The air-to-air Ejector Plume Cooling System is used to achieve a reduction in the exhaust gas plume temperature for a vertical uptake. A typical device will cool the plume to below 250 degrees C, however lower plume temperatures can be achieved by increasing the size of the device.

The Ejector Plume Cooling System is comprised of the following main components:

• A multi-lobed nozzle;

• A mixing tube; and optionally

• A plume dispersion system.

The mixing tube is located downstream of the nozzle and provides a flow channel within which the ejected cool air is mixed with the hot exhaust gas. A plume dispersion system can optionally be specified to separate the plume into multiple cores, accelerating its dispersion once the gas exits into the free stream.

The Ejector Plume Cooling System provides the same plume cooling performance as the Davis Eductor/Diffuser IRSS device. In some applications, clients who have been primarily interested in plume cooling have selected the Eductor/Diffuser in order to also achieve low IR signature with only a small increase in weight and price.

The main benefits of the Davis Ejector Plume Cooling Systems are:

• Scalable to fit any sized uptake;

• Shape can be customized to direct the plume away from ship structure and mast;

• Passive operation requires no maintenance; and

• Simple design for easy integration.