Ejectors are designed to convert the pressure energy of a motivating fluid to velocity energy to entrain suction fluid. Ejectors are categorized into four basic types such as single-stage, multi-stage non-condensing, multi-stage condensing and multi-stage with both condensing & non-condensing stages. It is composed of three basic parts such as nozzle, mixing chamber and diffuser.
Elastic-plastic fracture mechanics is a method for predicting failure of a structure containing a crack. J-integral and crack-tip opening displacement are the most viable fracture parameters for characterizing crack initiation, stable crack growth, and subsequent instability in elastic-plastic materials. It applies to materials that exhibit time-independent, nonlinear behavior (i.e. plastic deformation).
An elastomer bellows seals is a non-pusher seal design in which a single spring coil fits over the shaft and bellows. The elastomer bellows requires a concentric spring; the metal bellows does not because the bellows itself provides the pressure necessary to hold the seal faces in contact.