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Application Of Theodorsens Propeller Theory To The Calculation Of The Performance Of Dual Rotating Propellers
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Book Synopsis Application of Theodorsen's Propeller Theory to the Calculation of the Performance of Dual-rotating Propellers by : Jean Gilman
Download or read book Application of Theodorsen's Propeller Theory to the Calculation of the Performance of Dual-rotating Propellers written by Jean Gilman and published by . This book was released on 1951 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: Theodorsen's propeller theory is used to calculate the performance of a dual-rotating propeller having nonideal load distributions. The application of this theory to either performance or design calculations of dual-rotating propellers is found to involve a modification to the value of the mass coefficient, which is shown to be affected by the ratio of the spinner radius to the propeller radius. The effect is very important and, since it has not been considered in previous work on this subject, the required modification and the method of application is explained in the present paper.
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 Optimization and Performance Calculation of Dual-rotation Propellers by : Robert E. Davidson
Download or read book Optimization and Performance Calculation of Dual-rotation Propellers written by Robert E. Davidson and published by . This book was released on 1981 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summary: Values of the circulation function have been obtained for dual-rotating propellers. Numerical values are given for four-, eight-, and twelve-blade dual-rotating propellers and for advance ratios from 2 to about 6. In addition, the circulation function has been determined for single-rotating propellers for the higher values of the advance ratio. The mass coefficient, another quantity of significance in propeller theory, has been introduced. This mass coefficient, which is actually the mean value of the circulation coefficient, expresses the effective area of the column of the medium acted upon by the propeller in terms of the propeller-disk area. Values of the mass coefficient, which have been determined directly by special measurements and also by integration of the circulation function, are given for the four-, eight-, and twelve-blade dual-rotating propellers. The mass coefficient has also been determined for several cases of single-rotating propellers, partly for the purpose of comparing such experimental values with theoretical results in the known range of low advance ratios and partly to extend the results to include a range of high advance ratios. The effect of stationary countervanes on the mass coefficient has also been determined for several cases of practical interest.
Book Synopsis Advanced Turboprop Project by : Roy D. Hager
Download or read book Advanced Turboprop Project written by Roy D. Hager and published by . This book was released on 1988 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Optimization and Performance Calculation of Dual-rotation Propellers by : Robert E. Davidson
Download or read book Optimization and Performance Calculation of Dual-rotation Propellers written by Robert E. Davidson and published by . This book was released on 1981 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Index of NACA Technical Publications by : United States. National Advisory Committee for Aeronautics
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 1955 with total page 1338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Method of Calculating Performance of Dual-rotating Propellers from Airfoil Characteristics by : Irven Naiman
Download or read book Method of Calculating Performance of Dual-rotating Propellers from Airfoil Characteristics written by Irven Naiman and published by . This book was released on 1943 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: A method developed for calculating the performance of a dual-rotating propeller from the section characteristics of the blade elements. The method is applied to an eight-blade dual-rotating propeller and the computed results are compared with low-speed wind-tunnel tests of the same propeller in both the tractor and the pusher positions. The computations are found to agree within the experimental accuracy of the measurements. A detailed step-by-step procedure for the computations is given in an appendix.
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 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summary: As the conditions of the ultimate wake are of concern both theoretically and practically, the magnitude of the slipstream contraction has been calculated. It will be noted that the contraction in a representative case is of the order of only 1 percent of the propeller diameter. In consequence, all calculations need involve only first-order effects. Curves and tables are given for the contraction coefficient of two-blade and four-blade propellers for various values of the advance ratio; the contraction coefficient is defined as the contraction in the diameter of the wake helix in terms of the wake diameter at infinity. The contour lines of the wake helix are also shown at four values of the advance ratio in comparison with the contour lines for an infinite number of blades.
Book Synopsis A Selected Listing of NASA Scientific and Technical Reports for ... by :
Download or read book A Selected Listing of NASA Scientific and Technical Reports for ... written by and published by . This book was released on 1949 with total page 664 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 1992 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Technical Paper written by and published by . This book was released on 1981 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Research Abstracts by : United States. National Advisory Committee for Aeronautics
Download or read book Research Abstracts written by United States. National Advisory Committee for Aeronautics and published by . This book was released on with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Research Abstracts and Reclassification Notice by : United States. National Advisory Committee for Aeronautics
Download or read book Research Abstracts and Reclassification Notice written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1954 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Summary of Propeller Design Procedures and Data: Aerodynamic design and installation by :
Download or read book Summary of Propeller Design Procedures and Data: Aerodynamic design and installation written by and published by . This book was released on 1973 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Thrust, Energy, and Efficiency Formulas for Single-and Dual-rotation Propellers with Ideal Circulation Distribution by : Theodore Theodorsen
Download or read book Thrust, Energy, and Efficiency Formulas for Single-and Dual-rotation Propellers with Ideal Circulation Distribution written by Theodore Theodorsen and published by . This book was released on 1944 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: Simple and exact expressions are given for the efficiency of single and dual rotating propellers with ideal circulation distribution as given by the Goldstein functions for single-rotating propellers and by the new functions for dual-rotating propellers from Part 1 of the present series. The efficiency is shown to depend primarily on a defined load factor and, to a very small extent, on an axial loss factor. Tables and charts are included for practical use of the results.