Aerodynamic Preliminaries

Question 1

What are the characteristics of laminar flow?

Answer 1

1. Smooth particle trajectories (= streamlines)
2. Dominated by viscous effects
3. 1D, 2D or 3D
4. Steady or unsteady

Question 2

What are the characteristics of turbulent flow?

Answer 2

1. Chaotic particle trajectories
2. Streamlines based on average velocity field
3. Dominated by inertial effects
4. Always 3D
5. Always unsteady

Question 3

Reynolds Number Eq & What Does Low and High Reynolds Number indicate

Answer 3

Re = (ρ * v * h)/μ
Low Re → viscous forces dominate → Laminar flow
High Re → inertial forces dominate → Turbulent flow

Question 4

Bernoulli Eq

Answer 4

pA + 1/2 ρvA^2 = pB + 1/2 ρvB^2