Heat Generated on a Spinning Disk Thrust Stop

Good luck.

How fast will you stop it? How much spinning mass are we stopping?

How much heat can we dissipate into whatever it is that is holding this disk?

What are you doing? 64,000 rpm is a lot.

Flywheel?

http://en.wikipedia.org/wiki/Regenerative_brake

It is attached to a steel shaft, but i wanted to know how much heat i should get on the surface of the disk when I hit the test material.

It strikes me as homeworks, in which first task is sorting out relevant from irrelevant.

In real life, I would hate having to dissipate so much energy in a friction pad. The generated dust is deadly for any enclosed mechanism.

And why to do it in the first place? The connected generator's dynamic braking ought to be always available to bring the rpm down safe. Beyond that, I do not care, what you do.

So no, it is not a hw question. It is a hydrostatic disc testing different metals coated with different coatings. Been in the industry for 6 years now. I thought of using a brake or flywheel but didn't really play out well.

The disc in small diameters does not stop usually at all and no i do not know what the rpm it goes down to when it hits the test material.

I have read all notes. Wherever this guy is sitting, it is still a HW -that is homework question. Telltale: he does not care to deal with real life consequences of any kind. That is not engineering, IMHO.

leveles, it is not homework. What would like to know, with-in reason. Have you ever tested the load capacity on a hydrodynamic airfoil bearing? A piston containing a airfoil thrust bearing comes up with a certain amount of load, to a spinning disc. Then the piston increases the load on the spinning disc. There is a arm attached to the piston which is then attached to a load cell. I am finding out speed vs torque with consideration of the force applied. Instead of figuring out just bearing losses, I wanted to know just the heat I would be seeing on the surface of the disk when load is applied. Why? because when I am performing FEA on the model. I found the stress of the spinning disc and can see the displacement whether or not it is bowing up or cupping down because of the centrifugal forces and the load applied on this disc. It is nice to consider the whole system, but I prefer to look at it piece by piece first when performing this FEA. This is not run by a motor. It is a turbine driven hydrostatic rig.