Gas turbine engine internal air systems

It has been estimated that as many as three million people may be airborne at any given moment (Spittle (2003)). Gas turbine engine technology, which is responsible as the prime mover for the vast proportion of this figure, is therefore of critical importance. The quest for fuel efficient engines, low emissions, low noise levels has put ever increasing demands on engine design. The challenge has been intensified with growing commercial pressure to meet these objectives in the shortest time possible whilst still complying with ever tougher emission regulations.