Comparative Study of Ram Air Turbines based on Wind Tunnel Study for Specific Air Borne Energy Extraction

Ram Air Turbines (RAT) are used for emergency on-board power generation on aircraft and associated systems. Many studies on usage of RATs have shown promising results in terms of using RATs as a source of emergency on-board power generation. Many external podded systems on aircraft utilise RATs for self-sufficient adaptation. These pods generate their own power using RATs for their power requirements instead of depending on the mother aircraft power. Commercial cargo planes use RATs for generating emergency hydraulic power. A RAT was suggested to be used for emergency power, during failure of main alternator on a prototype aircraft. A specific requirement of the RAT was also to produce high drag for aerodynamic braking when deployed and concurrently generate electrical energy. Three models with different solidity were studied in wind tunnel at different wind speeds for suitability of this drag-energy combination. This paper presents the results of the study. Based on the results, a suitable RAT was selected for further analysis and ground trials.

[1]  Kiyoul Kim,et al.  Heat and weight optimization methodology of thermal batteries by using deep learning method with multi-physics simulation , 2021 .

[2]  Shyni Thomas,et al.  Utilisation of Ram Air Turbine on a Fighter Platform for Energy Extraction Failure Mode Study , 2020 .

[3]  M. Alsharif,et al.  Design of Rotor Blades for Vertical Axis Wind Turbine with Wind Flow Modifier for Low Wind Profile Areas , 2020, Sustainability.

[4]  Siddarth S. Singh,et al.  Innovative Method for the Estimation of Closure Velocity between RAT Driven Drogue and IFR Probe Air to Air refueling Flight Trials , 2020 .

[5]  V. Hariram,et al.  Experimental data on analysis of a horizontal axis small wind turbine with blade tip power system using permanent magnetic generator , 2019, Data in brief.

[6]  Sen Zhang,et al.  Effects of Solidity on Aerodynamic Performance of H-Type Vertical Axis Wind Turbine , 2018, IOP Conference Series: Earth and Environmental Science.

[7]  Zongxia Jiao,et al.  A novel integrated self-powered brake system for more electric aircraft , 2017 .

[8]  Y. Li,et al.  Effect of blade number on performance of drag type vertical axis wind turbine , 2016 .

[9]  Yang Cao,et al.  Research on the aerodynamic characteristics of a lift drag hybrid vertical axis wind turbine , 2016 .

[10]  John Justak,et al.  Innovative Ram Air Turbine for Airborne Power Generation , 2015 .

[11]  Wenlin Liu,et al.  Numerical simulation of RCS for carrier electronic warfare airplanes , 2015 .

[12]  David Wood,et al.  Forces and Moments on Flat Plates of Small Aspect Ratio with Application to PV Wind Loads and Small Wind Turbine Blades , 2015 .

[13]  B. Sindhuja,et al.  A proposal for implementation of wind energy harvesting system in trains , 2014, Proceedings of The 2014 International Conference on Control, Instrumentation, Energy and Communication (CIEC).

[14]  Xi Ying,et al.  Aerodynamic braking device for high-speed trains: Design, simulation and experiment , 2014 .

[15]  Kaushik Rajashekara,et al.  Examination of Aircraft Electric Wheel Drive Taxiing Concept , 2008 .

[16]  David A. Spera,et al.  Models of Lift and Drag Coefficients of Stalled and Unstalled Airfoils in Wind Turbines and Wind Tunnels , 2008 .

[17]  S.E. Ben Elghali,et al.  A Simulation Model for the Evaluation of the Electrical Power Potential Harnessed by a Marine Current Turbine , 2007, IEEE Journal of Oceanic Engineering.

[18]  Sanetoshi Saito,et al.  Characteristics of the Aerodynamic Brake of the Vehicle on the Yamanashi Maglev Test Line , 2000 .

[19]  K. Palanikumar,et al.  Implementation of Effective Fuel Saving Methodology for Turbines using Air Drag in Vehicles , 2019, Materials Today: Proceedings.

[20]  Ali H. Almukhtar,et al.  Effect of Drag on the Performance for an Efficient Wind Turbine Blade Design , 2012 .

[21]  Mike Tooley,et al.  Aircraft electrical and electronic systems : principles, maintenance and operation , 2009 .