Download or read book Jet Noise Suppression by an Impedance Shroud written by Ian S. F. Jones and published by . This book was released on 1970 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Jet noise can be attenuated by shielding the observer from the noise sources with a sheet of fluid having a different acoustic impedance to the undisturbed atmosphere. The attenuation due to a heated sheet of gas lying on an arc centered on the axis of a subsonic jet was measured. The maximum noise reduction in certain frequency bands in this experiment was 10 dB. (Author).

Download or read book NASA Technical Note written by and published by . This book was released on 1973 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1988 with total page 968 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aeroacoustics Jet noise combustion and core engine noise written by Ira R. Schwartz and published by . This book was released on 1976 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Noise Suppression in Jet Inlets written by Ben T. Zinn and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hybrid Active Passive Jet Engine Noise Suppression System written by and published by . This book was released on 1999 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigation of Feasible Nozzle Configurations for NOise Reduction in Turbofan and Turbojet Aircraft Volume III Shrouded Slot Nozzle Configurations written by B. H. Goethert and published by . This book was released on 1977 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents the results of a study of the acoustic and fluid dynamic characteristics of a shrouded slot nozzle. Experiments were carried out on a slot nozzle of aspect ratio 27 with an ejector shroud having a cross sectional area of four times the primary nozzle area. Parameters varied during the tests were, shroud length, shroud divergence ratio, and acoustical impedance of the shroud wall. Tests were conducted for primary flow Mach numbers from 0.5 to choking and stagnation temperatures from ambient to 1200 R. The results of the study show that both the thrust and the noise attenuation characteristics of the ejector shroud improve with increasing length. Thrust increases of near 40% were obtained for the longest shroud tested. A noise reduction of 13 dB was obtained for the lined shroud with a near choked, high temperature primary jet. The corresponding thrust augmentation was approximately 20%. (Author).

Download or read book Transonic Performance Characteristics of Several Jet Noise Suppressors written by James W. Schmeer and published by . This book was released on 1960 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fundamental Study of Jet Noise Generation and Suppression written by W. C. Sperry and published by . This book was released on 1960 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Noise Pollution Resources Compendium written by University of New Mexico. Technology Application Center and published by . This book was released on 1972 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aeroacoustics written by Ira R. Schwartz and published by . This book was released on 1976 with total page 810 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Archives of Acoustics Quarterly written by and published by . This book was released on 1986 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aeroacoustics written by and published by . This book was released on 1975 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigation of Feasible Configuration for Noise Reduction in Turbofan and Turbojet Aircraft written by and published by . This book was released on 1977 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Federal Aircraft Noise Abatement Plan written by United States. Office of Noise Abatement and published by . This book was released on 1970 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Second Federal Aircraft Noise Abatement Plan FY 1970 71 written by United States. Office of Noise Abatement and Control and published by . This book was released on 1971 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book U S Government Research Development Reports written by and published by . This book was released on 1970 with total page 1342 pages. Available in PDF, EPUB and Kindle. Book excerpt: