Title:
Sensitivity Analysis of Aero-Propulsive Coupling for Over-Wing-Nacelle Concepts
Sensitivity Analysis of Aero-Propulsive Coupling for Over-Wing-Nacelle Concepts
Author(s)
Berguin, Steven H.
Renganathan, Sudharshan Ashwin
Ahuja, Jai
Chen, Mengzhen
Tai, Jimmy C. M.
Mavris, Dimitri N.
Renganathan, Sudharshan Ashwin
Ahuja, Jai
Chen, Mengzhen
Tai, Jimmy C. M.
Mavris, Dimitri N.
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Abstract
A sensitivity analysis is performed to quantify the relative impact of perturbing a set of design variables representing an airplane configuration with Over-Wing Nacelles (OWN), operating at transonic cruise. The goal is to study the impact of perturbing the engine's XYZ position and power setting on installation drag, engine inlet pressure recovery, and lift curve characteristics. High- fidelity Reynolds Averaged Navier-Stokes (RANS) simulations of the Common Research Model (CRM) modified with powered, over-wing nacelles are performed and dominant main effects and interactions are identified. The most dominant effect was by far the engine's X position, but it was also found that podded OWN configurations exhibit statistically significant, aero-propulsive coupling. Specifically, certain engine locations cause changes in the flow-field that deteriorate inlet pressure recovery and, vice
versa, a change in engine boundary conditions can affect installation drag. It is therefore recommended to simulate OWN concepts using a coupled MDA or MDAO approach to capture interdependencies between aerodynamics and propulsion.
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Date Issued
2018
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Text
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Paper