Design and Fabrication of Forward-Swept Counterrotation Blade Configuration for Wind Tunnel Testing

Download or read book Design and Fabrication of Forward-Swept Counterrotation Blade Configuration for Wind Tunnel Testing written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-17 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Work performed by GE Aircraft on advanced counterrotation blade configuration concepts for high speed turboprop system is described. Primary emphasis was placed on theoretically and experimentally evaluating the aerodynamic, aeromechanical, and acoustic performance of GE-defined counterrotating blade concepts. Several blade design concepts were considered. Feasibility studies were conducted to evaluate a forward-swept versus an aft-swept blade application and how the given blade design would affect interaction between rotors. Two blade designs were initially selected. Both designs involved in-depth aerodynamic, aeromechanical, mechanical, and acoustic analyses followed by the fabrication of forward-swept, forward rotor blade sets to be wind tunnel tested with an aft-swept, aft rotor blade set. A third blade set was later produced from a NASA design that was based on wind tunnel test results from the first two blade sets. This blade set had a stiffer outer ply material added to the original blade design, in order to reach the design point operating line. Detailed analyses, feasibility studies, and fabrication procedures for all blade sets are presented. Nichols, G. H. Unspecified Center COUNTER ROTATION; FABRICATION; SWEPTBACK WINGS; TURBINE BLADES; WIND TUNNEL TESTS; ACOUSTIC MEASUREMENT; ACOUSTIC PROPERTIES; AEROACOUSTICS; AERODYNAMIC CHARACTERISTICS; FEASIBILITY ANALYSIS...