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Project Ke70


zeph_KE70

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Here- this will help. He wrote a Masters thesis on brake cooling.

 

http://researchbank.rmit.edu.au/eserv/rmit:6207/Stephens.pdf

Convection to the atmosphere must then be the primary means of heat dissipation from the

brake rotor. Convection is governed by the expression:

 

Q=hAs(Ts-Ta)

 

also know as Newton’s law of cooling.

 

Where:

Q = the rate of heat transfer (Watts),

h = the convection heat transfer coefficient (W/m2 k),

As = the surface area of the rotor (m2), and

Ts and Ta are the surface temperatures of the brake rotor and ambient air temperature respectively.

 

It can be seen from this expression that in order to maximise heat transfer from the rotor (increase Q) and keep the rotor temperature (Ts) to a minimum, the value of heat transfer coefficient (h), or the surface area (As) needs to be increased. As it is required to keep Ts to a minimum, improvements must be made through increasing the heat transfer coefficient (h) and or the surface area (As) of the rotor. The amount by which the surface area can increase is confined by the diameter of the wheel and the requirements of minimising unsprung mass1, so improvements in cooling can best be made through increased values of the heat transfer coefficient, (Limpert 1975).

 

I assume you are going to mount the air intake tube as close to the centre of the backing plate as possible, as you need to get the air right into the middle of the disc so it flows outwards through the vents.

post-7544-0-70723900-1330839123_thumb.jpg

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If anything you'd probably only need a few hundred mm from the brake then a normal duct. Considering it's transferring cool air to the brakes not sucking hot air.

 

Go to a wrecker and find some radiator hose that fits.

Edited by B.L.Z.BUB
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