Author: Israel Wygnanski
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
"Experiments have been made on a thin, two-dimensional aerofoil with sharp leading edge and with a jet blowing through a mid-chord slot on the upper surface for boundary-layer and circulation control.The measurements were made at low Mach number and included the effect of altering the angle of blowing for it was anticipated that this would help control the leading edge separation bubble.It was found that variation of the blowing angle caused very little change in lift coefficient but produced an appreciable change in moment coefficient. With the jet discharging at an angle and subsequently reattaching to the surface a separation bubble of low pressure was formed downstream of the slot which reduced the nose-up pitching moment about the guarter-chord point. The reattachment distances for this bubble have been successfully predicted by an extension of the Bourque-Newman theory for reattaching jets. The lift and moment coefficients before the stall were compared with Spence's jet flap theory which has been extended within the context of thin aerofoil theory, to include the effect of jet entrainment. It is predicted that the entrainment tends to increase the lift by increasing the effective camber of the aerofoil and the detailed agreement between this theory and experiment is good." --
Theoretical and Experimental Investigation of Blowing Applied to an Aerofoil with a Sharp Leading Edge
Author: Israel Wygnanski
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
"Experiments have been made on a thin, two-dimensional aerofoil with sharp leading edge and with a jet blowing through a mid-chord slot on the upper surface for boundary-layer and circulation control.The measurements were made at low Mach number and included the effect of altering the angle of blowing for it was anticipated that this would help control the leading edge separation bubble.It was found that variation of the blowing angle caused very little change in lift coefficient but produced an appreciable change in moment coefficient. With the jet discharging at an angle and subsequently reattaching to the surface a separation bubble of low pressure was formed downstream of the slot which reduced the nose-up pitching moment about the guarter-chord point. The reattachment distances for this bubble have been successfully predicted by an extension of the Bourque-Newman theory for reattaching jets. The lift and moment coefficients before the stall were compared with Spence's jet flap theory which has been extended within the context of thin aerofoil theory, to include the effect of jet entrainment. It is predicted that the entrainment tends to increase the lift by increasing the effective camber of the aerofoil and the detailed agreement between this theory and experiment is good." --
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
"Experiments have been made on a thin, two-dimensional aerofoil with sharp leading edge and with a jet blowing through a mid-chord slot on the upper surface for boundary-layer and circulation control.The measurements were made at low Mach number and included the effect of altering the angle of blowing for it was anticipated that this would help control the leading edge separation bubble.It was found that variation of the blowing angle caused very little change in lift coefficient but produced an appreciable change in moment coefficient. With the jet discharging at an angle and subsequently reattaching to the surface a separation bubble of low pressure was formed downstream of the slot which reduced the nose-up pitching moment about the guarter-chord point. The reattachment distances for this bubble have been successfully predicted by an extension of the Bourque-Newman theory for reattaching jets. The lift and moment coefficients before the stall were compared with Spence's jet flap theory which has been extended within the context of thin aerofoil theory, to include the effect of jet entrainment. It is predicted that the entrainment tends to increase the lift by increasing the effective camber of the aerofoil and the detailed agreement between this theory and experiment is good." --
Experimental Investigation of a 5% Thick Aerofoil with Sharp Leading and Trailing Edges, and Blowing Applied at the Mid-chord Point at Two Angles Relative to the Surface
Author: McGill University. Mechanical Engineering Research Laboratories
Publisher:
ISBN:
Category :
Languages : en
Pages : 42
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 42
Book Description
An Experimental Study of the Effects of Leading-edge Blowing Upon the Characteristics of a Jet-flapped Airfoil
Author: Timothy Wang
Publisher:
ISBN:
Category : Aerofoils
Languages : en
Pages : 312
Book Description
Publisher:
ISBN:
Category : Aerofoils
Languages : en
Pages : 312
Book Description
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 704
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 704
Book Description
Technical Abstract Bulletin
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 866
Book Description
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 866
Book Description
U.S. Government Research & Development Reports
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1014
Book Description
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1014
Book Description
Investigation of Leading-edge Blowing on a Thin Airfoil
Author: Gustave W. Schwartz
Publisher:
ISBN:
Category :
Languages : en
Pages : 90
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 90
Book Description
The Effects of Blowing Over Various Trailing-edge Flaps on an NACA 0006 Airfoil Section, Comparisons with Various Types of Flaps on Other Airfoil Sections, and an Analysis of Flow and Power Relationships for Blowing Systems
Author: Jules B. Dods (Jr.)
Publisher:
ISBN:
Category : Aerofoils
Languages : en
Pages : 145
Book Description
The investigation reported herein consists of three phases: (1) an experimental investigation of a thin airfoil with blowing over a trailing-edge flap; (2) a comparison of the results of the experimental investigation with the results of other similar investigations; and (3) a theoretical study of the relationships among the air-flow and power parameters for the general blowing case.
Publisher:
ISBN:
Category : Aerofoils
Languages : en
Pages : 145
Book Description
The investigation reported herein consists of three phases: (1) an experimental investigation of a thin airfoil with blowing over a trailing-edge flap; (2) a comparison of the results of the experimental investigation with the results of other similar investigations; and (3) a theoretical study of the relationships among the air-flow and power parameters for the general blowing case.
An Experimental Investigation of the Leading Edge Separation Bubble
Author: Anthony Vincent Arena
Publisher:
ISBN:
Category :
Languages : en
Pages : 320
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 320
Book Description
Canadian Theses
Author: National Library of Canada
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 678
Book Description
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 678
Book Description