Definition - ‘Force’ Definition – ‘Aerodynamic Force’ Fundamental sources of

Aerodynamic Force Pressure Distribution Shear Stress Types of Flows

Equation of Continuity Bernoulli’s Theorem / Application Flat Plate Effect

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Definitions ‘Force’ ‘Aerodynamic Force’

Fundamental sources of Aerodynamic Force Pressure Distribution Shear Stress Types of Flows Equation of Continuity Bernoulli’s Theorem / Application Flat Plate Effect Conclusion

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Introduction: Aerodynamics Basics

F16 pushes the F16 pushes the ground by 28000 lbs ground by 28000 lbs

and the ground and the ground pushes the a/c by pushes the a/c by

28000 lbs28000 lbs

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Contact force / Surface force

Distance force / Body force

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Frictional Force

Tensional Force

Air Resistance Force

Applied Force

Spring Force

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Gravitational Force

Electrical Force

Magnetic Force

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Vector =Magnitude + Direction

350 Kts350 KtsHeading 345°Heading 345°

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Balanced force

Unbalanced force

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Force exerted on a body whenever there is a

relative velocity between the body and the

air

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Pressure Distribution

Shear Stress

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Pressure

Density

Temperature

Flow Velocity and Streamlines

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Speed and direction of gas may vary from point to point in the flow

The velocity at any fixed point B in a flowing gas is the velocity of an infinitesimally small fluid element as it sweeps through B

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Steady Streamline

Two Dimensional

Three Dimensional

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Flow parameters (speed, direction, pressure

variable)

May vary from point to point in the flow but

At any point are constant with respect to time

Classical Linear: More or less, streamlines follow

body contour without separation

Controlled Separated / LE Vortex Flow (at Hi

AOA) LE vortex on highly swept plan-forms, and

A strong controlled vortex (at a sharp LE) is made to produce

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