Design of Shrouded-Plug Nozzles for Maximum Thrust

A method for designing the wall contours of shrouded-plug nozzles for maximum thrust is presented. The flow is assumed to be isentropic. The optimization problem is formulated employing the calculus of variations, and the design equations are determined. A numerical technique for implementing the method is presented. A comparison is presented between truncated perfect shrouded-plug nozzles and maximum thrust shrouded-plug nozzles. Some numerical results are presented to demonstrate the application of the method.