Download or read book Unsteady Velocity Measurements Taken Behind a Model Helicopter Rotor Hub in Forward Flight Nasa tm 4738 written by and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Unsteady Velocity Measurements Taken Behind a Model Helicopter Rotor Hub in Forward Flight written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-09 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Drag caused by separated flow behind the hub of a helicopter has an adverse effect on aerodynamic performance of the aircraft. To determine the effect of separated flow on a configuration used extensively for helicopter aerodynamic investigations, an experiment was conducted using a laser velocimeter to measure velocities in the wake of a model helicopter hub operating at Mach-scaled conditions in forward flight. Velocity measurements were taken using a laser velocimeter with components in the vertical and downstream directions. Measurements were taken at 13 stations downstream from the rotor hub. At each station, measurements were taken in both a horizontal and vertical row of locations. These measurements were analyzed for harmonic content based on the rotor period of revolution. After accounting for these periodic velocities, the remaining unsteady velocities were treated as turbulence. Turbulence intensity distributions are presented. Average turbulent intensities ranged from approximately 2 percent of free stream to over 15 percent of free stream at specific locations and azimuths. The maximum average value of turbulence was located near the rear-facing region of the fuselage. Berry, John D. Langley Research Center NASA-TM-4738, NAS 1.15:4738, L-17524, ATCOM-TR-97-A-001 RTOP 505-59-36-01...
Download or read book Principles of Helicopter Aerodynamics with CD Extra written by Gordon J. Leishman and published by Cambridge University Press. This book was released on 2006-04-24 with total page 860 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by an internationally recognized teacher and researcher, this book provides a thorough, modern treatment of the aerodynamic principles of helicopters and other rotating-wing vertical lift aircraft such as tilt rotors and autogiros. The text begins with a unique technical history of helicopter flight, and then covers basic methods of rotor aerodynamic analysis, and related issues associated with the performance of the helicopter and its aerodynamic design. It goes on to cover more advanced topics in helicopter aerodynamics, including airfoil flows, unsteady aerodynamics, dynamic stall, and rotor wakes, and rotor-airframe aerodynamic interactions, with final chapters on autogiros and advanced methods of helicopter aerodynamic analysis. Extensively illustrated throughout, each chapter includes a set of homework problems. Advanced undergraduate and graduate students, practising engineers, and researchers will welcome this thoroughly revised and updated text on rotating-wing aerodynamics.
Download or read book NASA Langley Scientific and Technical Information Output 1997 written by and published by . This book was released on 1998 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aerodynamics and aeroacoustics of rotorcraft written by and published by . This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stochastic Tools in Turbulence written by John L. Lumley and published by Courier Corporation. This book was released on 2007-01-01 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: This accessible treatment offers the mathematical tools for describing and solving problems related to stochastic vector fields. Advanced undergraduates and graduate students will find its use of generalized functions a relatively simple method of resolving mathematical questions. It will prove a valuable reference for applied mathematicians and professionals in the fields of aerospace, chemical, civil, and nuclear engineering. The author, Professor Emeritus of Engineering at Cornell University, starts with a survey of probability distributions and densities and proceeds to examinations of moments, characteristic functions, and the Gaussian distribution; random functions; and random processes in more dimensions. Extensive appendixes—which include information on Fourier transforms, tensors, generalized functions, and invariant theory—contribute toward making this volume mathematically self-contained.
Download or read book Rotorcraft System Identification written by and published by . This book was released on 1991 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Moon Face and Other Stories written by Jack London and published by Lindhardt og Ringhof. This book was released on 2021-07-07 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: We’ve all taken a dislike to someone for no real reason. But few of us nurture this hatred like the narrator of "Moon-Face". The target of his irrational malice is a man named John Claverhouse. With cold precision, the narrator sets to planning the man’s downfall. Why he has this urge, he can’t explain. But he knows he’ll feel immense satisfaction when John Claverhouse is made to suffer. In this macabre little tale, Jack London pinpoints a very common but unpleasant human trait. And then takes it to a horrifying extreme. This short story collection also includes "All Gold Canyon", which was adapted as part of the Netflix anthology movie "The Ballad of Buster Scruggs". Jack London (1876–1916) was one of the first American writers to achieve worldwide celebrity. He did so with rugged adventure stories set in forbidding landscapes. And heroes who survive by embracing their most primal instincts. His breakthrough best seller was "The Call of the Wild". Inspired by his time in the Klondike Gold Rush, this hard-hitting novel is told from the perspective of a sled dog named Buck. It’s inspired many adaptations, including a big-budget movie starring Harrison Ford. Among London’s other notable works are "White Fang", also featuring a canine protagonist, as well as "The Sea-Wolf", "Martin Eden" and "The Iron Heel".
Download or read book Duty and Desire Book Club Edition written by Anju Gattani and published by . This book was released on 2021-01-27 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: To uphold family honor and tradition, Sheetal Prasad is forced to forsake the man she loves and marry playboy millionaire Rakesh Dhanraj while the citizens of Raigun, India, watch in envy. On her wedding night, however, Sheetal quickly learns that the stranger she married is as cold as the marble floors of the Dhanraj mansion. Forced to smile at family members and cameras and pretend there's nothing wrong with her marriage, Sheetal begins to discover that the family she married into harbors secrets, lies and deceptions powerful enough to tear apart her world. With no one to rely on and no escape, Sheetal must ally with her husband in an attempt to protect her infant son from the tyranny of his family.sion.
Download or read book Scale Effects on Aircraft and Weapon Aerodynamics written by A. B. Haines and published by . This book was released on 1994 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Simulator Study of Stall post stall Characteristics of a Fighter Airplane with Relaxed Longitudinal Static Stability written by and published by . This book was released on 1979 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Design Synthesis and Biological Evaluation of Compounds with Medicinal Value written by Maria Sinicropi and published by . This book was released on 2021 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book explores issues concerning the design, synthetic methods and biological evaluation of molecules of pharmaceutical interest.
Download or read book Special Course on Aircraft Dynamics at High Angles of Attack Experiments and Modelling written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Fluid Dynamics Panel. Special Course and published by . This book was released on 1991 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This report consists of lecture notes of an AGARD Fluid Dynamics Panel Special Course. These notes provide the latest information on the development and use of dynamic experiments in wind tunnels from several of the NATO nations. They address current oscillatory and rotary test techniques, experimental results for typical configurations, and the use of these data for flight mechanics applications. Subject included are: dynamic lift, wing rock, fluid dynamics of rotary flows, mathematical modelling, non-linear data representation, vortex manipulation for control enhancement, and correlations of predictions based on rotary and oscillatory wind-tunnel and flight-test results. The complete course notes are contained in two volumes. The main part of the notes is contained in AGARD Advisory Report 265 (ADA235179). The present volume includes papers on: Unsteady aerodynamics of slender wings; Dynamic stall effects and applications to high performance aircraft; Oscillatory test techniques; Large amplitude oscillations; Oscillatory data for typical configurations; and Forebody vortex control."--Stinet.
Download or read book Steady and Transient Performance Prediction of Gas Turbine Engines written by and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
