Exam (elaborations)
AE 311 Final Exam Prep Questions And Answers Latest Update
- Course
- AE 311
- Institution
- Iowa State University
AE 311 Final Exam Prep Questions And Answers Latest Update
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Solution 2024/2025Pepper
AE 311 Final Exam Prep Questions And
Answers Latest Update
Examples of Aerospace technologies critically dependent on fluid flow:
(Answers may vary) ANS✔✔ Wings, helicopter blades, turbine engines, wind
turbine blades, cooling loops for electronics, AC systems, Fuel delivery,
atmosphere/weather, etc.
Examples of Non-Aerospace technologies critically dependent on fluid flow:
(Answers may vary) ANS✔✔ blood flow, brain fluid flow, oceans/currents,
ships/submarines, cars/trains, forrest fires, pollutant dispersal, etc.
Continuum approximation ANS✔✔ Assume fluid is continuous-there are no
breaks, it fully fills space, and it is infinitely divisible.
Lagrangian method ANS✔✔ Following a specific molecule or section of fluid
as it flows through space. One can imagine tracking a specific piece of
driftwood as it continues down a river.
Eulerian Method ANS✔✔ Studying the flow by staying in one place and
measuring changes to the velocity as it flows past.
What are some important parameters we care about when evaluating a
fluid? (Note, not a wing, just the fluid) ANS✔✔ Velocity of the Fluid,
Pressure, Density, Temperature, Viscosity
, Solution 2024/2025
Pepper
What are some forces we care about when evaluating a fluid? ANS✔✔
Pressure (normal to surface), Shear (viscous flows, tangent to surface),
Gravity (body force). Integrating the effects of pressure and shear, we arrive
at the global forces that we care about, Lift and Drag.
Reynolds Number Equation ANS✔✔ p*l*v / mu
p = Density
l = Length
v = Velocity
mu= viscosity
Metric Units for Force, Density, Viscosity, Velocity, Pressure ANS✔✔ Force =
N = kg* m/(s^2)
Density = kg / (m^3)
Viscosity = kg / (m*s)
Velocity = m/s
Pressure = Pa = N / (m^2)
Basic Equation of Hydrostatics ANS✔✔ dP = -pg*dy
P = Pressure
p = Density
g = gravity
y = height
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