Compound Ejector Thrust Augmenter Development

The basic simplicity of ejectors provides an advantageous form of engine thrust augmentation for V/STOL aircraft. Application requires careful internal aerodynamics development to provide high augmentation ratios in compact, short length, ejector installations. Development of the compound ejector through rig and wind tunnel tests is described wherein Coanda flow and improved central primary flow injection are combined. Several methods of reducing ejector volume are employed through increased mixing and diffusion rates while directing attention to loss sources such as inlet blockage.Copyright © 1973 by ASME