Flight Mechanics - Exam 1
Study online at https://quizlet.com/_h6woq4
1. Lift Upward aerodynamic force
2. Drag Backward aerodynamic force
3. Thrust Propulsive force
4. Weight downward body force
5. Pressure force per unit area due to gas molecules
6. Density mass per unit volume
7. Temperature average kinetic energy of molecules
8. Velocity A vector with magnitude and direction
9. Streamline a curve tangent to the flow velocity vector. mass flow is conserved between stream-
lines.
10. Continuity equa- mass flow rate is the same at any cross section in the stream tube due to conser-
tion vation of mass
11. Euler's equation velocity does not change with time.
in steady flow
12. Purpose of stan- to compare aircraft performance at consistent, reference atmospheric conditions.
dard atmosphere
13. What is the range h <- 36,089 ft
of the tropos-
phere?
14. What is the range 36,089 < h < 65,000 ft
of the isothermal
stratosphere?
1/6
, Flight Mechanics - Exam 1
Study online at https://quizlet.com/_h6woq4
15. Pressure altitude altitude in standard atmosphere corresponding to a given pressure.
16. Temperature alti- altitude corresponding to a given temperature
tude
17. Density altitude altitude corresponding to a given density
18. Important effects fluid viscosity, thermal conduction, and mass diffusion.
in viscous flow
19. Fluid particles mass, momentum, and energy
in motion carry
what?
20. Transport mech- momentum -> viscosity, energy (important in large velocity gradients) -> thermal
anisms are what? conductivity (important in large temperature gradients), mass -> mass diffusion
(important in strong concentration gradients)
21. What causes velocity gradients
shear stress?
22. what is an air- viscosity
foil mainly effect-
ed by?
23. boundary layer a thin layer of fluid near the surface of a body where velocity changes from 0 to
freestream velocity Vinfinity. Due to no-slip boundary condition velocity at surface
is 0. inside the boundary layer velocity gradients cause shear stress.
24. What are the two laminar (smooth regular streamlines, thin BL, less skin friction drag) and turbulent
types of bound- (chaotic irregular flow, thick BL, high skin friction drag)
ary layers?
2/6
Study online at https://quizlet.com/_h6woq4
1. Lift Upward aerodynamic force
2. Drag Backward aerodynamic force
3. Thrust Propulsive force
4. Weight downward body force
5. Pressure force per unit area due to gas molecules
6. Density mass per unit volume
7. Temperature average kinetic energy of molecules
8. Velocity A vector with magnitude and direction
9. Streamline a curve tangent to the flow velocity vector. mass flow is conserved between stream-
lines.
10. Continuity equa- mass flow rate is the same at any cross section in the stream tube due to conser-
tion vation of mass
11. Euler's equation velocity does not change with time.
in steady flow
12. Purpose of stan- to compare aircraft performance at consistent, reference atmospheric conditions.
dard atmosphere
13. What is the range h <- 36,089 ft
of the tropos-
phere?
14. What is the range 36,089 < h < 65,000 ft
of the isothermal
stratosphere?
1/6
, Flight Mechanics - Exam 1
Study online at https://quizlet.com/_h6woq4
15. Pressure altitude altitude in standard atmosphere corresponding to a given pressure.
16. Temperature alti- altitude corresponding to a given temperature
tude
17. Density altitude altitude corresponding to a given density
18. Important effects fluid viscosity, thermal conduction, and mass diffusion.
in viscous flow
19. Fluid particles mass, momentum, and energy
in motion carry
what?
20. Transport mech- momentum -> viscosity, energy (important in large velocity gradients) -> thermal
anisms are what? conductivity (important in large temperature gradients), mass -> mass diffusion
(important in strong concentration gradients)
21. What causes velocity gradients
shear stress?
22. what is an air- viscosity
foil mainly effect-
ed by?
23. boundary layer a thin layer of fluid near the surface of a body where velocity changes from 0 to
freestream velocity Vinfinity. Due to no-slip boundary condition velocity at surface
is 0. inside the boundary layer velocity gradients cause shear stress.
24. What are the two laminar (smooth regular streamlines, thin BL, less skin friction drag) and turbulent
types of bound- (chaotic irregular flow, thick BL, high skin friction drag)
ary layers?
2/6
