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Design And Performance Calculations Of A Propeller For Very High Altitude Flight Nasa Tm 1998 206637 Apr 7 1998
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Book Synopsis Agile Manufacturing Systems by : K Hans Raj
Download or read book Agile Manufacturing Systems written by K Hans Raj and published by ALPHA SCIENCE INTERNATIONAL LIMITED. This book was released on 2011-12-17 with total page 917 pages. Available in PDF, EPUB and Kindle. Book excerpt: Agility has become very important for the industries today as the lifetimes of the products are continuously shrinking. This book provides an excellent opportunity for updating understanding of agile methods from the design, manufacturing and business process perspectives, whether one is an industrial practitioner, academic researcher engineer or business graduate student. This volume is a compilation of various important aspects of agility consisting of systemic considerations in manufacturing, agile software systems, agile business systems, agile operations research, flexible manufacturing systems, advanced manufacturing systems with improved materials and mechanical behavior of products, agile aspects of design, clean and green manufacturing systems, environment, agile defence systems.
Book Synopsis The Theory of Propellers by : Theodore Theodorsen
Download or read book The Theory of Propellers written by Theodore Theodorsen and published by . This book was released on 1944 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summary: A technical method is given for calculating the axial interference velocity of a propeller. The method involves the use of certain weight functions P, Q, and F. Numerical values for the weight functions are given for two-blade, three-blade, and six-blade propellers.
Book Synopsis The Elements of Aerofoil and Airscrew Theory by : Hermann Glauert
Download or read book The Elements of Aerofoil and Airscrew Theory written by Hermann Glauert and published by . This book was released on 1926 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis TAIR: A Transonic Airfoil Analysis Computer Code by : F. Carroll Dougherty
Download or read book TAIR: A Transonic Airfoil Analysis Computer Code written by F. Carroll Dougherty and published by . This book was released on 1981 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781723015083 Total Pages :132 pages Book Rating :4.0/5 (15 download)
Book Synopsis Design and Performance Calculations of a Propeller for Very High Altitude Flight. Degree Awarded by Case Western Univ. by : National Aeronautics and Space Administration (NASA)
Download or read book Design and Performance Calculations of a Propeller for Very High Altitude Flight. Degree Awarded by Case Western Univ. written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-17 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reported here is a design study of a propeller for a vehicle capable of subsonic flight in Earth's stratosphere. All propellers presented were required to absorb 63.4 kW (85 hp) at 25.9 km (85,000 ft) while aircraft cruise velocity was maintained at Mach 0.40. To produce the final design, classic momentum and blade-element theories were combined with two and three-dimensional results from the Advanced Ducted Propfan Analysis Code (ADPAC), a numerical Navier-Stokes analysis code. The Eppler 387 airfoil was used for each of the constant section propeller designs compared. Experimental data from the Langley Low-Turbulence Pressure Tunnel was used in the strip theory design and analysis programs written. The experimental data was also used to validate ADPAC at a Reynolds numbers of 60,000 and a Mach number of 0.20. Experimental and calculated surface pressure coefficients are compared for a range of angles of attack. Since low Reynolds number transonic experimental data was unavailable, ADPAC was used to generate two-dimensional section performance predictions for Reynolds numbers of 60,000 and 100,000 and Mach numbers ranging from 0.45 to 0.75. Surface pressure coefficients are presented for selected angles of attack. in addition to the variation of lift and drag coefficients at each flow condition. A three-dimensional model of the final design was made which ADPAC used to calculated propeller performance. ADPAC performance predictions were compared with strip-theory calculations at design point. Propeller efficiency predicted by ADPAC was within 1.5% of that calculated by strip theory methods, although ADPAC predictions of thrust, power, and torque coefficients were approximately 5% lower than the strip theory results. Simplifying assumptions made in the strip theory account for the differences seen. Koch, L. Danielle Glenn Research Center PROPELLERS; PROPELLER EFFICIENCY; PERFORMANCE PREDICTION; LOW REYNOLDS NUMBER; AERODYNAMIC COEFFICIENTS; NAVIER-STOKES EQUATION; N...
Download or read book Aerodynamics written by Clancy and published by . This book was released on 2006-06-15 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Product of the authors many years experience as a teacher of aerodynamics, this book will fill the need for a comprehensive and up-to-date text for first degree students studying aeronautical or mechanical engineering. Its attractive presentation also makes it suitable for student pilots, technicians and those studying the subject below degree level. The Book covers fundamentals and applications and both low-speed and high speed aerodynamics. The author has not sacrificed mathematical rigour in order to simplify-instead, explanation has been clarified by including, wherever possible, physical description of the various phenomena side by side with analytical treatments. A special feature is the large number of simple diagrams, closely keyed to the text, which present information in an easy digested from but without oversimplification.
Book Synopsis North Dakota's Forest Resources, 1994 by :
Download or read book North Dakota's Forest Resources, 1994 written by and published by . This book was released on 1999 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Utah, Southern Utah's High Country by :
Download or read book Utah, Southern Utah's High Country written by and published by . This book was released on 1999 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781726197267 Total Pages :30 pages Book Rating :4.1/5 (972 download)
Book Synopsis Airships for Planetary Exploration by : National Aeronautics and Space Administration (NASA)
Download or read book Airships for Planetary Exploration written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-29 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: The feasibility of utilizing an airship for planetary atmospheric exploration was assessed. The environmental conditions of the planets and moons within our solar system were evaluated to determine their applicability for airship flight. A station-keeping mission of 50 days in length was used as the baseline mission. Airship sizing was performed utilizing both solar power and isotope power to meet the baseline mission goal at the selected planetary location. The results show that an isotope-powered airship is feasible within the lower atmosphere of Venus and Saturn s moon Titan.Colozza, AnthonyGlenn Research CenterAIRSHIPS; VENUS ATMOSPHERE; SOLAR POWERED AIRCRAFT; SPACE EXPLORATION; PLANETARY ATMOSPHERES; TITAN; ISOTOPES...
Download or read book Export Certification Manual written by and published by . This book was released on 1995 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Senate Treaty Documents written by and published by Government Printing Office. This book was released on 1986 with total page 1028 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aircraft Propeller Design by : Fred Ernest Weick
Download or read book Aircraft Propeller Design written by Fred Ernest Weick and published by . This book was released on 1930 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: En lærebog om flypropeller.
Book Synopsis Wildlife Resource Trends in the United States by : Curtis H. Flather
Download or read book Wildlife Resource Trends in the United States written by Curtis H. Flather and published by . This book was released on 1999 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Welcome-- to the Coronado National Forest by :
Download or read book Welcome-- to the Coronado National Forest written by and published by . This book was released on 1990 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781720385196 Total Pages :36 pages Book Rating :4.3/5 (851 download)
Book Synopsis Apex 3D Propeller Test Preliminary Design by : National Aeronautics and Space Administration (NASA)
Download or read book Apex 3D Propeller Test Preliminary Design written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-20 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: A low Reynolds number, high subsonic mach number flight regime is fairly uncommon in aeronautics. Most flight vehicles do not fly under these aerodynamic conditions. However, recently there have been a number of proposed aircraft applications (such as high altitude observation platforms and Mars aircraft) that require flight within this regime. One of the main obstacles to flight under these conditions is the ability to reliably generate sufficient thrust for the aircraft. For a conventional propulsion system, the operation and design of the propeller is the key aspect to its operation. Due to the difficulty in experimentally modeling the flight conditions in ground-based facilities, it has been proposed to conduct propeller experiments from a high altitude gliding platform (APEX). A preliminary design of a propeller experiment under the low Reynolds number, high mach number flight conditions has been devised. The details of the design are described as well as the potential data that will be collected.Colozza, Anthony J.Glenn Research CenterTHREE DIMENSIONAL MODELS; LOW REYNOLDS NUMBER; PROPELLERS; SUBSONIC SPEED; PERFORMANCE TESTS; EXPERIMENT DESIGN; FLIGHT CONDITIONS; GLIDING; HIGH ALTITUDE; MACH NUMBER; OBSERVATION AIRCRAFT; PROPULSION
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781725572805 Total Pages :34 pages Book Rating :4.5/5 (728 download)
Book Synopsis Summary and Recent Results from the NASA Advanced High Speed Propeller Research Program by : National Aeronautics and Space Administration (NASA)
Download or read book Summary and Recent Results from the NASA Advanced High Speed Propeller Research Program written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-14 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced high-speed propellers offer large performance improvements for aircraft that cruise in the Mach 0.7 to 0.8 speed regime. The current status of the NASA research program on high-speed propeller aerodynamics, acoustics, and aeroelastics is described. Recent wind tunnel results for five 8- to 10-blade advanced models are compared with analytical predictions. Test results show that blade sweep was important in achieving net efficiencies near 80 percent at Mach 0.8 and reducing near-field cruise noise by dB. Lifting line and lifting surface aerodynamic analysis codes are under development and some initial lifting line results are compared with propeller force and probe data. Some initial laser velocimeter measurements of the flow field velocities of an 8-bladed 45 deg swept propeller are shown. Experimental aeroelastic results indicate that cascade effects and blade sweep strongly affect propeller aeroelastic characteristics. Comparisons of propeller near-field noise data with linear acoustic theory indicate that the theory adequate predicts near-field noise for subsonic tip speeds but overpredicts the noise for supersonic tip speeds. Potential large gains in propeller efficiency of 7 to 11 percent at Mach 0.8 may be possible with advanced counter-rotation propellers. Mitchell, G. A. and Mikkelson, D. C. Glenn Research Center NASA-TM-82891, E-1269, NAS 1.15:82891 RTOP 535-03-12...
Book Synopsis WIC Infant Feeding Practices Study by :
Download or read book WIC Infant Feeding Practices Study written by and published by . This book was released on 1997 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results from a one-year longitudinal study of infant feeding practices over the first year of life.
