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1. Combating Heat in Automobiles
Using Computational Fluid
Dynamics
Website: http://www.hitechcfd.com/
Email: info@hitechcfd.com
Author : Mehul Patel

2. Automobiles are largely composed of components that directly
or indirectly possess relationship with heat transfer. Although
heat is essentially required to churn out power from the
engine, rest of the components are being incorporated to
accommodate or transfer the generated heat, once it
completes the job of producing necessary power.

3. Combating Heat in Automobiles Using Computational Fluid Dynamics

4. To combat this heat from different regions in an
automobile, CFD proves to be an extremely useful tool. As
it is famously said, “A picture is worth a thousand words”,
CFD allows engineers to visualize the effects more
comprehensively and understand the fluid flow behavior
more accurately.

5. Here’s How CFD Can be Helpful in
Combating Heat in Vehicles:

6. Engine Cooling:
Engine cooling mainly relies on the cooling capacity of the
radiator; which is essentially a heat exchanger involving the
interaction of air and coolant flow. The larger the surface area
available for the air, the greater the heat transfer rates will be.

7. Engine Cooling

8. Engine Cooling:
Using CFD, conjugate heat transfer analysis can successfully
provide detailed insights on how the air flow is interacting with
the radiator fins and measures the effectiveness of the HE.
Regions restricting the fluid flow or allowing concentration of
heat can be figured out through simulation and further
optimization can be performed.

9. Turbochargers
The exhaust gases driving the turbine also impacts the blade
performance, as high temperature gases can eventually
develop thermal stresses and produce cracks or deformation.
The blade profiles are of prime interest in the turbo design,
which can be successfully evaluated using CFD.

10. Turbochargers

11. Turbochargers:
Pressure drop analysis will provide details about the flow
patterns inside the turbocharger and will help in identifying
regions that lead to a drop in pressure. Apart from pressure
drop, conjugate heat transfer will supply information on how
the blades and casing are interacting with high temperature
gases. It will identify hot regions in the geometry, which can be
modified to improve the performance.

12. Braking System:
Brakes are bound to generate heat as they rely on the principle
of friction. However, excessive heat generation will eventually
lead to the failure of braking system components, and may put
the vehicle safety at stake. The design of the brake rotors must
accommodate easy flow of air, in order to promote convective
heat transfer.

13. Braking System:

14. Braking System:
In practicality, it is quite complex and costly to measure the
heat transfer rate from the braking systems. On the other hand,
CFD simulations are cost-effective and provide better insights
on what’s happening in and around the braking system of the
vehicle.

15. Exhaust System:
The use of CFD can also be extended to study the exhaust
system effectively. The piping system utilized to evacuate the
exhaust gases are bound to develop thermal stresses, if their
placements are not well-designed.

16. Exhaust System

17. Exhaust System:
Studying the flow patterns of the exhaust gases coming out of
the engine exhaust port and exiting from the tail pipe, can help
in identifying the regions requiring design modifications.

18. Company Address
Hi-Tech House,
B/H V-Murti Complex, Gurukul,
Ahmedabad-380 052,
Gujarat, India.
The Original Article Published at:
http://www.engineeringexchange.com/profiles/blogs/combating-heat-in-automobiles-using-computational-fluid-dynamics