Feasible Concept of an Air-Driven Fan with a Tip Turbine for a High-Bypass Propulsion System

Guoping Huang, Xin Xiang, Chen Xia, Weiyu Lu and Lei Li
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Guoping Huang: College of Energy and Power, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Jiangsu, China
Xin Xiang: College of Energy and Power, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Jiangsu, China
Chen Xia: College of Energy and Power, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Jiangsu, China
Weiyu Lu: College of Energy and Power, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Jiangsu, China
Lei Li: College of Energy and Power, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Jiangsu, China

Energies, 2018, vol. 11, issue 12, 1-16

Abstract: The reduction in specific fuel consumption (SFC) is crucial for small/mid-size cost-controllable aircraft, which is very conducive to reducing cost and carbon dioxide emissions. To decrease the SFC, increasing the bypass ratio (BPR) is an important way. Conventional high-BPR engines have several limitations, especially the conflicting spool-speed requirements of a fan and a low-pressure turbine. This research proposes an air-driven fan with a tip turbine (ADFTT) as a potential device for a high-bypass propulsion system. Moreover, a possible application of this ADFTT is introduced. Thermodynamic analysis results show that an ADFTT can improve thrust from a prototype turbofan. As a demonstration, we selected a typical small-thrust turbofan as the prototype and applied the ADFTT concept to improve this model. Three-dimensional flow fields were numerically simulated through a Reynolds averaged Navier-Stokes (RANS)-based computational fluid dynamics (CFD) method. The performance of this ADFTT has the possibility of amplifying the BPR more than four times and increasing the thrust by approximately 84% in comparison with the prototype turbofan.

Keywords: high-bypass ratio engines; tip turbine; air-driven fan; aerodynamic analysis (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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