Experimental Studies Of Tandem Propeller Performance At Static Conditions

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Experimental Studies Of Tandem Propeller Performance At Static Conditions

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Author : Roy S. Rice
language : en
Publisher:
Release Date : 1968

Experimental Studies Of Tandem Propeller Performance At Static Conditions written by Roy S. Rice and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Propellers categories.

Nbs Special Publication

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Author :
language : en
Publisher:
Release Date : 1971

Nbs Special Publication written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with Weights and measures categories.

Report

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Author : United States. National Bureau of Standards
language : en
Publisher:
Release Date : 1968

Report written by United States. National Bureau of Standards and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Hydraulic engineering categories.

Current Hydraulic Laboratory Research In The United States

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Author :
language : en
Publisher:
Release Date : 1970

Current Hydraulic Laboratory Research In The United States written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Hydraulic engineering categories.

Hydraulic Research In The United States And Canada

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Author :
language : en
Publisher:
Release Date : 1972

Hydraulic Research In The United States And Canada written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972 with Hydraulic engineering categories.

Hydraulic Research In The United States 1970

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Author : United States. National Bureau of Standards
language : en
Publisher:
Release Date : 1971

Hydraulic Research In The United States 1970 written by United States. National Bureau of Standards and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with Hydraulic engineering categories.

Effects Of Configurational Changes On Tandam Propeller Performance

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Author : William G. Wilson
language : en
Publisher:
Release Date : 1965

Effects Of Configurational Changes On Tandam Propeller Performance written by William G. Wilson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with Propellers categories.

An Experimental Investigation Of The Static Performance And Transition Characteristics Of A Small Scale Vtol Propeller

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Author : Vincent Michael Paglino
language : en
Publisher:
Release Date : 1964

An Experimental Investigation Of The Static Performance And Transition Characteristics Of A Small Scale Vtol Propeller written by Vincent Michael Paglino and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1964 with Propellers, Aerial categories.

A Procedure For The Design Of Tandem Propellers

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Author : Stephen B. Denny
language : en
Publisher:
Release Date : 1974

A Procedure For The Design Of Tandem Propellers written by Stephen B. Denny and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with categories.

A procedure is outline in this report for the design of tandem propellers. The specific tandem propeller arrangement discussed with be two propellers operating one behind the other, on the same shaft with the same rotational speed and direction of rotation. The specific design procedure discussed will be for the tandem unit operating in uniform inflow but the logic involved would be directly extendable to the wake adapted design case. A tandem propeller unit designed using this method was constructed and evaluated in open-water experiments. The performance data, presented herein, shows that the unit produced the desired thrust at the design revolution rate and that the open-water efficiency was as good as, or better than, a single propeller carrying the same load at the same operating conditions. The ability to design tandem propeller units which meet prescribed performance criteria and which operate at acceptable propeller efficiencies could have considerable impact on ship powering technology. Tandem propellers can be applied to ships with high delivered horsepower, where vibration and cavitation erosion are anticipated problems, and where the physical constraints make a tandem arrangement attractive. (Author).

An Experimental Investigation Of The Effect Of Forward And Rearward Motion On The Thrust Of A Shrouded Propeller

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Author : Joe F Thompson (Jr)
language : en
Publisher:
Release Date : 1966

An Experimental Investigation Of The Effect Of Forward And Rearward Motion On The Thrust Of A Shrouded Propeller written by Joe F Thompson (Jr) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1966 with categories.

Experimental evidence of the existence of a stagnation line between the leading and trailing edges on the outer surface of the shroud of a shrouded propeller in the static condition, in rearward motion, and in forward motion is presented. This stagnation line on the outer surface, which is a result of viscous interaction between the propeller slipstream and the external flow, causes a reduction in shroud circulation below that calculated by distributed singularities methods which assume a stagnation line at the trailing edge only. Shroud thrust decreases as the distance between this stagnation line and the trailing edge increases. It is shown that in rearward motion, such as is the case for a VTOL aircraft landing, the stagnation line moves forward from the vicinity of the trailing edge to the vicinity of the leading edge as vehicle speed increases. This forward movement of the stagnation line results in a significant loss in thrust, which can be correlated with the stagnation line location. Shroud pressure distribution, stagnation line location, and shroud thrust are presented for all three cases of motion at several propeller pitch angles, propeller rotational speeds, and vehicle linear speeds. It is shown that the flow pattern about the shroud is rather complicated in rearward motion, involving two coaxial ring-vortices surrounding the shroud. (Author).