- #1
jesdreamer
- 8
- 0
Fluid or sleeve bearings use an off center shaft location to generate a hydrodynamic wedge in direction of rotation. This converging fluid causes higher pressure and can support a load applied normal to shaft axis during rotation. This action appears to be similar to the hydrodynamic support of a water skier, high speed boats, airplanes, etc.
But this seems to me a violation of the Bernoulli Principal which clearly demonstrates a reduction in pressure with converging flow (where the flow velocity is caused to speed up). I am under the impression that fluid inertia causes hydrodynamic bearing or water skier support and even airplane wing support, but we certainly have fluid inertia in Bernouli flow -- and it seems that both are converging flow situations.
Could it be that in the bearing, skier, and wing we don't really have converging flow but instead flow "redirection" which due to fluid mass & inertia, the action yields pressure or force normal to the flow??
My question is if "redirection" is present and not converging flow, can someone provide a simple explanation?? -- to me it sure sounds like converging flow --
But this seems to me a violation of the Bernoulli Principal which clearly demonstrates a reduction in pressure with converging flow (where the flow velocity is caused to speed up). I am under the impression that fluid inertia causes hydrodynamic bearing or water skier support and even airplane wing support, but we certainly have fluid inertia in Bernouli flow -- and it seems that both are converging flow situations.
Could it be that in the bearing, skier, and wing we don't really have converging flow but instead flow "redirection" which due to fluid mass & inertia, the action yields pressure or force normal to the flow??
My question is if "redirection" is present and not converging flow, can someone provide a simple explanation?? -- to me it sure sounds like converging flow --