Method and apparatus for making a recuperator cell

摘要

Circular recuperators are used to increase the efficiency of gas turbine engines. The present circular recuperators are made of a plurality of cells. Each of the plurality of cells includes a plurality of components, such as, a plurality of sheets, a plurality of bars and guide strips. To more efficiently utilize the configuration of a primary surface circular heat exchanger or recuperator, the plurality of cells are manufactured to have a involute configuration. A fixture is used to position, hold and form the involute configuration. The fixture includes clamping device which positions and holds a base edge and the plurality of bars in a preestablished position and a forming member forms the remainder of the individual cells into the involute configuration. Corresponding ones of the base edges of individual cells form an inner diameter of the recuperator.