Supersonic Aerodynamics Module 1 Quiz 1

Fluid's property to resist shear stress

• Potential Flow

• Viscosity

• Skidding

• Reynold's Number

Type of Flow that is assumed to involve no friction, thermal conduction or diffusion

• Inviscid Flow

• Viscous Flow

• Laminar Flow

• Flow Separation

Location where Laminar flow turns to Turbulent Flow

• Boundary Layer

• X Critical

• Transition Point

• Stalling Angle

How many flow field can air be divided into regions?

• 2 - (Boundary Layer and Potential Flow)

• 2 - (Boundary Layer and Transition Point)

• 2 - (Laminar and Turbulent Flow)

• 2 - (Potential Flow and Flow Separation)

Pressure Drag due to Separation

• Flow Separation

• Skin Friction Drag

• Stall

• Reynold's Number

When does Secondary Stall Occur?

• Too much Angle of Attack

• If recovery from an original stall is successful, a secondary stall follows

• Imposing negative load on the wing

• Caused by attempting to hasten the completion of a stall recovery

It determines whether the flow in a body is aerodynamically similar to its scaled model

• Boundary Layer

• Reynold's Number

• Flow separation

• Stalling Angle

Also known as powered on stall

• Critical Stalling Angle

• Departure Stall

• Arrival Stall

• Accelerated Stall

What happens to a viscosity of a liquid if Temperature Increases

• Viscosity Decreases

• Viscosity Increases

• Viscosity Stays the Same

• Directly proportional to Temperature

How does flow separation occur?

• Imbalance of pressure forces below the surface of the airfoil

• Imbalance of pressure forces above the surface of the airfoil

• Exceeding Critical Stalling Angle

• Not enough lift is produced