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Author : Robert Wagner
Publisher :
ISBN 13 :
Total Pages : 228 pages
Book Rating : 4.:/5 (343 download)
Download or read book Aeroacoustics of the Bifurcated 2D Supersonic Inlet written by Robert Wagner and published by . This book was released on 1995 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781722970796
Total Pages : 136 pages
Book Rating : 4.9/5 (77 download)
Download or read book Comparison of the Aeroacoustics of Two Small-Scale Supersonic Inlets written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-17 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: An aerodynamic and acoustic investigation was performed on two small-scale supersonic inlets to determine which inlet would be more suitable for a High Speed Civil Transport (HSCT) aircraft during approach and takeoff flight conditions. The comparison was made between an axisymmetric supersonic P inlet and a bifurcated two-dimensional supersonic inlet. The 1/14 scale model supersonic inlets were used in conjunction with a 4.1 in (10.4 cm) turbofan engine simulator. A bellmouth was utilized on each inlet to eliminate lip separation commonly associated with airplane engine inlets that are tested under static conditions. Steady state measurements of the aerodynamic flowfield and acoustic farfield were made in order to evaluate the aeroacoustic performance of the inlets. The aerodynamic results show the total pressure recovery of the two inlets to be nearly identical, 99% at the approach condition and 98% at the takeoff condition. At the approach fan speed (60% design speed), there was no appreciable difference in the acoustic performance of either inlet over the entire 0 deg to 110 deg farfield measurement sector. The inlet flow field results at the takeoff fan speed (88% design speed), show the average inlet throat Mach number for the P inlet (Mach 0.52) to be approximately 2 times that of the 2D inlet (Mach 0.26). The difference in the throat Mach number is a result of the smaller throughflow area of the P inlet. This reduced area resulted in a 'soft choking' of the P inlet which lowered the tone and overall sound pressure levels of the simulator in the forward sector by an average of 9 dB and 3 dB, respectively, when compared to the 2D inlet. Ng, Wing Glenn Research Center AEROACOUSTICS; SUPERSONIC INLETS; ENGINE INLETS; AIRCRAFT ENGINES; FLOW DISTRIBUTION; FLOW MEASUREMENT; MACH NUMBER; INLET FLOW; SUPERSONIC TRANSPORTS; CIVIL AVIATION; TAKEOFF; APPROACH; TURBOFAN ENGINES; SCALE MODELS; SIMULATORS; SOUND PRESSURE; PRESSURE RECOVERY; FAR FIELDS; ACOUSTIC PROPERTIES...
Author : Mirko Čudina
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (439 download)
Download or read book Shi-Ming Li, Carol A. Hanuska and Wing Fai Ng: An experimental investigation of the aeroacoustics of a two-dimensional bifurcated supersonic inlet written by Mirko Čudina and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jeffrey D. Kozak
Publisher :
ISBN 13 :
Total Pages : 232 pages
Book Rating : 4.:/5 (341 download)
Download or read book 3-D Flow Calculations of a Bifurcated 2D Supersonic Engine Inlet at Takeoff written by Jeffrey D. Kozak and published by . This book was released on 1995 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781721941476
Total Pages : 210 pages
Book Rating : 4.9/5 (414 download)
Download or read book Supersonic Test of the 10-Inch Bifurcated Two-Stage Supersonic Inlet (Btssi) written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-27 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental results from testing of a novel supersonic inlet model in NASA Glenn Research Center's 10- by 10-foot supersonic wind tunnel are presented. The patented inlet concept, called Two-Stage Supersonic Inlet (TSSI), incorporates a large cavity, or throat slot, in the supersonic diffuser intended to enhance the stability of the normal shock. The present embodiment of the concept is a bifurcated twin-duct) design. During the course of testing an unusual 'semi-started' mode of operation was encountered. The inlet was able to spill up to 30 percent of the captured airstream without fully expelling the normal shock. In this mode, the total pressure recovery dropped approximately 6 percent without increasing steady-state distortion. Dynamic instrumentation at the cowl lip station indicates the semi-start mode may be a series of unstart/restart cycles with frequency ranging from 0.2 to 20 Hz. Engine face total pressure measurements indicate a modest impact due to this event. However, since the current test article does not have a representative subsonic diffuser (and is in fact separated), it is unclear how this mode of operation would effect an engine. Further investigation of this phenomenon is required before it is fully understood. Prior testing of the TSSI concept allowed extension of fully started inlet operation to regions of significantly reduced supply flow without reducing recovery. The test article was a smaller scale than the present test and was a single duct design. In the present test, the expanded range of stable operation with high recovery was not realized. Carlin, C. M. and Frisch, I. and Kolden, J. J. and Koncsek, J. L. and Marrs, K. J. and Mayer, D. W. and McMahon, S. L. and Milligan, K. H. and Sommerfield, D. M. Glenn Research Center NAS3-25963; WBS-22-714-01-38
Author :
Publisher :
ISBN 13 :
Total Pages : 212 pages
Book Rating : 4.:/5 (317 download)
Download or read book Supersonic Test of the 10-Inch Bifurcated Two-Stage Supersonic Inlet (BTSSI) written by and published by . This book was released on 2003 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Rudolf Hermann
Publisher :
ISBN 13 :
Total Pages : 412 pages
Book Rating : 4.:/5 (43 download)
Download or read book Supersonic Inlet Diffusers and Introduction to Internal Aerodynamics written by Rudolf Hermann and published by . This book was released on 1956 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Kevin C. Miller
Publisher :
ISBN 13 :
Total Pages : 248 pages
Book Rating : 4.:/5 (357 download)
Download or read book Comparison of the Aeroacoustics of Two Small-scale Supersonic Inlets written by Kevin C. Miller and published by . This book was released on 1996 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : T. W. Tsukahira
Publisher :
ISBN 13 :
Total Pages : 904 pages
Book Rating : 4.3/5 (91 download)
Download or read book Supersonic Inlet Investigation written by T. W. Tsukahira and published by . This book was released on 1971 with total page 904 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reported herein are the results of an investigation whose primary objective was to develop design criteria and performance tradeoffs for supersonic inlets applicable to advanced tactical aircraft. The objective was accomplished by conducting analysis and wind tunnel tests. The baseline models included a two-dimensional external compression inlet, a two-dimensional mixed compression inlet, and a half-axisymmetric external compression inlet. Alternate configurations for the external compression baseline inlets in the AEDC PWT-4T and VKF-A wind tunnels, respectively. The inlets were tested both isolated and in a non-uniform flow field, the later representing partial simulation of a vehicle flow field. Inlet steady state performance was characterized in terms of pressure recovery, pressure distortion, and turbulence levels at a simulated compressor face and immediately downstream of the inlet throat. In addition, detailed analysis and correlation of data obtained with high response dynamic instrumentation were made.
Author : Abhijit Pande
Publisher :
ISBN 13 :
Total Pages : 174 pages
Book Rating : 4.:/5 (322 download)
Download or read book Effect of Struts on Aeroacoustics of Axisymmetric Supersonic Inlets written by Abhijit Pande and published by . This book was released on 1994 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Abhijit Pande
Publisher :
ISBN 13 :
Total Pages : 174 pages
Book Rating : 4.:/5 (322 download)
Download or read book Effect of Struts on Aeroacoustics of Axisymmetric Supersonic Inlets written by Abhijit Pande and published by . This book was released on 1994 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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ISBN 13 :
Total Pages : 702 pages
Book Rating : 4.F/5 ( download)
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1997 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 702 pages
Book Rating : 4.:/5 (31 download)
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 1638 pages
Book Rating : 4.:/5 (31 download)
Download or read book Monthly Catalogue, United States Public Documents written by and published by . This book was released on 1995 with total page 1638 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 1632 pages
Book Rating : 4.3/5 ( download)
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1995 with total page 1632 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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ISBN 13 :
Total Pages : 500 pages
Book Rating : 4.E/5 ( download)
Download or read book Mechanics written by and published by . This book was released on 2002 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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ISBN 13 :
Total Pages : 488 pages
Book Rating : 4.:/5 (318 download)
Download or read book Journal of Aircraft written by and published by . This book was released on 1999 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:
