Accession Number:

ADA191168

Title:

Instability of Laminar Separation Bubbles: Causes and Effects.

Descriptive Note:

Technical rept. Mar-Sep 87,

Corporate Author:

DOUGLAS AIRCRAFT CO LONG BEACH CA

Personal Author(s):

• Cebeci, Tuncer

Report Date:

1987-09-01

Pagination or Media Count:

16.0

Abstract:

A combination of interactive boundary layer and stability theories has been used to investigate the reasons for the instability of laminar separation bubbles on the leading edge of thin airfoils. It is shown that transition plays an important role and is likely to preclude the existence of long separation bubbles and their supposed instability. Keywords Interactive boundary-layer theory, Laminar flow, Separation, Transition.

Descriptors:

• *AIRFOILS
• *BOUNDARY LAYER
• *FLOW SEPARATION
• *LAMINAR FLOW
• BUBBLES
• INTERACTIONS
• LEADING EDGES
• SEPARATION
• STABILITY
• THEORY
• THINNESS

Subject Categories:

• Aerodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE