Low-Speed Wind Tunnel Testing by : Jewel B. Barlow
Download or read book Low-Speed Wind Tunnel Testing written by Jewel B. Barlow and published by John Wiley & Sons. This book was released on 1999-02-22 with total page 738 pages. Available in PDF, EPUB and Kindle. Book excerpt: A brand-new edition of the classic guide on low-speed wind tunnel testing While great advances in theoretical and computational methods have been made in recent years, low-speed wind tunnel testing remains essential for obtaining the full range of data needed to guide detailed design decisions for many practical engineering problems. This long-awaited Third Edition of William H. Rae, Jr.'s landmark reference brings together essential information on all aspects of low-speed wind tunnel design, analysis, testing, and instrumentation in one easy-to-use resource. Written by authors who are among the most respected wind tunnel engineers in the world, this edition has been updated to address current topics and applications, and includes coverage of digital electronics, new instrumentation, video and photographic methods, pressure-sensitive paint, and liquid crystal-based measurement methods. The book is organized for quick access to topics of interest, and examines basic test techniques and objectives of modeling and testing aircraft designs in low-speed wind tunnels, as well as applications to fluid motion analysis, automobiles, marine vessels, buildings, bridges, and other structures subject to wind loading. Supplemented with real-world examples throughout, Low-Speed Wind Tunnel Testing, Third Edition is an indispensable resource for aerospace engineering students and professionals, engineers and researchers in the automotive industries, wind tunnel designers, architects, and others who need to get the most from low-speed wind tunnel technology and experiments in their work.
Download or read book Paper written by and published by . This book was released on 1981 with total page 808 pages. Available in PDF, EPUB and Kindle. Book excerpt:
