aerodynamics basic
TRANSCRIPT
Linear Motion
Aerodynamics
(Moving Air )
Fundamentals of Physics
Basic Quantities
Charge - Electro-magneticMatter - Mass
TimeSpace - Length
Combinations of Basics
Velocity =
Density =
Force =
LengthTime
Mass
Length
2
Mass Length
Time
3
Momentum =Time
Mass Length
Derived Quantities
Dimensionality
Energy =Time
Mass Length 2
2
Laws of Physics Observations of the Relations between Derived Quantities
Fundamentals of Aerodynamics (Fluid Dynamics)
Used in Aerodynamics
Velocity =
Density = Force =
LengthTime
Mass
Length 2
Mass Length
Time
3
Momentum =Time
Mass Length
Derived Quantities
Dimensionality
Energy =Time
Mass Length 2
2
Pressure =2
Mass
Length
ForceArea
=
Time
Mass Flow = MassTime
Torque =2
Mass Length
Time
2
Temperature – Basic or Derived ?
Density -> mass and volume
Pressure -> momentum (mass x velocity) Temperature -> kinetic energy (mass x velocity )
2
Conservation Laws Observations of the Relations between Derived Quantities
For any fluid system:
1) Mass is neither created nor destroyed. Conservation of Mass - Continuity
2) Momentum is neither created nor destroyed. Conservation of Momentum (3 directions) 3) Energy is neither created nor destroyed. Conservation of Energy
mass mass mass x velocity
mass x velocity
mass x velocity
mass x velocity 2
2
Mass Flow Rate
r
r
r
Stability – Three Axes
Stability
Forces on an Aircraft
Air
Air
Aircraft
AircraftAir Moves Past the Aircraft
Aircraft Moves Through the Air
Measured Forces Have The Same Value
Equivalent