Download or read book Optimum Performance and Potential Flow Field of Hovering Rotors written by J. C. Wu and published by . This book was released on 1975 with total page 204 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 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Theoretical Analysis of a Hovering Rotor Induced Potential Flow Field written by James Chen-yuan Wu and published by . This book was released on 1971 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Flow Field Around a Hovering Rotor written by and published by . This book was released on 1997 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NBS Special Publication written by and published by . This book was released on 1973 with total page 1562 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Helicopter Theory written by Wayne Johnson and published by Courier Corporation. This book was released on 2012-03-07 with total page 1122 pages. Available in PDF, EPUB and Kindle. Book excerpt: Monumental engineering text covers vertical flight, forward flight, performance, mathematics of rotating systems, rotary wing dynamics and aerodynamics, aeroelasticity, stability and control, stall, noise, and more. 189 illustrations. 1980 edition.

Download or read book Hydraulic Research in the United States and Canada written by United States. National Bureau of Standards and published by . This book was released on 1972 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hydraulic Research in the United States and Canada 1972 written by Gershon Kulin and published by . This book was released on 1974 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book PIV Flow Field Measurements of Hovering Rotors with Leading Edge Protuberances written by Brian P. Cully and published by . This book was released on 2017 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ability of a helicopter to hover and takeoff/land vertically makes it uniquely suited for many different missions. However, its relatively low forward flight speed has led to a focus on developing helicopters with significantly higher velocity ceilings. The inspiration for the use of protuberances stems from the leading-edge of the pectoral flipper on the humpback whale which, despite its large size, has exceptional maneuverability (i.e., small turning radius) among other whale species. This project utilized thrust and torque measurements and high-resolution particle image velocimetry (PIV) measurements to analyze performance and wake characteristics of rotors with leading-edge protuberances. Four modified blades, with sinusoidal leading-edges of various amplitudes and wavelengths, were compared to a fifth baseline design. As thrust increased, the modified blades required additional power compared to the baseline; this power increase was directly related to protuberance amplitude, while wavelength had a minimal effect. The baseline and low amplitude blades produced similar flow fields: a concentrated tip vortex and a less turbulent wake sheet. Conversely, the higher amplitude blades produced a significantly more turbulent wake sheet and less coherent tip vortices that dissipated quickly. The higher amplitude blades created more uniform (and more ideal) inflow across the rotor disk, but the generation of vortices along these blades most likely contributed to their greater power requirements.

Download or read book Flowfield of a Lifting Hovering Rotor A Navier Stokes Simulation written by and published by . This book was released on 1990 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aeronautical Engineering written by and published by . This book was released on 1971 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: A selection of annotated references to unclassified reports and journal articles that were introduced into the NASA scientific and technical information system and announced in Scientific and technical aerospace reports (STAR) and International aerospace abstracts (IAA)

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1975 with total page 1032 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Flow Field Analysis of Highly twisted Rotors in Hover written by Gloria Kazuko Yamauchi and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Annual Index written by and published by . This book was released on 1975 with total page 882 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Vertica written by and published by . This book was released on 1987 with total page 806 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Rotor Wing Interactions in Hover written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-09-24 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hover predictions of tiltrotor aircraft are hampered by the lack of accurate and computationally efficient models for rotor/wing interactional aerodynamics. This paper summarizes the development of an approximate, potential flow solution for the rotor-on-rotor and wing-on-rotor interactions. This analysis is based on actuator disk and vortex theory and the method of images. The analysis is applicable for out-of-ground-effect predictions. The analysis is particularly suited for aircraft preliminary design studies. Flow field predictions from this simple analytical model are validated against experimental data from previous studies. The paper concludes with an analytical assessment of the influence of rotor-on-rotor and wing-on-rotor interactions. This assessment examines the effect of rotor-to-wing offset distance, wing sweep, wing span, and flaperon incidence angle on tiltrotor inflow and performance.Young, Larry A. and Derby, Michael R.Ames Research CenterFLOW DISTRIBUTION; MATHEMATICAL MODELS; ROTOR AERODYNAMICS; TILT ROTOR AIRCRAFT; INTERACTIONAL AERODYNAMICS; HOVERING; AIRCRAFT DESIGN; SWEPT WINGS; POTENTIAL FLOW; VORTICES; WING SPAN; FLAPERONS

Download or read book Results of the Integration of a Transonic Full potential Analysis Program with a Free wake Lifting line Program for Hovering Rotors written by and published by . This book was released on 1987 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: