Automotive Aerodynamics and Aesthetics — Winter 2024

What is the importance of aerodynamics in a vehicle?

Write the typical drag coefficient for the given class of vehicles:

Saloon car (ii) Buses and coaches (iii) Light van

List out the aerodynamics forces and explain each in brief.

Describe an importance of aesthetics in automotive.

Draw a diagram and show the relative air speed and pressure conditions over the upper profile of a moving car.

Explain (i) concept sketching (ii) Full sized tape drawing (iii) Clay modeling.

Give the types of wind tunnel and explain the wind tunnel testing with neat sketch.

Explain mechanics of air flow and pressure around vehicle.

Define vehicle lift and compare negative lift with positive lift.

Explain the effects of under floor to ground clearance on the surrounding air speed, pressure and aerodynamic lift with neat sketch.

Write short note on cab roof deflectors.

Discuss the effect of rear panel slope angle on the afterbody drag.

Draw the different car body style configurations and explain each in short.

Enlist On- road testing and measurement methods.

Explain: (i) after flow wake (ii) Vortices.

Explain any one method used for shape optimization of car.

Explain the working of odometer.

Explain Tractor and trailer skirting.

Write short note on cab to trailer body gap seals with neat sketch.

Define under body roughness.

Explain boundary layer velocity profile.

Write the principles of commercial vehicle aerodynamics.

Explain aero foil lift and drag.

Draw a graph to show the flow body pressure distribution with and without cab roof deflector for a cab with trailer.

Write a short note on Flow visualization scale model testing with neat sketch.