Download or read book Use of Freon 12 as a Fluid for Aerodynamic Testing written by Paul William Huber and published by . This book was released on 1946 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: The thermodynamic properties of Freon-12 have been investigated to determine the possibilities of the use of this gas as a fluid for aerodynamic testing. The values of valocity of sound in Freon-12, which are less than one half those in air, are presented as functions of temperatures and pressure, including measurements at room temperature. The density of Freon-12 is about four times that of air. Changes in state of Freon-12 may be predicted by means of the ideal gas law with an accuracy of better than 1 percent at pressures below 1 atmosphere at room temperature. Freon-12 is shown not to condense during an adiabatic expansion from normal conditions up to a Mach numbr of 3. The values of the ratio of specific heats for Freon-12 are lower than for air, and therefore an additional parameter is introduced, which must be considered when comparisons are made of aerodynamic tests using Freon-12 with those using air.
Download or read book Studies of the Use of Freon 12 as a Wind tunnel Testing Medium written by Albert E. Von Doenhoff and published by . This book was released on 1953 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt: A number of studies relating to the use of Freon-12 as a substitute medium for air in aerodynamic testing have been made. The use of Freon-12 instead of air makes possible large savings in wind-tunnel drive power. Because of the fact that the ratio of specific heats is approximately 1.13 for Freon-12 as compared with 1.4 for air, some differences exist between data obtained in Freon-12 and air. Methods for predicting aerodynamic characteristics of bodies in air from data obtained in Freon-12, however, have been developed from the concept of similarity of the streamline pattern. These methods, derived from consideration of two-dimensional flows, provide substantial agreement in all cases for which comparative data are available. These data consist of measurements throughout a range of Mach number from approximately 0.4 to 1.2 of pressure distributions and hinge moments on swept and unswept wings having aspect ratios ranging from 4.0 to 9.0, including cases where a substantial part of the wing was stalled.
Download or read book NASA Technical Note written by and published by . This book was released on 1976 with total page 910 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studies of the Use of Freon 12 as a Testing Medium in the Langley Low turbulence Pressure Tunnel written by Albert E. Von Doenhoff and published by . This book was released on 1951 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Note written by and published by . This book was released on 1946 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Note National Advisory Committee for Aeronautics written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1946 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aerodynamic Loads on a Leading edge Flap and a Leading edge Slat on the NACA 64A010 Airfoil Section written by John A. Kelly and published by . This book was released on 1954 with total page 706 pages. Available in PDF, EPUB and Kindle. Book excerpt: A previous report, NACA TN 3007, gave force and moment data for the NACA 64A010 airfoil section equipped alternately with a flap and a slat at the leading edge, and with a split flap and a double-slotted flap at the trailing edge. The present report presents the chordwise distributions of pressure measured concurrently with the force and moment data of NACA 3007. The pressure data for the leading-edge flap and slat have been converted into coefficients of normal force, chord force, and moment based on the geometry of the leading-edge device.
Download or read book United States Government Publications Monthly Catalog written by and published by . This book was released on 1946 with total page 1718 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Facilities and Techniques for Aerodynamic Testing at Transonic Speeds and High Reynolds Number written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Fluid Dynamics Panel and published by . This book was released on 1971 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: In September 1968, the FDP of AGARD held a specialists' meeting in Paris on transonic aerodynamics, in recognition of the fact that the absence of adequate theoretical methods and wind-tunnels of high enough Reynolds number had already led to costly shortcomings in the transonic performance of certain combat and transport aircraft. Since projected aerospace systems, military, civil and space-oriented, would involve flight at Reynolds number of up to 100 million, the FDP undertook an examination of the requirements of NATO nations for wind tunnel facilities for testing large models at high Reynolds numbers.
Download or read book An Analysis of the Stability and Ultimate Compressive Strength of Short Sheet stringer Panels with Special Reference to the Influence of the Riveted Connection Between Sheet and Stringer written by Benjamin H. Beam and published by . This book was released on 1955 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research Abstracts written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1951 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book United States Government Publications a Monthly Catalog written by United States. Superintendent of Documents and published by . This book was released on 1946 with total page 1808 pages. Available in PDF, EPUB and Kindle. Book excerpt: February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index.
Download or read book Experimental Aerodynamics written by Stefano Discetti and published by CRC Press. This book was released on 2017-03-16 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental Aerodynamics provides an up to date study of this key area of aeronautical engineering. The field has undergone significant evolution with the development of 3D techniques, data processing methods, and the conjugation of simultaneous measurements of multiple quantities. Written for undergraduate and graduate students in Aerospace Engineering, the text features chapters by leading experts, with a consistent structure, level, and pedagogical approach. Fundamentals of measurements and recent research developments are introduced, supported by numerous examples, illustrations, and problems. The text will also be of interest to those studying mechanical systems, such as wind turbines.
Download or read book Index of NACA Technical Publications written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1949 with total page 1370 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Correlation of full scale helicopter rotor performance in air with model scale freon data written by William T. Yeager and published by . This book was released on 1976 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1956 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report written by and published by . This book was released on 1955 with total page 962 pages. Available in PDF, EPUB and Kindle. Book excerpt:
