Method and apparatus for influencing a laminar turbulent boundary layer transition on bodies in flow

US4989810A · kind A · utility

Assignee

• Deutsche Forschungs- und Versuchsanstalt fur Luft- und Raumfahrt e.V. · DE

Inventors

• Hans-Ulrich Meier · Essen, DE
• Alois Maier · Waldkraiburg, DE
• Ming de Zhou · Nanjing, CN

Key dates

• Filing date: Nov 17, 1988
• Grant date: Feb 5, 1991
• Expiry date: Nov 17, 2008

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T50/10
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A method and an apparatus for influencing a laminar-turbulent boundary layer transition on bodies in flow is indicated. The disturbances are in this case introduced into the boundary layer in an unsteady manner. The disturbances are induced by blowing-out and sucking-off and/or by oscillations of the surface and/or by sound pressure.