Author: Jean Fabri
Publisher:
ISBN:
Category : Aerodynamics, Supersonic
Languages : en
Pages : 640
Book Description
In this paper a propeller having all sections operating at supersonic speeds is designated a supersonic propeller regardless of flight speed. Analyses assume subsonic flight speeds but very high rotational speeds. A very elementary analysis of the efficiency of a jet-propeller system is presented. A propeller analysis based on conventional vortex blade element theory is presented and reduced to a single point method which leads to an expression for optimum advance ratio in terms of hub-tip diameter ratio and airfoil fineness ratio. An expression for propeller efficiency in terms of advance ratio, hub-tip diameter ratio, and airfoil thickness ratio is also presented. Use is made of theoretical airfoil characteristics at supersonic speeds. A study of blade section interference, blade shock and expansion fields, at supersonic section speeds is presented. An example taken indicates that an efficiency of seventy percent can be obtained with a propeller having a tip Mach number of 2.3.
Study of the Supersonic Propeller
Author: Jean Fabri
Publisher:
ISBN:
Category : Aerodynamics, Supersonic
Languages : en
Pages : 640
Book Description
In this paper a propeller having all sections operating at supersonic speeds is designated a supersonic propeller regardless of flight speed. Analyses assume subsonic flight speeds but very high rotational speeds. A very elementary analysis of the efficiency of a jet-propeller system is presented. A propeller analysis based on conventional vortex blade element theory is presented and reduced to a single point method which leads to an expression for optimum advance ratio in terms of hub-tip diameter ratio and airfoil fineness ratio. An expression for propeller efficiency in terms of advance ratio, hub-tip diameter ratio, and airfoil thickness ratio is also presented. Use is made of theoretical airfoil characteristics at supersonic speeds. A study of blade section interference, blade shock and expansion fields, at supersonic section speeds is presented. An example taken indicates that an efficiency of seventy percent can be obtained with a propeller having a tip Mach number of 2.3.
Publisher:
ISBN:
Category : Aerodynamics, Supersonic
Languages : en
Pages : 640
Book Description
In this paper a propeller having all sections operating at supersonic speeds is designated a supersonic propeller regardless of flight speed. Analyses assume subsonic flight speeds but very high rotational speeds. A very elementary analysis of the efficiency of a jet-propeller system is presented. A propeller analysis based on conventional vortex blade element theory is presented and reduced to a single point method which leads to an expression for optimum advance ratio in terms of hub-tip diameter ratio and airfoil fineness ratio. An expression for propeller efficiency in terms of advance ratio, hub-tip diameter ratio, and airfoil thickness ratio is also presented. Use is made of theoretical airfoil characteristics at supersonic speeds. A study of blade section interference, blade shock and expansion fields, at supersonic section speeds is presented. An example taken indicates that an efficiency of seventy percent can be obtained with a propeller having a tip Mach number of 2.3.
Noise Survey of a Full-scale Supersonic Turbine-driven Propeller Under Static Conditions
Author: Max C. Kurbjun
Publisher:
ISBN:
Category : Noise
Languages : en
Pages : 742
Book Description
Overall sound-pressure levels and frequency spectra of the noise emitted from a full-scale, 7.2-foot-diameter, 3, 500 rpm, three-blade, supersonic propeller mounted on a turbine-powered airplane have been obtained under static conditions at stations about the propeller at a 100-foot radius.
Publisher:
ISBN:
Category : Noise
Languages : en
Pages : 742
Book Description
Overall sound-pressure levels and frequency spectra of the noise emitted from a full-scale, 7.2-foot-diameter, 3, 500 rpm, three-blade, supersonic propeller mounted on a turbine-powered airplane have been obtained under static conditions at stations about the propeller at a 100-foot radius.
Flight Investigation of a Supersonic Propeller on a Propeller Research Vehicle at Mach Numbers to 1.01
Author: Jerome B. Hammack
Publisher:
ISBN:
Category : Aerodynamics, Supersonic
Languages : en
Pages : 43
Book Description
A description is given of an NACA propeller research vehicle, the McDonnell XF-88B airplane, capable of testing governing propellers up to and slightly above Mach numbers of 1.0. Altitudes up to 40,000 feet are attainable. Propellers up to 10 feet in diameter can be tested with a maximum power input of 2,500 brake horsepower at two rotational speeds. The airplane is instrumented to obtain aerodynamic and structural data.
Publisher:
ISBN:
Category : Aerodynamics, Supersonic
Languages : en
Pages : 43
Book Description
A description is given of an NACA propeller research vehicle, the McDonnell XF-88B airplane, capable of testing governing propellers up to and slightly above Mach numbers of 1.0. Altitudes up to 40,000 feet are attainable. Propellers up to 10 feet in diameter can be tested with a maximum power input of 2,500 brake horsepower at two rotational speeds. The airplane is instrumented to obtain aerodynamic and structural data.
Preliminary Design Study of a Centrifugal Jet Engine With a Supersonic Propeller.
Author: Arthur D Struble
Publisher: Hassell Street Press
ISBN: 9781014231123
Category :
Languages : en
Pages : 240
Book Description
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Publisher: Hassell Street Press
ISBN: 9781014231123
Category :
Languages : en
Pages : 240
Book Description
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Aerodynamic Tip Theory of a Supersonic Propeller
Author: Cornell University. Graduate School of Aeronautical Engineering
Publisher:
ISBN:
Category : Aerodynamics, Supersonic
Languages : en
Pages : 168
Book Description
Publisher:
ISBN:
Category : Aerodynamics, Supersonic
Languages : en
Pages : 168
Book Description
The Aerodynamic Design of Supersonic Propellers from Structural Considerations
Author: Jerome B. Hammack
Publisher:
ISBN:
Category : Aerodynamics, Supersonic
Languages : en
Pages : 682
Book Description
The aerodynamic design of propellers from considerations of centrifugal force is presented. A solution is obtained for the span wise distribution of cross-sectional area required to attain constant centrifugal stress over most of the blade.
Publisher:
ISBN:
Category : Aerodynamics, Supersonic
Languages : en
Pages : 682
Book Description
The aerodynamic design of propellers from considerations of centrifugal force is presented. A solution is obtained for the span wise distribution of cross-sectional area required to attain constant centrifugal stress over most of the blade.
Theoretical Investigation of the Performance of a Supersonic Propeller
A Parametric Investigation of an Existing Supersonic Relative Tip Speed Propeller Noise Model
Advanced Turboprop Project
Author: Roy D. Hager
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 140
Book Description
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 140
Book Description