Project 050 Over-Wing Engine Placement Evaluation

Details

• Alternative Title:
  Over-Wing Engine Placement Evaluation
• Creators:
  Mavris, Dimitri N. ; Lee, Chung ; Gladin, Jonathan ; Patel, Srujal ; Tarazi, Salah ; Decker, Kenneth ; Zhu, Stephanie ; Eggert, Christopher ; Burrell, Andrew ; Perron, Christian ; Ahuja, Jai ; Harrison, Evan ; Chen, Mengzhen ; Crawford, Sam ; Koerschner, Marc ; Mufti, Bilal ; Van der Linden, James ; Vegesna, Anish ; Gandhi, Savri ; D’Cruz, Richard ; Moore, Samuel ; Krishnan, Kavya Navaneetha
• Corporate Creators:
  Georgia Tech Research Corporation ; Georgia Institute of Technology. Aerospace Systems Design Laboratory
• Corporate Contributors:
  United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment
• Subject/TRT Terms:
  Aircraft Wings Air Engines ASCENT Jet Propelled Aircraft Propulsion Turbofan Engines
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment
• Abstract:
  The over-wing nacelle (OWN) aircraft concept has promising environmental benefits due to the engine noise shielding by the wings. However, if not optimized, this engine placement may cause penalties in fuel burn due to adverse aerodynamic interactions between the wing and propulsor. In this work, the team aims to develop a multi-disciplinary optimization method for OWN aircraft. The goal is to provide FAA stakeholders with evidence to gauge the intrinsic aero-propulsive (dis)advantages of OWN vs. underwing nacelle (UWN) designs. We initially and deliberately assumed the same engine and aircraft size while optimizing both configurations. We found a 4% higher fuel flow at cruise for the OWN. We also linked the aero-propulsion analyses to mission flight path optimization. This optimized OWN configuration has approximately 7% higher fuel burn than a similarly optimized UWN over a reference mission. We also conducted a physics study of low speed/high lift configurations of OWN and UWN. We found that the OWN placement provided significant improvements in aerodynamic characteristics, but only a relatively modest improvement in takeoff field length. We then repeated the aerodynamic optimization for an aft mounted OWN configuration. The resulting design had a 5% higher fuel burn at cruise compared to the UWN. We then designed a new engine cycle to reflect recent technology levels, and the larger bypass engine was used in both OWN and UWN optimizations. We found that the OWN still had substantially higher fuel burn than the UWN.
• Format:
  PDF
• Funding:
  13-C-AJFE-GIT-057
• Collection(s):
  Federal Aviation Administration
• Main Document Checksum:
  urn:sha-512:d1cf3a6cc512c4852aaf0780d92a3afa719f1436a8d13e5fd0c10efec6cc037771b80bd2628cb04214a85072693f6d95e0157b1c9d74cdd3eeb5a881b540f02c
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/89825/dot_89825_DS1.pdf
• File Type:
  [PDF - 1.81 MB ]