Analysis of Transverse Edge Effect of Linear Induction Pump with Electrically Conducting Side Walls

抄録

An analytical study is made of transverse edge effect on the flow characteristics and performance of a linear induction pump by taking into account both effects of a nonuniform velocity distribution across the duct width and an electrical conductivity of the side-walls installed in a fringing magnetic flux region.
Equation of fluid motion and Maxwell's equations with a thin-plate approximation are simultaneously solved using a method of successive approximation, and the effects of the side-wall's conductivity on the distributions of magnetic field and flow velocity are deter-mined. Pump performances such as mechanical and electrical powers, conversion efficiency and head-flow curves are also obtained.
It is clearly shown that the secondary current in the fluid and hence the pump per-formance are significantly influenced by the side-wall's conductivity. It is also shown that the nonuniformity of the velocity distribution causes a reduction in the equivalent conduc-tivity of the secondary which is significant in the case of low side-wall's conductivity.