Validation and assesment of lower order aerodynamics based design of Ram Air Turbines

Sudharshan Ashwin Renganathan, Russell Denney, Antoine Duquerrois, Dimitri Mavris

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations


Ram Air Turbines (RATs) are small-scale wind powered turbines installed in commercial and military aircraft to generate power for in-flight hydraulics and electronics, in the event of total power failure. There is a need for efficient design of RATs that maximizes the power by minimizing weight and cost. The Lifting Line (LL) theory is applied towards the aerodynamic analysis of a 2- bladed RAT and the approach is validated against experimental data. The goal of this paper is to demonstrate the feasibility of the LL theory as an efficient tool for conceptual design of RATs. First, the methodology is validated by reproducing an existing RAT blade design for a known operating condition. Next, off-design conditions are explored for a design point. The validation study demonstrated that the LL theory can predict aerodynamic performance of RATs within 20% up to the transonic regime. Given the simple computational implementation, cheap computational cost and observed level of accuracy the LL theory appears to be an attractive approach towards the conceptual design and design space exploration of RATs. Thus, the paper also investigates the aerodynamic design capabilities of the LL theory, given some constraints and operating condition.

Original languageEnglish (US)
Title of host publication12th International Energy Conversion Engineering Conference, IECEC 2014
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Electronic)9781624103049
StatePublished - 2014

Publication series

Name12th International Energy Conversion Engineering Conference, IECEC 2014

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment


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