Share

An Experimental Investigation of Artificially Induced Transition to Turbulence on a Body of Revolution

1975
Download An Experimental Investigation of Artificially Induced Transition to Turbulence on a Body of Revolution PDF Online Free

Author :
Release : 1975
Genre :
Kind : eBook
Book Rating : /5 ( reviews)

GET EBOOK


Book Synopsis An Experimental Investigation of Artificially Induced Transition to Turbulence on a Body of Revolution by : William F. Shivitz

Download or read book An Experimental Investigation of Artificially Induced Transition to Turbulence on a Body of Revolution written by William F. Shivitz. This book was released on 1975. Available in PDF, EPUB and Kindle. Book excerpt: Transition to turbulence in a boundary layer continues to be a topic of considerable interest to both aerodynamicists and hydrodynamicists. The present study focuses on the particular aspect of the problem pertaining to transition zone characteristics induced by a circular trip wire located upstream of the point of instability on a blunt nosed body of revolution. The actual transition to turbulence occurs in a region of adverse pressure gradient. The study was made on an eight-inch diameter body of revolution which had a blunt nose faired to a cylindrical afterbody with a modified ellipsoid contour. The velocity field was measured with hot-wire sensors and analyzed using analog techniques to determine velocity, intermittency, spatial correlation, and spectral characteristics. Transition to turbulence was found to be very sensitive to trip wire diameter and location and to the free-stream Reynolds number. Certain of the high amplitude instability waves induced by the trip mechanism were observed to be selectively amplified into transition in a manner similar to that predicted by stability theory. Secondary instabilities were observed to contribute to the transition process. Cross spectral densities were measured for the bursts moving downstream to determine if any narrowband range of frequencies were present which could contribute to far-field noise radiated from the boundary layer. A one-third octave filter was used to determine spectral velocity fluctuation concentrations of the bursts at a location within the transition region and compared to similar concentrations at a fully turbulent location. (Author).

Scientific and Technical Aerospace Reports

1992 Aeronautics
Download Scientific and Technical Aerospace Reports PDF Online Free

Author :
Release : 1992
Genre : Aeronautics
Kind : eBook
Book Rating : /5 ( reviews)

GET EBOOK


Book Synopsis Scientific and Technical Aerospace Reports by :

Download or read book Scientific and Technical Aerospace Reports written by . This book was released on 1992. Available in PDF, EPUB and Kindle. Book excerpt:

Masters Theses in the Pure and Applied Sciences

2013-11-21 Science
Download Masters Theses in the Pure and Applied Sciences PDF Online Free

Author :
Release : 2013-11-21
Genre : Science
Kind : eBook
Book Rating : 794/5 ( reviews)

GET EBOOK


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. This book was released on 2013-11-21. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and dis· seminated 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 dissemination phases of the ac· tivity 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 volume 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 20 (thesis year 1975) a total of 10,374 theses titles from 28 Canadian and 239 United States universities. We are sure that this broader base for theses titles reported will greatly enhance the value of this important annual reference work. The organization of Volume 20 is identical to that of past years. It consists of theses titles arranged by discipline and by university within each discipline.

Experimental Investigation of Temperature Recovery Factors on Bodies of Revolution at Supersonic Speeds

1949 Aerodynamics, Supersonic
Download Experimental Investigation of Temperature Recovery Factors on Bodies of Revolution at Supersonic Speeds PDF Online Free

Author :
Release : 1949
Genre : Aerodynamics, Supersonic
Kind : eBook
Book Rating : /5 ( reviews)

GET EBOOK


Book Synopsis Experimental Investigation of Temperature Recovery Factors on Bodies of Revolution at Supersonic Speeds by : William R. Wimbrow

Download or read book Experimental Investigation of Temperature Recovery Factors on Bodies of Revolution at Supersonic Speeds written by William R. Wimbrow. This book was released on 1949. Available in PDF, EPUB and Kindle. Book excerpt: Local temperature recovery factors have been measured on two bodies of revolution at Mach numbers of 2.0 and are shown to be independent of Mach number, Reynolds number, or body shape. The measured recovery factor is well represented by the square root of Prandtl number for laminar boundary layers and by the cube root of Prandtl number for turbulent boundary layers, as predicted by theory.

Experimental Investigation of Flutter of a Propeller with Clark Y Section Operating at Zero Forward Velocity at Positive and Negative Blade-angle Settings

1949 Aerofoils
Download Experimental Investigation of Flutter of a Propeller with Clark Y Section Operating at Zero Forward Velocity at Positive and Negative Blade-angle Settings PDF Online Free

Author :
Release : 1949
Genre : Aerofoils
Kind : eBook
Book Rating : /5 ( reviews)

GET EBOOK


Book Synopsis Experimental Investigation of Flutter of a Propeller with Clark Y Section Operating at Zero Forward Velocity at Positive and Negative Blade-angle Settings by : John E. Baker

Download or read book Experimental Investigation of Flutter of a Propeller with Clark Y Section Operating at Zero Forward Velocity at Positive and Negative Blade-angle Settings written by John E. Baker. This book was released on 1949. Available in PDF, EPUB and Kindle. Book excerpt: The highest flutter speeds were found in the vicinity of the angle of zero aerodynamic moment and the flutter speed increased considerably in this region with decreasing pressure. Over the rest of the pitch range, the flutter speeds were much lower and varied little with pressure.

You may also like...