Patent ID: 8794902

Claim:
A system for producing shaft work in a ram turbine associated with a moving vehicle, comprising: a turbine stage associated with a primary air duct so as to be rotatable therein such that primary air introduced as a free stream into the primary air duct drives the turbine stag; a secondary air duct having an inlet arranged upstream of the rotatable turbine stage to admit secondary air introduced as a free stream into the secondary air duct; and a lobe mixer arrangement operatively mounted at the discharge end of the turbine and thus arranged relative to the secondary air duct such that the secondary air continuously discharges around the lobe mixer to generate a turbine discharge static pressure region which is lower than a static pressure that would exist without the lobe mixer arrangement and an increased total-to-static pressure ratio across the turbine is achieved without a change in total pressure between the inlet and the discharge end during movement of the vehicle.