Download or read book Flow Visualization Studies of VTOL Aircraft Models During Hover in Ground Effect Nikos J Mourtos Et Al NASA Ames Research Center January 1995 written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flow Visualization Techniques for Flight Research written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-03 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: In-flight flow visualization techniques used at the Dryden Flight Research Facility of NASA Ames Research Center (Ames-Dryden) and its predecessor organizations are described. Results from flight tests which visualized surface flows using flow cones, tufts, oil flows, liquid crystals, sublimating chemicals, and emitted fluids have been obtained. Off-surface flow visualization of vortical flow has been obtained from natural condensation and two methods using smoke generator systems. Recent results from flight tests at NASA Langley Research Center using a propylene glycol smoker and an infrared imager are also included. Results from photo-chase aircraft, onboard and postflight photography are presented. Fisher, David F. and Meyer, Robert R., Jr. Ames Research Center RTOP 505-68-71...
Download or read book Flow Visualization Workshop Report written by William C. Ragsdale and published by . This book was released on 1972 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: A workshop on flow visualization and flow measurement techniques was held at Silver Spring, Maryland, on 21 and 22 October 1971 and co-sponsored by the Naval Air Systems Command and the Naval Ordnance Laboratory. The objective of this meeting was to provide a forum for technical discussions on new and improved flow visualization and flow measurement techniques. Discussion of the application of new techniques to flow problems associated with turbo-machinery, aircraft and missiles was included. (Author).
Download or read book Interactive Collaborative Learning written by Michael E. Auer and published by Springer. This book was released on 2016-12-31 with total page 647 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the proceedings of the 19th International Conference on Interactive Collaborative Learning, held 21-23 September 2016 at Clayton Hotel in Belfast, UK. We are currently witnessing a significant transformation in the development of education. The impact of globalisation on all areas of human life, the exponential acceleration of developments in both technology and the global markets, and the growing need for flexibility and agility are essential and challenging elements of this process that have to be addressed in general, but especially in the context of engineering education. To face these topical and very real challenges, higher education is called upon to find innovative responses. Since being founded in 1998, this conference has consistently been devoted to finding new approaches to learning, with a focus on collaborative learning. Today the ICL conferences have established themselves as a vital forum for the exchange of information on key trends and findings, and of practical lessons learned while developing and testing elements of new technologies and pedagogies in learning.
Download or read book Flow Visualization Techniques And Examples written by Tee Tai Lim and published by World Scientific. This book was released on 2000-09-04 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: Throughout history, flow visualization has been an important tool in fluid dynamics research. It has been used extensively in the fields of engineering, physics, medical science, meteorology, oceanography and sport aerodynamics, to name just a few. The importance of flow visualization led Professor F N M Brown (1971) of the University of Notre-Dame to comment, “… A man is not a dog to smell out each individual track, he is a man to see, and seeing, to analyze…” This statement encapsulates the importance of first visualizing the flow before proceeding with detailed measurement and mathematical modeling. In addition, there is a great deal of esthetic pleasure to be gained from seeing the results of flow visualization. This aspect of flow visualization reaches out to the general public: we are all familiar with the aspect of clouds in the sky, the trail of cigarette smoke, and the swirling patterns to be seen in rivers and seas.Unlike previous publications which concentrated mainly on the theoretical aspect of flow visualization, this book focuses on the techniques required to perform high quality flow visualization. It is aimed primarily at the practitioner of flow visualization studies. Obtaining good flow visualization results is, in many ways, more an art than a science, and experience plays a deciding role. Hence each chapter of this invaluable volume has been written by an expert in a particular technique./a
Download or read book Flow Visualization by Elastic Light Scattering in the Boundary Layer of a Supersonic Flow written by G. C. Herring and published by DIANE Publishing. This book was released on 2000 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: We demonstrate instantaneous flow visualization of the boundary layer region of a Mach 2.5 supersonic flow over a flat plate that is interacting with an impinging shock wave. Tests were performed in the Unitary Plan Wind Tunnel (UPWT) at NASA Langley Research Center. The technique is elastic light scattering using 10-nsec laser pulses at 532 nm. We emphasize that no seed material of any kind, including water (H2O), is purposely added to the flow. The scattered light comes from a residual impurity that normally exists in the flow medium after the air drying process. Thus, the technique described here differs from the traditional vapor-screen method, which is typically accomplished by the addition of extra H2O vapor to the airflow. The flow is visualized with a series of thin two-dimensional light sheets (oriented perpendicular to the streamwise direction) that are located at several positions downstream of the leading edge of the model. This geometry allows the direct observation of the unsteady flow structure in the spanwise dimension of the model and also allows the indirect observation of the boundary layer growth in the streamwise dimension.
Download or read book Flow Visualization Studies of Blowing from the Tip of a Swept Wing written by Jeannette W. Smith and published by . This book was released on 1990 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flow visualization and interpretation of visualization data for deflected thrust V STOL nozzles written by Hsiao C. Kao and published by . This book was released on 1984 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flow Visualization Studies of a Fin Protuberance Partially Immersed in a Turbulent Boundary Layer at Mach 5 written by Allen Edward Winkelmann and published by . This book was released on 1970 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Various flow-visualization results are presented for a cylindrically blunted, unswept fin (yawed and unyawed) partially immersed in a turbulent boundary layer (delta approx. = 2.6 inches). The model, consisting of a fin-flat plate combination, was tested at a nominal Mach number of 5 and nominal free-stream Reynolds numbers per foot of 2800 000 and 7400 000. Azobenzene tests show regions of high heat transfer on the flat plate immediately upstream and downstream of the fin. Oil smear tests show in detail the surface shear directions and locations of separated flow which occur on the model. Schlieren and shadowgraph photographs indicate the complex shock wave structure which exists in front of the fin. A possible flow-field model is suggested to account for the observed flow patterns. (Author).
Download or read book Research on Vtol Water Hover Effects Including the Effects of Wind and Waves written by Keith R. Marsh and published by . This book was released on 1968 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: Very little is known about the problems associated with a VTOL aircraft hovering over a water surface. Some of the more important of these unknown effects appear to be the effects of surface winds and waves on the stability and control characteristics of the hovering airplane, the effects of the airplane's downwash on the water surface, and the effects of surface winds and waves on the spray generated by the airplane's downwash. In order to examine these seemingly more important effects, a special model testing facility has been built. This facility permits a model simulating a hovering airplane to be tested as the facility generates waves of variable heights and lengths on the water surface below the model test station. The facility can also generate a surface wind. During this test a model of a tilting VTOL airplane with four propellers was tested as it simulated hover at varying heights and disk loadings above the variable water surface conditions. The effects of water waves on the forces and moments felt by the hovering model were found to be negligible, and the effects of the surface wind on the forces and moments were found to be as would be predicted with a negligible effect of waves even with the surface wind. By contrast, it was found that the waves and the surface wind both had significant effects on the effects of the airplane's downwash on the water surface and the spray generated around the model. Comparison of some of the spray patterns found in this test program with results of full scale airplane tests indicate that these results of the model tests correlate well with the limited data available from the actual airplane tests. (Author).
