Download or read book Supersonic Transport Noise Reduction Technology Program Phase II written by S. B. Kazin and published by . This book was released on 1975 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Supersonic Transport Noise Reduction Technology Program, sponsored by the Federal Aviation Administration, was conducted as a follow-on effort after cancellation of the SST Program to finalize selected noise technology areas and summarize results of the SST Program. Using initial effects of the SST Program, as summarized in Phase I of The Supersonic Transport Noise Reduction Technology Program, the Phase II contract was issued to the General Electric Company (and Boeing) to continue this important work. The overall program objective was to provide additional acoustic technology necessary, to design high speed aircraft systems, recognizing future acceptable noise levels. General Electric's effort was divided into the acoustic technology areas of jet noise reduction, turbomachinery noise reduction, and aircraft system integration. Jet noise reduction technology work was achieved through analytical studies, model tests, and J79 engine tests. Selected suppression systems identified during the SST Program were further refined (multispoke/chute suppressors or annular plug nozzles). Novel advanced concepts of suppression were identified, and extensive aerodynamic (static and wind-on) performance tests and hot-jet acoustic tests were performed.

Download or read book Commercial Supersonic Transport Program Phase Ii a Comprehensive Report Volume Xiv a Aircraft System Concept written by BOEING CO RENTON WA AIRPLANE DIV. and published by . This book was released on 1964 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: The improved performance location of the engines reduces engine exhaust noise on the tail and fuselage, while virtually eliminating noise impingement on the wing. Sound suppression techniques are used and the structure is designed to be fully capable of coping with the temperature and noise for the design life of the airplane, even with occasional hot-day augmented operation under static and takeoff conditions. Passengers are located completely ahead of the engine exhaust nozzle noise cone. The aerodynamic pitchup tendency at high-angles-of-attack has been resolved in wind tunnel tests at both NASA Ames and Boeing. Risk of engine ingestion of debris and slush is eliminated by the use of deflectors and by providing greater distance between inlet and ground. Distribution of hydraulic system power to the control surfaces is balanced so that any failure of a power system does not result in asymmetric control surface operation. Spring-actuated mechanical locks are provided on the aileron and rudder control surfaces to prevent flutter in the event of hydraulic powr failure. Primary flight control system complexity has been reduced. Formal design reviews, system mockups, an extensive equipment quality analysis program, and an integrated test plan using large developmental test rigs provide early detection of problems and permit verification of system operation through prompt revision and refinement.

Download or read book Supersonic Transport Noise Reduction Technology Summary Phase 1 Summary of GE4 SST Acoustic Suppression Research written by and published by . This book was released on 1972 with total page 787 pages. Available in PDF, EPUB and Kindle. Book excerpt: A development program for a commercial supersonic aircraft and engines was sponsored by the Federal Aviation Administration during a five-year period from 1966 through 1971. The unique propulsion system, an afterburning turbojet, required acoustic suppression techniques to reduce its noise levels to those federally regulated for subsonic aircraft. An acoustic suppression research program was conducted by the General Electric Company to develop technology applicable to prototype and commercial supersonic engines. Primary emphasis was on jet noise suppressor development through model and engine testing. Various systems were studied including ejector pumping, simple mechanical primary and secondary suppressors, fluid injectants, multi-element tube nozzles, acoustically treated ejectors, highly segmented annular plug nozzles, etc. A research study on fundamental jet noise generation and reduction mechanisms was conducted at the General Electric Corporate Research and Development Center. In addition, investigatory tests were conducted for identification of total system noise. Application of a choked inlet and an open A sub 8 exhaust cycle were studied for noise reduction. Source turbomachinery noise generation and suppression through treatment application were investigated. This report summarizes the acoustic and aerodynamic technology with emphasis toward development of guidelines for future applications.

Download or read book Commercial Supersonic Transport Program Phase Ii a Comprehensive Report Volume Iv a Book 1 Design Status Report written by BOEING CO RENTON WA AIRPLANE DIV. and published by . This book was released on 1964 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents: Management; Aircraft System Concept; Sonic Boom and Noise; Aerodynamics; and Airframe Design.

Download or read book COMMERCIAL SUPERSONIC TRANSPORT PROGRAM PHASE 2 A COMPREHENSIVE REPORT VOLUME 7 A SONIC BOOM AND NOISE written by and published by . This book was released on 1964 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Boeing Company has submitted for Phase II-A evaluation an airplane design, which, in its intercontinental and domestic versions, will provide economical supersonic transports meeting the diverse requirements of various operators and also meeting the design objectives of the FAA. The two models of the airplane are identical in all respects except for operational empty weight and maximum gross weight. Both the domestic and intercontinental versions meet or are lower than all noise objectives established by the FAA. Notable progress has been made during Phase II-A toward developing a supersonic transport that has both interior and exterior noise levels lower than present subsonic airplanes. Significant configuration changes from the Phase I proposal that have contributed to improvement are: (1) Development of engine inlet and nozzle noise suppression techniques with no performance penalty; and (2) Relocation of engines aft on the wing to reduce engine noise heard in the cabin. These changes, coupled with test-proven structural design concepts, will ensure a 50,000-hour fatigue life for the airplane with minimum weight penalty. This document presents the substantiating data for sonic boom, engine noise, interior noise, and sonic fatigue effect on structures.

Download or read book Supersonic Transport Noise Reduction Technology Summary Phase I written by W. S. Fisk and published by . This book was released on 1972 with total page 529 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies were performed to conclude and refine elements of work begun under the Supersonic Transport Engine Development Program. Three programs were completed in the area of turbomachinery noise: the screening of proposed materials for high temperature acoustic treatment and the extension of suppression design methods to the flows and temperatures typical of turbine exhaust conditions; investigations of multi-stage compressor tip treatment using multiple circumferential grooves; and the prediction and demonstration of the effects of increased turbine axial spacing on noise generation. Detailed analytical studies were made of data from conic and suppressor-type jets, both cold and hot flows, selected from the GE4/SST program. Correlations of aero/acoustic interrelationships were made, and elements of the noise generation mechanisms showing promise for future advanced concepts were identified. Scaling of small model jet noise data to engine size was established, using scaling techniques and accounting for site differences and the added sources present in engine data. (Author).

Download or read book Supersonic Transport Noise Reduction Technology Summary Phase 1 Summary of GE4 SST Acoustic Suppression Research written by and published by . This book was released on 1972 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents: Jet Noise Suppressor Configurations and Parametric Studies (Concluded) -- Acoustic ejectors on tube and conical nozzles, and Annular plug nozzle suppressor model studies; System studies -- Choked inlet - GE4 engine, Exhust nozzle open area schedule - GE4 Engine, and Tubomachinery noise on GE4 engine; General Electric Corporate Research and Development Center's Fundamental Jet Noise Work -- Supersonic jet noise suppression results and prediction methods.

Download or read book Notices of Changes in Classification Distribution and Availability written by and published by . This book was released on 1977 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Noise Source Abatement Technology and Cost Analysis Including Retrofitting written by William C. Sperry and published by . This book was released on 1973 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Quantitative Assessment of Advanced Take off Trajectories for Supersonic Transport Noise Reduction written by Laurens Jozef Amandine Voet and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis (a) establishes the design trades and limitations of supersonic transport propulsion systems in terms of take-off noise reduction, (b) identifies the attributes, quantifies the potential, and assesses the impact of advanced take-off trajectories designed for noise reduction, and (c) formulates a reduced-order model to scale these results for supersonic transport of different size classes and cruise Mach numbers. The propulsion system design trades established in this thesis show that clean- sheet engines do not enable supersonic transport to meet current subsonic transport noise limits when using conventional take-off trajectories. The impact of derivative engines on the cumulative noise levels is found to be small (1.4 EPNdB). In fact, regardless of whether a clean-sheet or derivative engine is selected, a Mach 1.4 business jet is shown to exceed the current cumulative noise limit by at least 15.5 EPNdB. Further noise reduction of the jet noise dominant engines is prevented by the fan size constraint imposed to limit wave drag during supersonic cruise. Advanced trajectories are proposed to reduce take-off noise by capitalizing on excess engine thrust and improved aerodynamic efficiency at higher take-off speeds. These novel trajectories use (i) automatic continuous control of thrust and high-lift devices, (ii) increased take-off speed, and (iii) reduced cut-back altitude, compared to conventional trajectories currently used for subsonic transport. For the aircraft examined, although these trajectories reduce the 65 dB-A community noise contour area by 63.8%, they only reduce cumulative certification noise by 10.6 EPNdB, which is insufficient to meet current subsonic transport noise limits. Additionally, advanced trajectories with the lowest community noise do not yield the lowest certification noise, which warrants re-examination of supersonic transport noise standards. On the contrary, engine NO[subscript x] standards are representative for supersonic transport using advanced take-off trajectories and thus do not need to be modified, as the impact of these trajectories on the mass of NO[subscript x] emissions during climb-out is small (16.1%). Last, a first-of-its-kind reduced-order model for supersonic transport take-off noise scaling shows that, as cruise Mach number increases, supersonic transport take-off noise levels increase while the thrust cut-back noise reduction potential decreases. This scaling rule enables equally stringent standard setting for noise certification of supersonic transport across a broad range of size classes and cruise Mach numbers.

Download or read book SST Technology Follow On Program Phase II Noise Suppressor Nozzle Development Volume X Advanced Suppressor Concepts and Full Scale Tests written by R. S. Armstrong and published by . This book was released on 1975 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this program was to develop and demonstrate an engine exhaust system suitable for use on a commercial supersonic transport which would allow the airplane to meet FAR Part 36 takeoff and sideline noise requirements. A series of model-scale jet noise suppressor test programs and a design feasibility study were conducted to identify the exhaust system design which would meet this goal. A model-scale test and a full-scale test of a boilerplate version of the final design were conducted statically to demonstrate thrust performance and noise suppression characteristics. Full-scale test results were limited to a jet velocity of 2300 fps due to engine operating limits, while model-scale results were extended beyond the design velocity of 2550 fps. The full-scale suppressor system test achieved 15.8 PNdB sideline jet noise reduction for 0.75% static gross thrust loss at v sub j = 2300 fps. Model-scale tests of the same system show that the jet noise suppression should increase to 16.8 PNdB at v sub j - 2550 fps. Forward flight effects during climb-out are predicted to degrade the suppressor performance to a value of 15 PNdB noise reduction for 7% net thrust loss. Consequently, it is shown that the application of such a suppressor system to the Boeing B2707-300 SST configuration would achieve FAR Part 36 sideline noise levels. Further, it is shown that such an installation would allow an approximately 7.5% increase in the airplane's maximum takeoff weight, thereby improving its economic and mission flexibility. (Author).

Download or read book Commercial Supersonic Transport Program Phase Ii a Comprehensive Report Volume Xviii a Training Plans written by BOEING CO RENTON WA AIRPLANE DIV. and published by . This book was released on 1964 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: These studies show that there is a need for further and more extensive aircrew flight training than was proposed in Phase I. Specifically, the flight time has been increased from 14 hours to 24 hours. The flight engineer's course flight schedule is increased from 14 hours to 18 hours. The airlines are currently making encouraging progress in their efforts to demonstrate that significant reductions in flight training hours can be achieved through the use of improved simulator effectiveness and training techniques. SST training flight time may ultimately be reduced by these improved techniques.

Download or read book Commercial Supersonic Transport Program Phase Ii a Comprehensive Report Volume Xvii a Ground Operation written by BOEING CO RENTON WA AIRPLANE DIV. and published by . This book was released on 1964 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: Improvements in airplane configuration from the Phase I model 733-197 to the Phase II-A model 733-290 have not changed the original concepts and approaches to ground operations. However, because of the increased size of the model 733-290, the ground operation requirements were re-evaluated. The re-evaluation results are: (1) ground support equipment requirements are essentially the same as outlined for the Phase I proposal; additional equipment includes a maintenance run-up sound suppressor, accessory drive removal and installation equipment, an articulated nose sling, and fuel tank thermal insulation repair equipment; (2) the model 733-290 configuration is compatible with the fifteen airports designated by the FAA with minor modifications to fixed facilities required in some cases; (3) servicing times are 30 minutes at enroute stations and 55 minutes at origin and turn-around stations; servicing actions and servicing equipment are the same as discussed in the Phase I proposal. The following elements of ground operation, as proposed in Phase I, are still applicable: provisioning; functional analysis system; Airport mobile facilities; and maintenance. (Author).

Download or read book Supersonic Transport Development Program Phase Iii Proposal Boeing Model 2707 Volume Iv 5 Internal Noise Program written by R. H. Sawhill and published by . This book was released on 1966 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents: B-2707 Interior Noise Levels; Noise Sources -- Boundary layer noise, Engine noise, Equipment and systems noise, Prediction Methods and Noise Reduction -- Boundary layer noise prediction, Prediction methods for transmission loss, and Noise reduction.

Download or read book Commercial Supersonic Transport Program Phase Ii a Comprehensive Report Volume Xvi a Test and Certification Plan written by BOEING CO RENTON WA AIRPLANE DIV. and published by . This book was released on 1964 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Commercial Supersonic Transport Program Phase Ii a Comprehensive Report Volume I a Summary written by BOEING CO RENTON WA AIRPLANE DIV. and published by . This book was released on 1964 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Commercial Supersonic Transport Program Phase Ii c Interim Aircraft Performance Assessment Report Systems written by BOEING CO RENTON WA. and published by . This book was released on 1965 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Substantial progress has been made in all systems development essentially as outlined in the Phase II-B and II-C plans. Because of their relative importance and sensitivity to variations in airplane configuration and their effect on performance, only the development of flight control systems and flight deck vision is reported. (Author).