SEPARATE analytical studies of the development of velocity and thermal wakes in MHD generators are conducted and their influence on the performance of the generator is evaluated. l Such wakes could be the result of inlet vanes in a linear generator to reduce end losses or inlet swirl vanes in a disk generator to improve efficiency. Nomenclature £ = length of flat plate u - fluid velocity in x-direction €0 = virtual kinematic viscosity r) = similarity coordinate for wake