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A Computational And Experimental Investigation Of The Propulsive And Lifting Characteristics Of Oscillating Airfoils And Airfoil Combinations In Incompressible Flow
Download A Computational And Experimental Investigation Of The Propulsive And Lifting Characteristics Of Oscillating Airfoils And Airfoil Combinations In Incompressible Flow full books in PDF, epub, and Kindle. Read online A Computational And Experimental Investigation Of The Propulsive And Lifting Characteristics Of Oscillating Airfoils And Airfoil Combinations In Incompressible Flow ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis A Computational and Experimental Investigation of the Propulsive and Lifting Characteristics of Oscillating Airfoils and Airfoil Combinations in Incompressible Flow by : Kerry S. Neace
Download or read book A Computational and Experimental Investigation of the Propulsive and Lifting Characteristics of Oscillating Airfoils and Airfoil Combinations in Incompressible Flow written by Kerry S. Neace and published by . This book was released on 1992 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Masters Theses in the Pure and Applied Sciences by : Wade H. Shafer
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 426 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 thought 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 dissemination. 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 38 (thesis year 1993) a total of 13,787 thesis titles from 22 Canadian and 164 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 38 reports theses submitted in 1993, on occasion, certain uni versities do report theses submitted in previous years but not reported at the time.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1991 with total page 1460 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Book Synopsis Masters Theses in the Pure and Applied Sciences by : Sade H Shafer
Download or read book Masters Theses in the Pure and Applied Sciences written by Sade H Shafer and published by Springer Science & Business Media. This book was released on 1995 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cited in Sheehy, Chen, and Hurt . Volume 38 (thesis year 1993) reports a total of 13,787 thesis titles from 22 Canadian and 164 US universities. As in previous volumes, thesis titles are arranged by discipline and by university within each discipline. Any accredited university or college with a grad
Book Synopsis AIAA Journal by : American Institute of Aeronautics and Astronautics
Download or read book AIAA Journal written by American Institute of Aeronautics and Astronautics and published by . This book was released on 2004 with total page 954 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 1991 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aeronautical Engineering: A Cumulative Index to a Continuing Bibliography (supplement 300) by :
Download or read book Aeronautical Engineering: A Cumulative Index to a Continuing Bibliography (supplement 300) written by and published by . This book was released on 1994 with total page 686 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1993 with total page 1768 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Theoretical and Experimental Investigation of the Effect of Tunnel Walls on the Forces on an Oscillating Airfoil in Two-dimensional Subsonic Compressible Flow by : Harry L. Runyan
Download or read book Theoretical and Experimental Investigation of the Effect of Tunnel Walls on the Forces on an Oscillating Airfoil in Two-dimensional Subsonic Compressible Flow written by Harry L. Runyan and published by . This book was released on 1955 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper presents a theoretical and experimental investigation of the effect of wind-tunnel walls on the air forces on an oscillating wing in two-dimensional subsonic compressible flow. A method of solving an integral equation which relates the downwash on a wing to the unknown loading is given, and some comparisons are made between the theoretical results and the experimental results. A resonance condition, which was predicted by theory in a previous report (NACA Rep. 1150), is shown experimentally to exist. In addition, application of the analysis is made to a number of examples in order to illustrate the influence of walls due to variations in frequency of oscillation, Mach number, and ratio of tunnel height to wing semichord.
Book Synopsis Experimental Investigation of Incompressible Flow Past Airfoils with Oscillating Jet Flaps by : J. M. Simmons
Download or read book Experimental Investigation of Incompressible Flow Past Airfoils with Oscillating Jet Flaps written by J. M. Simmons and published by . This book was released on 1970 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis On the Theory of Oscillating Airfoils of Finite Span in Subsonic Compressible Flow by : Eric Reissner
Download or read book On the Theory of Oscillating Airfoils of Finite Span in Subsonic Compressible Flow written by Eric Reissner and published by . This book was released on 1949 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present report is concerned with the problem of the oscillating airfoil of finite span, within the frame of the linearized lifting surface theory. The aim of this study is the development of a theory which incorporates simultaneously the effects of three-dimensionality of the flow and of compressibility of the fluid. As an exact solution of this problem, even within the limitations of the linearized theory, presents very great difficulties, it is worth while to work toward an approximate theory which is valid provided the aspect ratio of the lifting surface is not too small.
Book Synopsis Extension of the Theory of Oscillating Airfoils of Finite Span in Subsonic Compressible Flow by : Eric Reissner
Download or read book Extension of the Theory of Oscillating Airfoils of Finite Span in Subsonic Compressible Flow written by Eric Reissner and published by . This book was released on 1951 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: As part of an investigation of flows around and forces on an oscillating finite wing in subsonic compressible flow, the exact double integrals occurring in the theoretical formulation of the three-dimensional nonstationary aerodynamic forces have previously been reduced to single integrals over the range of either one of the two independent variables. The present report describes a method for solving the resultant three-dimensional problem based on a generalization of approximate methods for solving two-dimensional problems. It is shown that the calculation of three-dimensional corrections to the two-dimensional integral equation for spanwise variation of circulation, provided tabulated values for the kernal of the integral equation are available.
Book Synopsis A Computational and Experimental Investigation of Incompressible Oscillatory Airfoil Flow and Flutter Problems by : Peter J. Riester
Download or read book A Computational and Experimental Investigation of Incompressible Oscillatory Airfoil Flow and Flutter Problems written by Peter J. Riester and published by . This book was released on 1993 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Computational and Experimental Investigation of Flapping-Wing Propulsion by : Timothy Craig Lund
Download or read book A Computational and Experimental Investigation of Flapping-Wing Propulsion written by Timothy Craig Lund and published by . This book was released on 2000-03-01 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flapping-wing propulsion is studied experimentally and numerically. The objective of the research is to provide further insight into the aerodynamics of flapping-wing air vehicles. Experimental work is conducted in the NPS 1.5 m x 1.5 m (5 ft x 5 ft) in-draft wind tunnel. A previously constructed long-span flapping-wing model suspended by cables is used to approximate the two-dimensional nature of the numerical simulation. For this experiment, the model is configured with two wings executing plunge-only motion. Thrust is indirectly determined by using a laser rangefinder to measure streamwise displacement of the model. Results are compared with previous experimental tests. A numerical analysis is conducted using USPOT, a locally developed unsteady panel code that models two independently moving airfoils with three degrees of freedom and non-linear deforming wakes. Thrust and efficiencies are computed for harmonically oscillating airfoils. Direct comparison is made between experimental and numerical thrust measurements.
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1993 with total page 1452 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied mechanics reviews written by and published by . This book was released on 1948 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental Investigation of the Lift Frequency Response and Trailing-edge Flow Physics of a Surging Airfoil by : Wenbo Zhu
Download or read book Experimental Investigation of the Lift Frequency Response and Trailing-edge Flow Physics of a Surging Airfoil written by Wenbo Zhu and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the growing interest in faster helicopters, commercial unmanned vertical lift vehicles, and vertical-axis-wind-turbines, it becomes critical to understand the unsteady loading on the rotor blade so that more efficient designs can be produced. The classic unsteady airfoil theories are tools useful to predict loads on two-dimensional rotor blade sections for moderate surging, pitching, and plunging motions. Specifically, Isaacs' surging airfoil theory assumes a two-dimensional thin flat plate at small angles of attack under a sinusoidally-oscillating freestream in an incompressible inviscid flow. The unsteady lift coefficient is then solved by the potential flow theory with the Kutta condition at the trailing-edge. However, Isaacs' surging airfoil theory has not been fully validated experimentally. As a result, this work is intended to investigate this surging airfoil theory experimentally and evaluate the key parameters in such unsteady motion, the flow physics, and the validity of the various assumptions. Firstly, the wind tunnel at the Aerospace Research Center, the Ohio State University, is modified to generate a sinusoidally-oscillating freestream in the test section with the design of rotating elliptical choke-vanes downstream. The modified unsteady wind tunnel is characterized to understand its unsteady response for a surging airfoil experiment, with the help of various intrusive measurements and analytical and numerical tools. Secondly, a NACA 0018 and a NACA 63-015A airfoil were tested at moderate surging flow conditions in terms of Reynolds number, Mach number, velocity amplitude, and reduced frequency. Surface pressure measurements of the lift frequency response indicated a significant disagreement with Isaacs' theory in terms of the lift overshoot and undershoot, where optical measurements revealed signs of an oscillatory trailing-edge stagnation condition for the surging airfoil which violates the classic Kutta condition in the unsteady potential flow theory. Finally, a hypothesis was formulated about the momentum balance of shear layers at the trailing-edge, which is intended to develop a viscous and unsteady correction to the classic Kutta condition and connect the unsteady stagnation condition with the resulting lift frequency response. A near-wake velocity survey was conducted on a NACA 63-015A airfoil with various flow transition behaviors. Results supported the hypothesis that a dynamic shear layer momentum balance exists near the trailing-edge and its dynamics can be correlated to the measured lift undershoot and overshoot. Overall, the experimental study in this work offers additional insight into the unsteady trailing-edge stagnation condition, and highlights the need to modify the Kutta condition with unsteady and viscous effects for a surging airfoil.
