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The Variable Area Turbine for Future Turboshaft Engines

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Future helicopter requirements clearly dictate the need for improved propulsion systems. The military services continue to extend the fields of helicopter utility and it is reasonable to anticipate that this extension of utilization will continue. Increases in aircraft speed, range and payload capabilities are of paramount importance. Therefore, there will be continual pressure for improvement of propulsion systems in terms of lower specific fuel consumption and “mission effective” decreases in propulsion system weight. Addressing to the turboshaft engine, the attainment of higher performance necessitates the incorporation of several key advanced technologies. Of prime importance is the incorporation and further development of high temperature turbine component technology for both regenerated and non‐regenerated turbine type turboshaft engines. Also, the development of variable area turbines can provide significant improvements in engine performance and cost effectiveness. It is the purpose of this paper to show the magnitude of the engine improvements which can result from the incorporation of advanced technology with particular emphasis on the variable turbine applied to a regenerated free turbine engine.

Document Type: Research Article


Affiliations: Curtiss-Wright Corporation, Wright Aeronautical Division, Wood-Ridge, N. J. 07075

Publication date: 1965-10-01

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  • The Journal of the American Helicopter Society is the world's only scientific journal dedicated to vertical flight technology. It is a peer-reviewed technical journal published quarterly by AHS International and presents innovative papers covering the state-of-the-art in all disciplines of rotorcraft design, research and development. (Please note that AHS members receive significant discounts on articles and subscriptions.)

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