ENGINE DESIGN FOR A HALF SCALE MODEL OF JSF UAV WITH HIGH POWER EXTRACTION REQUIREMENTS
Unmanned aerial vehicles (UAV) are the future of air combat. These platforms have generic needs in contrast to manned air platforms. These needs should also be addressed from the engine design perspective. In this study conceptual design for a half-scale UAV (based on the dimensions of the Joint Strike Fighter) is presented. For this purpose a twin spool low by-pass ratio turbofan engine is designed. The main requirement is the high power extraction capability from the engine. This issue is addressed utilizing a novel alternator concept that relies on integrating the stator and the rotor on counter rotating spools. Furthermore on and off design point analyses and component design summaries are also presented. Outcome of the conceptual design task pushes the boundaries of the current state-of-the-art.