Preview Questions Aerodynamics Engineer | Role Specific Skill

Question 1: What is the primary drawback of direct numerical simulation (DNS) in CFD?

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Limited accuracy

Poor convergence properties

Extremely high computational cost

Inability to simulate turbulence

Question 2: Which of the following turbulence models is most commonly used for automotive CFD simulations at high Reynolds numbers?

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SST k-? model

k-? model

Spalart-Allmaras model

Large Eddy Simulation (LES)

Question 3: Why is Mach number similarity less critical for subsonic automotive wind tunnel tests?

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Flow separation depends only on Reynolds number

Ground effect dominates at low speeds

Drag force is unaffected

Compressibility effects are negligible

Question 4: When comparing the aerodynamic drag of two vehicle designs in a wind tunnel, what factor should be most carefully considered to ensure reliable comparison?

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The scale ratio between the models

The alignment of the test model with the wind flow

The type of paint used on the vehicle model

Ambient temperature of the testing facility

Question 5: What is the primary role of active aerodynamics in vehicle performance optimization?

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To change the vehicle's geometry for better handling

To improve stability by dynamically adjusting airflow

To increase drag for better vehicle control

To reduce drag in low-speed driving conditions

Question 6: In CFD for automotive aerodynamics, which of the following methods is best suited for simulating flow around complex geometries?

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Finite Element Method (FEM)

Boundary Element Method (BEM)

Finite Volume Method (FVM)

Lattice Boltzmann Method (LBM)