Download or read book A Semi empirical Method for Calculating Optimum Propeller Performance written by Robert Roy Fullerton and published by . This book was released on 1992 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS)* at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dis semination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the though that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volumes were handled by an international publishing house to assure improved service and broader dissemi nation. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 37 (thesis year 1992) a total of 12,549 thesis titles from 25 Canadian and 153 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this impor tant annual reference work. While Volume 37 reports theses submitted in 1992, on occasion, certain uni versities do report theses submitted in previous years but not reported at the time.
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:
Download or read book Masters Abstracts International written by and published by . This book was released on 1993 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Masters Theses in the Pure and Applied Sciences written by W. H. Shafer and published by Springer Science & Business Media. This book was released on 1994 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume 37 (thesis year 1992) reports a total of 12,549 thesis titles from 25 Canadian and 153 US universities (theses submitted in previous years but only now reported are indicated by the thesis year shown in parenthesis). The organization, like that of past years, consists of thesis titles arrange
Download or read book Confidential Documents written by United States. Army Air Forces and published by . This book was released on 1939 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Causes and Corrections for Propeller excited Airborne Noise on a Naval Auxiliary Oiler written by Michael B. Wilson and published by . This book was released on 1983 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hamilton Standard Method of Propeller Performance Calculation written by United Aircraft Corporation. Hamilton Standard Propeller Division and published by . This book was released on 1941 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Master s Theses Directories written by and published by . This book was released on 1993 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Education, arts and social sciences, natural and technical sciences in the United States and Canada".
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1973 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Drag and Propulsive Efficiency of Shrouded Air Propellers in Axial Flow an Analytical Review of Experimental Investigations written by Arthur E. Johnson and published by . This book was released on 1968 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental investigations of shrouded air propellers in which propulsive efficiency in axial flow was measured have been reviewed. A simple, semi-empirical formula, using either measured or estimated shroud drag, gives good predictions of the propulsive efficiency at Mach numbers below the drag rise Mach number, provided the shroud does not have appreciable drag due to separation or interference between its various parts. For each shrouded propeller, there is a range of thrust coefficients in which near-maximum efficiency occurs that helps determine that shrouded propeller's applicability to a given aircraft propulsion requirement. Because of this characteristic, shrouded propellers for VTOL aircraft with good efficiency in both hover and cruise will probably have to have either variable intake lip geometry or variable disc area. (Author).
Download or read book Ship Resistance and Propulsion written by Anthony F. Molland and published by Cambridge University Press. This book was released on 2011-08-08 with total page 569 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by experts in the ship design field, this book provides a comprehensive approach to evaluating ship resistance and propulsion.
Download or read book Propeller Performance and Noise written by and published by . This book was released on 1982 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Higher Order Free Wake Method for Aerodynamic Performance Prediction of Propeller Wing Systems written by Julia Cole and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A new higher-order free-wake (HOFW) method has been developed to enable conceptual design space explorations of propeller-wing systems. The method uses higher order vorticity elements to represent the wings and propeller blades as lifting surfaces. The higher order elements allow for better force resolution and more intrinsically computationally stable wakes than a comparable vortex-lattice method, while retaining the relative ease of geometric representation inherent to such methods. The propeller and wing surfaces and wakes are modeled within the same flow field, thus accounting for mutual interaction without the need for empirical models. The method was shown to be accurate through comparisons with other methods and experimental data. To ensure the method is capable of capturing an unsteady lift response, it was compared with a Kussner function approximation of the change in two-dimensional lift due to a sharp-edged gust. This study showed excellent agreement with an average error in the HOFW lift response of less than 3% from 0 to 10 semi-chords, but required high time and space resolution. The time-accurate lift response of a propeller-wing system as predicted with the HOFW method was then compared with with fully unsteady CFD. These results showed that the HOFW method can identify the peak frequency and general amplitude of the lift oscillations at high resolution. Due to the high resolution requirements, this mode of analysis is not recommended for use in design studies. Time-averaged results found using the HOFW method were compared with experimental propeller, proprotor, and propeller-wing system data, along with two semi-empirical methods. The method matched experimental propeller efficiencies to within 4% for lightly loaded conditions. Increases in lift coefficient due to interaction with a propeller for a series of wings as analyzed with the HOFW method matched the average of those predicted with two semi-empirical methods with an average of 6.5% error for a lightly loaded propeller case. A comparison of HOFW predictions of lift for a more non-conventional propeller-wing system with experimental results over a range of angles of attack showed an average difference of 0.04 in lift coefficient. For this system, predictions in thrust and torque also matched experimental results within 5% over a small angle of attack range (+/- 5 degrees). The method was less successful at predicting the magnitude of drag in comparison with experimental results, but was capable of qualitatively matching trends in drag, both with changes in angle of attack and for variations in design.Finally, two design studies were conducted to show the practical utility of the method: an investigation of the twist distribution on a large civil tiltrotor wing and an investigation into propeller rotation direction and vertical location on a distributed electric propulsion vehicle. The studies showed that the method is capable, fast, accurate, and robust for performance prediction of propeller-wing systems, and thus appropriate for use in design-space exploration.
Download or read book Aerospace Engineering e Mega Reference written by Mike Tooley and published by Butterworth-Heinemann. This book was released on 2009-03-23 with total page 1187 pages. Available in PDF, EPUB and Kindle. Book excerpt: A one-stop Desk Reference, for engineers involved in all aspects of aerospace; this is a book that will not gather dust on the shelf. It brings together the essential professional reference content from leading international contributors in the field. Material covers a broad topic range from Structural Components of Aircraft, Design and Airworthiness to Aerodynamics and Modelling * A fully searchable Mega Reference Ebook, providing all the essential material needed by Aerospace Engineers on a day-to-day basis. * Fundamentals, key techniques, engineering best practice and rules-of-thumb together in one quick-reference.* Over 2,500 pages of reference material, including over 1,500 pages not included in the print edition
Download or read book Calculation of Optimum Efficiency for a Series of Large hub Propellers for Application to Tandem Propulsion of a Submerged Body of Revolution written by John L. Beveridge and published by . This book was released on 1964 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Calculations were performed to determine the efficiency of integral bow and stern propellers for a body of revolution. Such a propulsion system leads to propellers with large hubs relative to the tip diameter and a large number of blades. The calculations were carried out for a propeller with 13 blades with various tip diameters, blade areas, and rpm's. The series results are presented, analyzed, and applied to computing the propulsion performance of a hypothetical 250-foot tandem propeller submarine.
Download or read book AIAA 26th Aerospace Sciences Meeting written by and published by . This book was released on 1988 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt:
