Rotary Expander Engine Development Program
NAVAL UNDERWATER SYSTEMS CENTER NEWPORT RI
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This paper describes some results and the status of a program to develop a 250 hp186 kW rotary expander engine for use with an external combustion source or in a closed cycle power system. In the first phase of the program, parts from a Curtiss-Wright RC1-60 internal combustion engine were combined with a new housing, end plates and a set of rotary valves to produce the first rotary expander, the RE1-60. The RE1-60 was tested at a maximum power output of 155 hp116 kW at 4800 rpm when supplied with combustion gas at 1000 F538 C and 600 psia4.14 MPa. Details of the RE1-60 and test results are presented. The second rotary expander, the RE1-11, was designed with the expanders kinematics similar to that of Wankels earlier engines the main shafteccentric is stationary while the rotor and housing rotate. Power take-off occurs from the housing. Compared to the RE1-60 this kinematic change eliminates two balance weights and a fly wheel, and permits location of the valves closer to the expanders working chamber. Details of the RE1-11 design are given in the paper along with solutions to some challenging casting and fabrication problems. The current status of the RE1-11 fabrication program and plans for half-power testing are summarized.
- Non-electrical Energy Conversion