Sound Measurements for Five Shrouded Propellers at Static Conditions PDF Download
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Author: Harvey H. Hubbard
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 36
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Book Description
Sound-pressure measurements are reported for five shrouded propellers and are compared with those for an unshrouded propeller operating at approximately the same rotational speed and power. The maximum total sound pressure produced by a two-blade shrouded propeller is found to vary approximately from one-half to twice as much as that for an unshrouded two-blade propeller, depending on whether the flow at the shroud surface is unseparated or separated, respectively. Shroud chord is found not to be critical except insofar as the areodynamic considerations are affected. In general, if the shroud-propeller unit satisfies aerodynamic requirements, good sound characteristics will also be obtained.
Author: Harvey H. Hubbard
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 36
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Book Description
Sound-pressure measurements are reported for five shrouded propellers and are compared with those for an unshrouded propeller operating at approximately the same rotational speed and power. The maximum total sound pressure produced by a two-blade shrouded propeller is found to vary approximately from one-half to twice as much as that for an unshrouded two-blade propeller, depending on whether the flow at the shroud surface is unseparated or separated, respectively. Shroud chord is found not to be critical except insofar as the areodynamic considerations are affected. In general, if the shroud-propeller unit satisfies aerodynamic requirements, good sound characteristics will also be obtained.
Author: United States. National Advisory Committee for Aeronautics
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1136
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Book Description
Author:
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 24
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Book Description
Author: United States. National Advisory Committee for Aeronautics
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 988
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Book Description
Includes the Committee's Technical reports no. 1-1058, reprinted in v. 1-37.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 620
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Author: United States. National Advisory Committee for Aeronautics
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 996
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Book Description
Author: Th. Von Kármán
Publisher: Elsevier
ISBN: 1483223361
Category : Technology & Engineering
Languages : en
Pages : 591
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Book Description
Advances in Aeronautical Sciences, Volume 2 contains the proceedings of the First International Congress in the Aeronautical Sciences, held in Madrid, Spain in September 1958. The book is comprised of survey papers and original contributions that discuss common problems in aeronautics and in space technology. The text presents interesting articles that deals with topics on the fundamental design problems of aircraft with boundary layer control for maintaining laminar flow; developments in hypersonic flow research; structures and materials for finite lifetime; and propulsion methods in astronautics. Aeronautics engineers and scientists in allied fields will find the book invaluable.
Author: Wayne Johnson
Publisher: Courier Corporation
ISBN: 0486131823
Category : Technology & Engineering
Languages : en
Pages : 1122
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Book Description
Monumental engineering text covers vertical flight, forward flight, performance, mathematics of rotating systems, rotary wing dynamics and aerodynamics, aeroelasticity, stability and control, stall, noise, and more. 189 illustrations. 1980 edition.
Author: United States. National Advisory Committee for Aeronautics
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 498
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 750
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Book Description
