COMPUTER MODELING OF OPERATION OF THE CONDUCTIVE MHD CENTRIFUGAL PUMP

The mathematical model of an MHD centrifugal conductive pump (CCP) is developed, which allows the flow of molten metal in the MHD channel and the output pressure to be calculated as a function of the basic determining major parameters: flow rate, current strength, and magnetic induction. The development and testing of the mathematical model were based on the experimental results obtained for the CCP working model. Determination of friction forces effect in scope of initial system of the MGD-equations is carried out on the basis of the known square-law of the drag for turbulent flow in a pipe, generalized on a case of two-dimensional flows in the channel. On base of the matching of computational and experimental values of pressure at exit of conductive centrifugal pump for different operating modes, dependences of coefficient of drag depending on the determining major parameters were got. The calculations showed that the dependences obtained have universal enough character. The implementation of this model in a computer code can be used to design pumps of this type and to control their operation in the metallurgical process technology.