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Investigation Of Impingement Region And Wall Jets Formed By The Interaction Of High Aspect Ratio Lift Jets And A Ground Plane
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Book Synopsis Investigation of Impingement Region and Wall Jets Formed by the Interaction of High Aspect Ratio Lift Jets and a Ground Plane by :
Download or read book Investigation of Impingement Region and Wall Jets Formed by the Interaction of High Aspect Ratio Lift Jets and a Ground Plane written by and published by . This book was released on 1978 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of the Interaction of Lift Jets and a Ground Plane by :
Download or read book Investigation of the Interaction of Lift Jets and a Ground Plane written by and published by . This book was released on 1980 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental Investigation of Jet Impingement on Surfaces of Fine Particles in a Vacuum Environment by : Norman S. Land
Download or read book Experimental Investigation of Jet Impingement on Surfaces of Fine Particles in a Vacuum Environment written by Norman S. Land and published by . This book was released on 1965 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 902 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of the Flow-field of Two Parallel Round Jets Impinging Normal to a Flat Surface by : Leighton Myers
Download or read book Investigation of the Flow-field of Two Parallel Round Jets Impinging Normal to a Flat Surface written by Leighton Myers and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The flow-field features of dual jet impingement were investigated through sub-scale model experiments. The experiments were designed to simulate the environment of a Short Takeoff, and Vertical Landing, STOVL, aircraft performing a hover over the ground, at different heights. Two different dual impinging jet models were designed, fabricated, and tested. The Generation 1 Model consisted of two stainless-steel nozzles, each with an exit diameter of approximately 12.7 mm. The front convergent nozzle was operated at NPR = 1.89 (Mj = 1.0), TTR = 1.0, while the rear C-D nozzle was generally operated over a range of NPR = 1.89 to NPR = 2.93 (Mj = 1.34), TTR = 1.0. The nozzles were embedded in a rectangular flat plate, referred to as the lift plate, which represented a generic lifting surface. The lift plate was instrumented with 36 surface pressure taps, which were used to examine the flow entrainment and recirculation patterns caused by varying the stand-off distance from the nozzle exits to a flat ground surface. The stand-off distance was adjusted with a sliding rail frame that the ground plane was mounted to. Typical stand-off distances, (ground plane separation), were H/D = 2 to 24.A series of measurements were performed with the Generation 1 model, in the Penn State High Speed Jet Aeroacoustics Laboratory, to characterize the basic flow phenomena associated with dual jet impingement. The regions of interest in the flow-field included the vertical jet plume(s), near impingement/turning region, and wall jet outwash. Other aspects of interest included the loss of lift (suckdown) that occurs as the ground plane separation distance becomes small, and azimuthal variation of the acoustic noise radiation. Various experimental methods and techniques were used to characterize the flow-field, including flow-visualization, pressure rake surveys, surface mounted pressure taps, laser Doppler velocimetry, and acoustic microphone arrays.A second dual impinging jet scale model, Generation 2, was designed and fabricated with a 50% increase in nozzle exit diameter. The primary design improvement is the ability to quickly and easily exchange the nozzles of the model. This allowed experiments to be performed with rapid-prototyped nozzles that feature more realistic geometry to that of tactical military aircraft engines. One such nozzle, which was designed and demonstrated by previous researchers to reduce jet noise in a free-jet, was incorporated into the model. The nozzle, featuring deflected seals, was installed in the Generation 2 model and its effect on suckdown was evaluated.
Book Synopsis The Flow Development and Heat Transfer Characteristics of Plane Turbulent Impinging Jets by : J. J. Schauer
Download or read book The Flow Development and Heat Transfer Characteristics of Plane Turbulent Impinging Jets written by J. J. Schauer and published by . This book was released on 1963 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Anjaneyulu Krothapalli Publisher :Springer Science & Business Media ISBN 13 :1461249724 Total Pages :752 pages Book Rating :4.4/5 (612 download)
Book Synopsis Recent Advances in Aerodynamics by : Anjaneyulu Krothapalli
Download or read book Recent Advances in Aerodynamics written by Anjaneyulu Krothapalli and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 752 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Joint Institute for Aeronautics and Acoustics at Stanford University was established in October 1973 to provide an academic environment for long-term cooperative research between Stanford and NASA Ames Research Center. Since its establishment, the In stitute has wnducted theoretical and experimental work in the areas of aerodynamics, acoustics, fluid mechanics, flight dynamics, guid ance and control, and human factors. This research has involved Stanford faculty, research associates, graduate students, and many distinguished visitors in collaborative efforts with the research staff of NASA Ames Research Center. The occasion of the Institute's tenth anniversary was used to reflect back on where that research has brought us, and to consider where our endeavors should be directed next. Thus, an International Symposium was held to review recent advances in the fields relevant to the activities of the Institute and to discuss the areas of research to be undertaken in the future. This anniversary was also chosen a.."1 an opportunity to honor one of the Institute's founders and its di rector, Professor Krishnamurty Karamcheti. It has been his creative inspiration that has provided the ideal research environment at the Joint Institute. The International Symposium on Recent Advances in Aero dynamics and Aconstics was held at Stanford University, Stanford, California, U.S.A., August 22-26, 198:~. Thirty-five distinguished scientists were invited to present a comprehensive review on the fol lowing subject areas: unsteady aerodynamics, jets and shear layers, V /STOL aircraft aerodynamics, rotor dynamics and aerodynamics,.
Book Synopsis Recirculation Effects Produced by a Pair of Heated Jets Impinging on a Ground Plane by : Gordon R. Hall
Download or read book Recirculation Effects Produced by a Pair of Heated Jets Impinging on a Ground Plane written by Gordon R. Hall and published by . This book was released on 1969 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Experimental Investigation of a Wall Jet Interacting with a Shear Flow by : Sanjib K. Mukherji
Download or read book An Experimental Investigation of a Wall Jet Interacting with a Shear Flow written by Sanjib K. Mukherji and published by . This book was released on 1972 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Impingement Tones of Large Aspect Ratio Supersonic Rectangular Jets by : Christopher K. W. Tam
Download or read book Impingement Tones of Large Aspect Ratio Supersonic Rectangular Jets written by Christopher K. W. Tam and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of the Recirculation Region of a Flow Field Caused by a Jet in Ground Effect with Crossflow by : T. W Binion (Jr)
Download or read book Investigation of the Recirculation Region of a Flow Field Caused by a Jet in Ground Effect with Crossflow written by T. W Binion (Jr) and published by . This book was released on 1970 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: A wind tunnel investigation was conducted in the Low Speed Wind Tunnel (V/STOL) to determine the velocities in the recirculation region of the flow field produced by the interaction of a jet impinging on a ground plane with crossflow. Axial and vertical velocity component measurements were obtained with a forward-scattering laser Doppler velocimeter. Test results provide two- component velocity fields and indicate that the jet-to-free-stream velocity ratio is much more important in determining the flow field than the magnitude of the individual velocities.
Book Synopsis Investigation of the Interaction of a Jet with Screens Located Near by : O. V. Yakovlevskii
Download or read book Investigation of the Interaction of a Jet with Screens Located Near written by O. V. Yakovlevskii and published by . This book was released on 1966 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: Some results are presented of the investigation of flows brought about by the expansion of a turbulent jet close to the surface of a solid body (screen). A problem of this kind arises, for example, in industrial ventilation, in the dividing up of an onflow among sections, in the study of 'near earth' effects which cause a reduction in the lifting force of the jets of aircraft of vertical takeoff and landing. (Author).
Book Synopsis Special Course on Subsonic/transonic Aerodynamic Interference for Aicraft by :
Download or read book Special Course on Subsonic/transonic Aerodynamic Interference for Aicraft written by and published by . This book was released on 1983 with total page 1204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Strut and Wall Interference on Jet-induced Ground Effects of a STOVL Aircraft in Hover by : Michael H. Kristy
Download or read book Strut and Wall Interference on Jet-induced Ground Effects of a STOVL Aircraft in Hover written by Michael H. Kristy and published by . This book was released on 1995 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: A small scale ground effect test rig was used to study the ground plane flow field generated by a STOVL aircraft in hover. The objective of the research was to support NASA-Ames Research Center planning for the Large Scale Powered Model (LSPM) test for the ARPA-sponsored ASTOVL program. Specifically, small scale oil flow visualization studies were conducted to make a relative assessment of the aerodynamic interference of a proposed strut configuration and a wall configuration on the ground plane stagnation line. A simplified flat plate model representative of a generic jet-powered STOVL aircraft was used to simulate the LSPM. Cold air jets were used to simulate both the lift fan and the twin rear engines. Nozzle Pressure Ratios were used that closely represented those used on the LSPM tests. The flow visualization data clearly identified a shift in the stagnation line location for both the strut and the wall configuration. Considering the experimental uncertainty, it was concluded that either the strut configuration or the wall configuration caused only a minor aerodynamic interference. Distribution.
Book Synopsis On the Interaction of Wall Jets and Fountain Formation by : K. T. Yen
Download or read book On the Interaction of Wall Jets and Fountain Formation written by K. T. Yen and published by . This book was released on 1979 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: An analysis of the fountain formation produced by the vertical impingement of two jets on a flat-ground surface is presented. A method has been developed for the determination of the upwash angle of the fountain in the plans of symmetry and the ground stagnation line. Comparison of the calculated results from the present analysis with tests data obtained by the Grumman Aerospace Corporation shows generally good agreement. The different methods of approach and results in some recent works regarding the upwash angle are discussed, and it is shown that the fountain should leave the ground surface in direction perpendicular to it, and approach the upwash angle asymptotically. (Author).
Book Synopsis Velocity Irregularities in the Near Field of High Aspect Ratio Turbulent Jets by : Charles N Eastlake (II.)
Download or read book Velocity Irregularities in the Near Field of High Aspect Ratio Turbulent Jets written by Charles N Eastlake (II.) and published by . This book was released on 1972 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: An extensive investigation has been made to determine the cause of irregularities in the near field velocity profiles of turbulent jets issuing from rectangular openings of high aspect ratio. These irregularities are seen to persist for about two exit major diameters downstream. Various means of reducing the nonuniformities are documented, but it does not seem possible to produce completely smooth profiles from orifices or nozzles of this small scale (minor diameter = .060 inch) without manufacturing processes beyond normal tolerances. (Author).
Download or read book NASA SP. written by and published by . This book was released on 1992 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt:
