Three Dimensional Effects In Propeller Theory
DOWNLOAD
Download Three Dimensional Effects In Propeller Theory PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Three Dimensional Effects In Propeller Theory book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
Three Dimensional Effects In Propeller Theory
DOWNLOAD
Author : O.W. Hölby
language : en
Publisher:
Release Date : 1970
Three Dimensional Effects In Propeller Theory written by O.W. Hölby and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with categories.
Three Dimensional Effects In Propeller Theory
DOWNLOAD
Author : Ove W. Höiby
language : en
Publisher:
Release Date : 1970
Three Dimensional Effects In Propeller Theory written by Ove W. Höiby and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Propellers categories.
A Three Dimensional Theory For The Ducted Propeller At Angle Of Attack
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1965
A Three Dimensional Theory For The Ducted Propeller At Angle Of Attack written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with categories.
An inviscid theory is developed for the steady aerodynamic loading on a ducted propeller in forward flight at angle of attack. As a first approximation, the problem is regarded as the superposition of the given ducted propeller at zero incidence and a cylindrical duct of the same aspect ratio but of zero thickness and camber at the given incidence. This approximation is then improved to include the cyclic variation of the blade loading. Not only are the normal force and pitching moment changed but also a finite side force and yawing moment, unknown heretofore, are found. Explicit formulas are given to carry out numerical calculations and a limited comparison with experimental results show good agreement.
A Differential Prediction Method For Three Dimensional Laminar And Turbulent Boundary Layers Of Rotating Propeller Blades
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1985
A Differential Prediction Method For Three Dimensional Laminar And Turbulent Boundary Layers Of Rotating Propeller Blades written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with categories.
A general mathematical formulation is given for the three dimensional boundary-layer flow on a rotating propeller blade. The basic equations are presented in a nonorthogonal coordinate system which rotates with the blade. Finite difference methods are used to develop a computer code for solving the laminar and turbulent boundary-layer equations. The Reynolds stress tensor is modeled by an algebraic eddy-viscosity formulation. In general, the equations are solved numerically using the standard Keller box method. However, regions of flow reversal across the boundary-layer are computed by the characteristics box method. A companion geometry computer code, developed to model propeller geometry characteristics, and an existing inviscid flow code for computing propeller blade pressures are combined with the boundary-layer computer code to form an efficient computation scheme. For a given potential-flow solution, a typical boundary-layer solution of 690 grid points requires 64 seconds CPU time on a CYBER 176 computer. Computed results are presented for several propeller blade geometries. The rotating segment solution compares well with analytical and experimental data. Predictions for a model propeller also compare favorably with experimental data and illustrate that two-dimensional theory may provide adequate predictions for applications where crossflow effects are not important. Geometry effects of warp and skew are shown to be small for the boundary-layer predictions on three model propellers.
The Application Of Three Dimensional Wing Theory To The Analysis Of Marine Propeller Performance
DOWNLOAD
Author : M. R. Ullah
language : en
Publisher:
Release Date : 1984
The Application Of Three Dimensional Wing Theory To The Analysis Of Marine Propeller Performance written by M. R. Ullah and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with categories.
Unsteady Lifting Surface Theory For A Marine Propeller Of Low Pitch Angle With Chordwise Loading Distribution
DOWNLOAD
Author : Stavros Tsakonas
language : en
Publisher:
Release Date : 1964
Unsteady Lifting Surface Theory For A Marine Propeller Of Low Pitch Angle With Chordwise Loading Distribution written by Stavros Tsakonas and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1964 with Hydrodynamics categories.
This study is third in a series of investigations applying the unsteady lifting surface theory to the marine propeller case. In this investigation, the surface integral equation is solved for a mathematical model where the chordwise loading is taken as the first term of Birnbaum's lift distribution (flat-plate chordwise distribution), in conjunction with Glauert's lift operator, which, in essence, satisfies the chordwise boundary conditions by a weighted average. It is shown that this model is an improvement over the modified Weissinger model used previously in this series, because it contains as a nucleus the exact two-dimensional solution, and thus it provides a sounder basis for dtermining the three-dimensional effects. The blade-loading is determined for a propeller operating in flow disturbanccs induced by the presence of a hull and by the blade-camber effect. The stationary loading obtained by the present model is about 10% less than that obtained by the modified Weissinger model, whereas the nonstationary loading is slightly larger. (Author).
The Unsteady Loading On A Propeller In Nonuniform Flow
DOWNLOAD
Author : Michael D. Greenberg
language : en
Publisher:
Release Date : 1964
The Unsteady Loading On A Propeller In Nonuniform Flow written by Michael D. Greenberg and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1964 with Air flow categories.
Three Dimensional Theory Of Ducted Propellers
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1960
Three Dimensional Theory Of Ducted Propellers written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1960 with categories.
An Experimental And Theoretical Study On Cavitating Propellers
DOWNLOAD
Author : Okitsugu Furuya
language : en
Publisher:
Release Date : 1982
An Experimental And Theoretical Study On Cavitating Propellers written by Okitsugu Furuya and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with categories.
The original objective of the present work was to develop an analytical tool for predicting the off-design performance of supercavitating propellers over a wide range of operating conditions. Due to the complex nature of the flow phenomena, a lifting line theory simply combined with the two-dimensional supercavitating cascade theory was selected. Results of this simple method provided surprisingly accurate predictions for the performance at fully developed cavitating conditions. It was indicative that the fully-developed, supercavitating propellers had strong cascade effects on their performance, and also that the three-dimensional, propeller geometry corrections could properly be made by the lifting-line theory. As was expected, however, the predicted thrust and power coefficient curves with this propeller theory showed a significant deviation from experimental data in the range of advance speeds J's larger than designed advance speeds where the partially cavitating conditions are expected to occur. effort was then made to improve the prediction capability of the above propeller theory at partially cavitating conditions. A new nonlinear partially cavitating cascade theory was developed to provide a proper 2-D loading basis under such conditions. A slight improvement on the prediction capability of the propeller theory was achieved with the new set of data, but not to a satisfactory extent.
Three Demensional Effects In Propeller Theory
DOWNLOAD
Author : Ove W. Hoiby
language : en
Publisher:
Release Date : 1970
Three Demensional Effects In Propeller Theory written by Ove W. Hoiby and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with categories.