TY - GEN
T1 - High efficiency integrated propeller-coflow jet airfoil in cruise
AU - Ren, Yan
AU - Zha, Gecheng
N1 - Publisher Copyright:
© 2020, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2020
Y1 - 2020
N2 - This paper presents the study of propeller-CoFlow Jet (CFJ) active flow control airfoil in cruise flight. The propeller-CFJ system is an integrated system with propellers mounted above the CFJ wing suction surface. Differing from the conventional configurations that separate the propeller and the airfoil, the propeller-CFJ system is designed together to enhance cruise efficiency via interaction between the CFJ and the propeller. The propeller pulls more flow toward the airfoil suction surface and the CFJ take advantage of the flow to achieve better aerodynamic performance. The simulations employ 3D RANS solver with Spalart-Allmaras (S-A) turbulence model, 3rd order WENO scheme for the inviscid fluxes, and 2nd order central differencing for the viscous terms. The aerodynamic performance, energy expenditure, and flow field are compared between airfoils with and without CFJ/propeller, including different propeller strength. The 2D simulation results show that the cruise efficiency is increased by 46.86% for case with CFJ only, and by 20.62% for case with propeller only compare to the baseline airfoil with no flow control. However, for the cases with both the CFJ and the actuator, the cruise efficiency improvement can be even larger due to the interaction of the CFJ and the actuator. The parametric study on the actuator strength shows that the cruise efficiency gains are around 80% for all cases and have a tenancy of increase with the increase of the propeller strength. The 3D full aircraft simulations show that the aerodynamic efficiency increases 7.11% and the productivity efficiency increases 11.17% with the help of the propeller actuator.
AB - This paper presents the study of propeller-CoFlow Jet (CFJ) active flow control airfoil in cruise flight. The propeller-CFJ system is an integrated system with propellers mounted above the CFJ wing suction surface. Differing from the conventional configurations that separate the propeller and the airfoil, the propeller-CFJ system is designed together to enhance cruise efficiency via interaction between the CFJ and the propeller. The propeller pulls more flow toward the airfoil suction surface and the CFJ take advantage of the flow to achieve better aerodynamic performance. The simulations employ 3D RANS solver with Spalart-Allmaras (S-A) turbulence model, 3rd order WENO scheme for the inviscid fluxes, and 2nd order central differencing for the viscous terms. The aerodynamic performance, energy expenditure, and flow field are compared between airfoils with and without CFJ/propeller, including different propeller strength. The 2D simulation results show that the cruise efficiency is increased by 46.86% for case with CFJ only, and by 20.62% for case with propeller only compare to the baseline airfoil with no flow control. However, for the cases with both the CFJ and the actuator, the cruise efficiency improvement can be even larger due to the interaction of the CFJ and the actuator. The parametric study on the actuator strength shows that the cruise efficiency gains are around 80% for all cases and have a tenancy of increase with the increase of the propeller strength. The 3D full aircraft simulations show that the aerodynamic efficiency increases 7.11% and the productivity efficiency increases 11.17% with the help of the propeller actuator.
UR - http://www.scopus.com/inward/record.url?scp=85091924697&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85091924697&partnerID=8YFLogxK
U2 - 10.2514/6.2020-0787
DO - 10.2514/6.2020-0787
M3 - Conference contribution
AN - SCOPUS:85091924697
SN - 9781624105951
T3 - AIAA Scitech 2020 Forum
BT - AIAA Scitech 2020 Forum
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - AIAA Scitech Forum, 2020
Y2 - 6 January 2020 through 10 January 2020
ER -