Power transmission hydrodynamic

Utilization of the mass forces in hydrodynamic power transmissions. 

FIG. P-74 Hydrodynamic power transmission (converter). (Source J. M. Voith GmbH.)... 

It may be helpful to express the change of viscosity of a silicone oil in a different manner. If we compare a typical silicone oil with a standard hydrocarbon oil of viscosity index 100, the two having the same viscosity at 100° F., we find that after cooling to —35° F. the silicone oil has seven times the viscosity it had, whereas the hydrocarbon oil has increased 1,800-fold in viscosity. This relative constancy of viscosity of the silicone oil makes it particularly suitable for use as a fluid in hydraulic systems for the transmission of power. Silicone oils do not react with the common metals of construction, and they are so inert that even at 300° F. they do not discolor r become acid or form sludge. They are satisfactory lubricants in hydraulic pumps and in any other device where conditions of hydrodynamic lubrication prevail. When used as lubricants, methyl silicone oils do not suffer loss of viscosity through shear breakdown under continuous load at high speed. 

For these reasons the conventional measurements of the residence time distribution should be realized very exactly. An important influence on the information content of the tracer output function has the shape of the input function. Between the transmission function of the object co) (Fomier transform of the hydrodynamic model) and the power spectrum of the tracer input function C, ( ) and the power spectrum of the tracer output concentration distribution Co X ) the following relation exists for linear models ... 

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