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An Experimental And Theoretical Investigation Of The Reduction In Parachute Drag Caused By Forebody Wake Effects
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Book Synopsis An Experimental and Theoretical Investigation of the Reduction in Parachute Drag Caused by Forebody Wake Effects by : Carl W. Peterson
Download or read book An Experimental and Theoretical Investigation of the Reduction in Parachute Drag Caused by Forebody Wake Effects written by Carl W. Peterson and published by . This book was released on 1982 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experiment was conducted to evaluate approximate analytical methods for predicting the reduction in parachute drag caused by forebody wake effects. The drag of a 20° conical ribbon parachute was measured at several axial stations behind an ogive cylinder forebody with and without fins. The same parachute was tested in "undisturbed" flow (where wake effects were neligible) so that the effects of suspension line length on parachute drag could be separated from the drag losses caused by the turbulent wake. Total head pressure surveys were made across the forebody wake and integrated scross the canopy skirt area to determine the effective dynamic pressure acting on the parachute. Experimental results confirmed the validity of the underlying physical model of the parachute/wake interaction: the ratio of parachute drag behind a forebody divided by wake-free parachute drag is equal to the ratio of effective dynamic pressure acting on the parachute divided by free-stream dynamic pressure. However, the inability of existing turbulent wake theoretical models to make accurate predictions of wake velocity distributions for arbitrary forebody shapes is a fundamental limitation of the drag-loss analysis. If wake velocity profiles are known, the empirical constants in the turbulent wake theoretical models can be adjusted and accurate estimates of wake-induced parachute drag loss can be obtained from existing theory.
Book Synopsis Reductions in Parachute Drag Due to Forebody Wake Effects by : C. W. Peterson
Download or read book Reductions in Parachute Drag Due to Forebody Wake Effects written by C. W. Peterson and published by . This book was released on 1981 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experiment was conducted to evaluate approximate analytical methods for predicting the reduction in parachute drag due to forebody wake effects. The drag of a 20° conical ribbon parachute was measured at several axial stations behind an ogive-cylinder forebody with and without fins. The same parachute was tested in "undisturbed" flow (where wake effects were negligible) so that the effects of suspension line length on parachute drag could be separated from the drag losses caused by the turbulent wake. Total head pressure surveys were made across the forebody wake and integrated across the canopy skirt area to determine the effective dynamic pressure acting on the parachute. Experimental results confirmed the validity of the underlying physical model of the parachute/wake interaction: the ratio of parachute drag behind a forebody divided by wake-free parachute drag is equal to the ratio of effective dynamic pressure acting on the parachute divided by freestream dynamic pressure. However, the inability of existing turbulent wake theoretical models to make accurate predictions of wake velocity distributions for arbitrary forebody shapes is a fundamental limitation of the drag loss analysis. If wake velocity profiles are known, the empirical constants in trhe turbulent wake theoretical models can be adjusted and accurate estimates of wake-induced parachute drag loss can be obtained from existing theory.
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 1992 with total page 1572 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Download or read book Aeronautical Engineering written by and published by . This book was released on 1993 with total page 712 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)
Book Synopsis Interference Problems on Wing-fuselage Combinations in Inviscid, Incompressible Flow by : Aeronautical Research Council (Great Britain)
Download or read book Interference Problems on Wing-fuselage Combinations in Inviscid, Incompressible Flow written by Aeronautical Research Council (Great Britain) and published by . This book was released on 1974 with total page 1212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aerodynamic Deceleration 61 by : Wilfried Heins
Download or read book Aerodynamic Deceleration 61 written by Wilfried Heins and published by . This book was released on 1961 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: The time history of the process of deployment and stretching of a parachute is considered as the motion of a primary and secondary body which are connected elastically to each other. The motion as a function of time is represented by a nonlinear system of differential equations of second order. This system of differential equations has been solved for a Kostelezky ribbon parachute by means of an analog computer and gives for the primary and secondary body the time histories of the distances, of the velocities, and of the force acting between the two bodies.
Book Synopsis Aeronautical Engineering: A Continuing Bibliography, 1982 Cumulative Index by :
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Book Synopsis AIAA 81-1912 - AIAA 81-1952 (With omissions in numbering) by :
Download or read book AIAA 81-1912 - AIAA 81-1952 (With omissions in numbering) written by and published by . This book was released on 1981 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Book Synopsis Government Reports Annual Index: Keyword A-L by :
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Author :American Institute of Aeronautics and Astronautics. Technical Information Service Publisher : ISBN 13 : Total Pages :764 pages Book Rating :4.3/5 (91 download)
Book Synopsis The Finding Guide to AIAA Meeting Papers by : American Institute of Aeronautics and Astronautics. Technical Information Service
Download or read book The Finding Guide to AIAA Meeting Papers written by American Institute of Aeronautics and Astronautics. Technical Information Service and published by . This book was released on 1981 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Announcements & Index by :
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Book Synopsis Associations' Publications in Print by :
Download or read book Associations' Publications in Print written by and published by . This book was released on 1981 with total page 1508 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1981- in 2 v.: v.1, Subject index; v.2, Title index, Publisher/title index, Association name index, Acronym index, Key to publishers' and distributors' abbreviations.
Book Synopsis Aeronautical Engineering: 1983 Cumulative Index by :
Download or read book Aeronautical Engineering: 1983 Cumulative Index written by and published by . This book was released on 1984 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1997 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt:
