Preview Questions Aerodynamics Engineer | Role Specific Skill

Question 1: What is the importance of using Reynolds number similarity in wind tunnel testing?

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Ensures the same Mach number as real-world conditions

Ensures similarity in flow characteristics

Ensures the same dynamic pressure as the actual vehicle

Ensures correct temperature effects

Question 2: How does the coefficient of drag (Cd) directly influence the top speed of a vehicle at constant power output?

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Lower Cd has no effect on top speed

Higher Cd reduces power consumption at high speed

Higher Cd increases the drag force, reducing top speed

Lower Cd increases the vehicle's top speed

Question 3: How is the pressure-velocity coupling handled in CFD using the SIMPLE algorithm?

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By introducing artificial compressibility

By applying direct numerical simulation

By solving a single equation for both variables

By iteratively correcting velocity and pressure fields

Question 4: Why is the coefficient of drag (Cd) a more useful metric than drag force for comparing vehicle performance?

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Cd is unrelated to vehicle design

Cd increases with speed

Cd accounts for rolling resistance

Cd is dimensionless and independent of speed

Question 5: In a transient CFD simulation, what does a large time step size typically result in?

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Reduced mesh dependency

Faster convergence

Increased accuracy

Loss of stability

Question 6: Which testing method is used to evaluate the effect of crosswinds on vehicle stability?

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Unsteady aerodynamic testing

Isothermal flow testing

Steady-state testing

Computational thermal analysis