Comprehensive Report of Fan Performance from Duct Rake Instrumentation on 1.294 Pressure Ratio, 806 Ft/SEC Tip Speed Turbofan Simulator Models
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Home > Reference > Research and information: general > Research methods: general > Comprehensive Report of Fan Performance from Duct Rake Instrumentation on 1.294 Pressure Ratio, 806 Ft/SEC Tip Speed Turbofan Simulator Models
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Comprehensive Report of Fan Performance from Duct Rake Instrumentation on 1.294 Pressure Ratio, 806 Ft/SEC Tip Speed Turbofan Simulator Models

Comprehensive Report of Fan Performance from Duct Rake Instrumentation on 1.294 Pressure Ratio, 806 Ft/SEC Tip Speed Turbofan Simulator Models


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About the Book

A large scale model representative of an advanced ducted propulsor-type, low-noise, very high bypass ratio turbofan engine was tested for acoustics, aerodynamic performance, and off-design operability in the NASA Glenn 9- by 15-Foot Low-Speed Wind Tunnel. The test was part of NASA s Advanced Subsonic Technology Noise Reduction Program. The low tip speed fan, nacelle, and un-powered core passage were simulated. As might be expected, the effect of stall management casing treatment was a performance penalty. Reducing the recirculating flow at the fan tip reduced the penalty while still providing sufficient stall margin. Two fans were tested with the same aerodynamic design; one with graphite composite material, and the other with solid titanium. There were surprising performance differences between the two fans, though both blades showed some indication of transitional flow near the tips. Though the pressure and temperature ratios were low for this fan design, the techniques used to improve thermocouple measurement accuracy gave repeatable data with adiabatic efficiencies agreeing within 1 percent. The measured fan adiabatic efficiency at simulated takeoff conditions was 93.7 percent and matched the design intent. Jeracki, Robert J. Glenn Research Center WBS 22-781-30-50


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Product Details
  • ISBN-13: 9781721151080
  • Publisher: Createspace Independent Publishing Platform
  • Publisher Imprint: Createspace Independent Publishing Platform
  • Height: 279 mm
  • No of Pages: 150
  • Spine Width: 8 mm
  • Width: 216 mm
  • ISBN-10: 1721151087
  • Publisher Date: 15 Jun 2018
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 363 gr


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Comprehensive Report of Fan Performance from Duct Rake Instrumentation on 1.294 Pressure Ratio, 806 Ft/SEC Tip Speed Turbofan Simulator Models
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Comprehensive Report of Fan Performance from Duct Rake Instrumentation on 1.294 Pressure Ratio, 806 Ft/SEC Tip Speed Turbofan Simulator Models
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