Abstract

Some Thermal Problems and Problems of Efficiency Bound up with the Capacity Control in Rotały Machines through a Fluid Coupling with Controlled Slip 

The principle of co-operation between a fluid coupling with controlled slip and a rotary fluid-flow machine being the power receiver was explained. It was proved that the quantity of heat emitted in the coupling depends on the characteristic of the power receiver torque M=f (n₂), where: M - torque and n₂ - rotational speed of the driven machine. For three cases: M∼n₂³, M∼ - n_2² and M∼ n₂ the relations (7), (10) and (13) were obtained; they concern the dependence of the power N_c  converted into heat in the coupling on the nominal slip so and instantaneous slip s in the coupling (Fig. 6).