Application of Fluidics to Ramjet Control Systems

Application studies of fluidic technology have demonstrated its adaptability and versatility in several ramjet control systems. Schemes for mechanizing three typical controls with fluidic elements to the extent now feasible are presented. Fluidics are incorporated in sensing, logic, and actuation functions. Digital and analog techniques areemployed. The three controls are: the inlet control which optimizes performance through modulation of the center-body position, the fuel control which maintains the desired fuel-air ratio, and the coolant control which manages the fuel distribution in the engine structure to maintain structural integrity. Performance analyses and test results are included.