Preview Questions Aerodynamics Engineer | Role Specific Skill

Question 1: What is the main reason for using a scaled model in wind tunnel testing for automotive aerodynamics?

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To replicate the real-world flow dynamics on a smaller scale

To reduce the costs associated with full-scale testing

To simplify the complexity of the full-scale model

To avoid issues with full-scale model assembly

Question 2: How does the "Reynolds Averaged Navier Stokes" (RANS) model differ from the "Large Eddy Simulation" (LES) in automotive CFD?

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RANS is computationally faster than LES

RANS models turbulence effects using time-averaged equations

LES models small-scale turbulence directly

LES is used only for low Reynolds number flows

Question 3: Which numerical method is commonly used in computational fluid dynamics (CFD) to solve Navier-Stokes equations?

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Boundary element method

Monte Carlo method

Finite volume method

Finite element method

Question 4: What is the effect of turbulence intensity in high-speed CFD simulations for vehicle aerodynamics?

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It decreases drag and increases vehicle stability

It reduces computational cost

It leads to higher drag and instability in wake regions

It has no effect on simulation outcomes

Question 5: What is the main limitation of using a rolling road in automotive wind tunnel testing?

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Limited ability to simulate real tire-road interactions

Complexity in maintaining steady flow

High computational demand

Difficulty in simulating crosswind conditions

Question 6: Which parameter is most critical for ensuring the accuracy of drag force measurements in a wind tunnel?

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Flow velocity uniformity

Temperature control

Material composition of the wind tunnel walls

Surface finish of the model