Numerical Investigation on Effects of Hub Taper Angle and Pod-strut Geometry on Propulsive Performance of Pusher Propeller Configurations PDF Download
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Author: Mohammed Fakhrul Islam
Publisher:
ISBN:
Category : Hydrodynamics
Languages : en
Pages : 272
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Author: Mohammed Fakhrul Islam
Publisher:
ISBN:
Category : Hydrodynamics
Languages : en
Pages : 272
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Book Description
Author: John Carlton
Publisher: Butterworth-Heinemann
ISBN: 0081003749
Category : Technology & Engineering
Languages : en
Pages : 612
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Book Description
Marine Propellers and Propulsion, Fourth Edition, offers comprehensive, cutting edge coverage to equip marine engineers, naval architects or anyone involved in propulsion and hydrodynamics with essential job knowledge. Propulsion technology is a complex, multidisciplinary topic with design, construction, operational and research implications. Drawing on experience from a long and varied career in consulting, research, design and technical investigation, John Carlton examines hydrodynamic theory, materials and mechanical considerations, and design, operation and performance. Connecting essential theory to practical problems in design, analysis and operational efficiency, the book is an invaluable resource, packed with hard-won insights, detailed specifications and data. - Features comprehensive coverage of marine propellers, fully updated and revised, with new chapters on propulsion in ice and high speed propellers - Includes enhanced content on full-scale trials, propeller materials, propeller blade vibration, operational problems and much more - Synthesizes otherwise disparate material on the theory and practice of propulsion technology from the past 40 years' development, including the latest developments in improving efficiency - Written by a leading expert on propeller technology, essential for students, marine engineers and naval architects involved in propulsion and hydrodynamics
Author: Rocky Scott Taylor
Publisher:
ISBN:
Category : Propellers
Languages : en
Pages :
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Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 316
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Book Description
"Education, arts and social sciences, natural and technical sciences in the United States and Canada".
Author: Mohammed Fakhrul Islam
Publisher:
ISBN:
Category :
Languages : en
Pages : 492
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Book Description
Author: Carl A. Sandahl
Publisher:
ISBN:
Category : Aerodynamic load
Languages : en
Pages : 50
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Book Description
Summary: Some of the effects of pusher-propeller operation on the aerodynamic characteristics of a flapped wing were measured in the Langley propeller-research tunnel. The effects of propeller operation on the lift and profile drag of the wing, on pressure distribution, and on the position of boundary-layer transition were obtained. The results indicated that, at fixed angles of attack and with flaps deflected, the wing lift increased appreciably with increasing thrust coefficient. With flaps retracted, no appreciable increase in lift with increases in thrust coefficient was measured. Chordwise pressure distributions at several spanwise stations indicated that the effect of propeller operation was greatest in the region immediately ahead of the propeller and that the effect extended out-board from the propeller axis for about 2.5 propeller radii. Measurements of boundary-layer velocity on the forward part of the upper surface of the wing showed no appreciable shift of transition in the range of thrust coefficients investigated.
Author: S. J. Miley
Publisher:
ISBN:
Category : Airframes
Languages : en
Pages : 192
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Book Description
A literature survey was performed to identify and review technical material applicable to the problem area of propeller propulsion system integration. The survey covered only aerodynamic interference aspects of the problem, and was restricted primarily to propeller effects on the airframe. The subject of airframe aerodynamic interference on the propeller was limited to the problem of vibration due to nonuniform inflow. The problem of airframe effects on propeller performance was not included. A total of 1121 references are given. The references are grouped into the subject areas of Aircraft Stability, Propulsive Efficiency, Aerodynamic Interference, Aerodynamic Interference-Propeller Vibration, and Miscellaneous.
Author: M. H. Wang
Publisher:
ISBN:
Category :
Languages : en
Pages : 382
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Book Description
A numerical model is established for the design of propeller blade shape for a prescribed circulation and a given hub geometry. The vortex lattice approach is adapted for blades and their wakes. The hub is represented by a distribution of dipoles which ends at the hub apex. It is shown that consideration of the hub results in a lower pitch and lower camber at the inner radii. An iterative method is developed for analyzing the interference between the blades and the hub. It is shown that the circulation at the root of a propeller with a hub. It is shown that the circulation at the root of a propeller with a hub is larger than the circulation at the root of a propeller without a hub. Two examples show that the increase in thrust due to hub effects has the same order of magnitude as the drag force effects on the hub for propellers which are moderately loaded at the hub. Experiments are carried out for comparison with the numerical results. Excellent agreement is obtained in the circulation distribution for a conventional propeller, and fair agreement for a controllable pitch propeller. Experimental results show what the circulation is, roughly speaking, conserved. A method for estimating the drag force of the hub due to the hub vortex is established by assuming that the circulation is conserved.
Author: Stan J. Miley
Publisher:
ISBN:
Category : Airframes
Languages : en
Pages : 194
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Book Description
Author: F. M. Catalano
Publisher:
ISBN:
Category :
Languages : en
Pages :
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