# Drag & Lift Notes | Study Mechanical Engineering SSC JE (Technical) - Mechanical Engineering

## Mechanical Engineering: Drag & Lift Notes | Study Mechanical Engineering SSC JE (Technical) - Mechanical Engineering

The document Drag & Lift Notes | Study Mechanical Engineering SSC JE (Technical) - Mechanical Engineering is a part of the Mechanical Engineering Course Mechanical Engineering SSC JE (Technical).
All you need of Mechanical Engineering at this link: Mechanical Engineering

DRAG AND LIFT

• The component of the force parallel to the direction of flow is called the drag & normal component is called the lift. 
• Friction drag - when flow occurs past a flat surface at zero incidence, the fluid exerts a drag-force on the surface known as friction drag which is in downstream direction. 
• Pressure drag - when flow occurs past a surface which is not everywhere parallel to the fluid stream a drag force results on account of difference of pressure over the body surface, known as pressure drag. 
• Stream lined body has friction drag only whereas Bluff body has pressure drag only 
• Total drag on the sphere is about one-third of the drag for the disc. 
• Coefficient of drag and lift  Flow at very small Reynolds number is known as the creeping motion  Boundary Layer Parameters in Laminar Conditions

Boundary Layer thickness (d) = Displacement thickness (d*) = Momentum thickness (q) = Local friction drag coefficient Cd* = Average friction drag coefficient Cd =

Shear stress to = •  Boundary Layer Parameters in Turbulent Conditions   • The drag which depends upon profile and orientation of the airfoil, known as profile drag, whereas drag which depends upon the airfoil plan form & is induced by the lift force is known as induced force. 
• The phenomenon of lift produced by imposing circulation over a uniform fluid steam is known as Magnus effect.
The document Drag & Lift Notes | Study Mechanical Engineering SSC JE (Technical) - Mechanical Engineering is a part of the Mechanical Engineering Course Mechanical Engineering SSC JE (Technical).
All you need of Mechanical Engineering at this link: Mechanical Engineering Use Code STAYHOME200 and get INR 200 additional OFF

## Mechanical Engineering SSC JE (Technical)

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