Download or read book Flow Field Visualization in the Wake of a Ribbon Parachute written by William L. Garrard and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental investigation was conducted to determine the flow field in the wake of a flexible ribbon parachute model. A nylon ribbon parachute model with a geometric porosity of 20 percent was mounted in an open section of a horizontal return wind tunnel at an angle of attack of approximately zero degrees. To define the flow field, tufts were introduced into the wake of the parachute by means of a steel rod fastened to a sting [sic] that ran down the centerline of the parachute. Two photographs were taken simultaneously to record the pattern of the flow field at that given instant of time. These photographs could then be used in conjunction with high-speed movies already produced to determine the direction of the flow in the wake of the parachute. The results of this study seem to indicate that the photographs taken can help aid in determining the flow direction.
Download or read book Flow Visualization and Mean Pressure and Velocity Measurements Behind the Grid Models written by Hyun-Jin Kim and published by . This book was released on 1986 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flow field past a row of closely spaced flat plates simulating the segment of the ribbon parachute was investigated experimentally both in air and water. Flow visualizations and surface pressure measurements were conducted to study the effect of the spacing ratio and the Reynolds number. Irregular and unstable flow patterns at high solidity configurations were documented in detail. Sensitivity of the flow pattern to the external disturbance was also studied. In addition, mean and fluctuating velocity profile measurements was [sic] conducted in the wake of a flat grid model. The results of the curved grid model indicated a stabilizing effect of the grid curvature.
Download or read book Visualization of the Flow Field about Parachute Canopy Models and Approximation of Canopy Pressure Distributions written by Charles A. Babish (III.) and published by . This book was released on 1965 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental investigation of the flow field about rigid two-dimensional models of parachute canopies was conducted. Models representing the inflated profile shapes of the drag-producing surface of nine parachute canopy types were tested in the Air Force Institute of Technology (AFIT) Smoke Tunnel Test Facility. Angles of attack varied from 0 to 30 degrees and photographs of the models and attendant smoke stream patterns were obtained for each test condition.
Download or read book Ribbon Surface Pressure and Wake Velocity Data for the Experimental Validation of a Vortex based Parachute Inflation Code written by Donald Dean McBride and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An experiment to measure surface pressure data on a series of three stainless steel simulated parachute ribbons was conducted. During the first phase of the test, unsteady pressure measurements were made on the windward and leeward sides of the ribbons to determine the statistical properties of the surface pressures. Particle Image Velocimetry (PIV) measurements were simultaneously made to establish the velocity field in the wake of the ribbons and its correlation with the pressure measurements. In the second phase of the test, steady-state pressure measurements were made to establish the pressure distributions. In the third phase, the stainless steel ribbons were replaced with nylon ribbons and PIV measurements were made in the wake. A detailed error analysis indicates that the accuracy of the pressure measurements was very good. However, an anomaly in the flow field caused the wake behind the stainless steel ribbons to establish itself in a stable manner on one side of the model. This same stability was not present for the nylon ribbon model although an average wake velocity data indicated an apparent 2° upwash in the wind tunnel flow field. Since flow angularity upstream of the model was not measured, the use of the data for code validation is not recommended without a second experiment to establish that upstream boundary condition.
Download or read book Investigation of the Flow Field During the Inflation of Clustered Parachutes written by R. J. Niccum and published by . This book was released on 1966 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Clustered parachutes during the period of inflation were simulated by elliptical cylinders in potential flow and so-called O'Hara shape parachutes in water flow and wind tunnel experiments. The results are presented in the form of streamline and pressure distribution plots around the respective bodies. Results show that when geometric symmetry is disturbed, the flow field becomes unsymmetrical and strong attractive or repulsive forces are developed. This allows a variety of inflation modes to occur and, hence, poor cluster opening performance.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1993 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1997 with total page 940 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 1987 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA SP written by and published by . This book was released on 1990 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book AIAA Student Journal written by American Institute of Aeronautics and Astronautics 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 Near field Wake of a Generic Round Parachute Canopy in Steady Flow written by K. J. Desabrais and published by . This book was released on 2001 with total page 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 1990 with total page 540 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 Aeronautical Engineering A Cumulative Index to a Continuing Bibliography supplement 248 written by and published by . This book was released on 1990 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book AIAA Journal written by American Institute of Aeronautics and Astronautics and published by . This book was released on 1998 with total page 1224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Engineering Index Annual written by and published by . This book was released on 1989 with total page 2152 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since its creation in 1884, Engineering Index has covered virtually every major engineering innovation from around the world. It serves as the historical record of virtually every major engineering innovation of the 20th century. Recent content is a vital resource for current awareness, new production information, technological forecasting and competitive intelligence. The world?s most comprehensive interdisciplinary engineering database, Engineering Index contains over 10.7 million records. Each year, over 500,000 new abstracts are added from over 5,000 scholarly journals, trade magazines, and conference proceedings. Coverage spans over 175 engineering disciplines from over 80 countries. Updated weekly.
Download or read book Aerodynamic Drag written by Sighard F. Hoerner and published by . This book was released on 1951 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aeronautical Engineering A Cumulative Index to a Continuing Bibliography supplement 235 written by and published by . This book was released on 1989 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:
