TY - GEN
T1 - Numerical investigation of performance improvement of the co-flow jet electric airplane
AU - Yang, Yunchao
AU - Zha, Gecheng
N1 - Funding Information:
This project is sponsored by the Defense Advanced Research Projects Agency and monitored by the program manager Jean-Charles Ledé under Cooperative Agreement No.: HR0011-16-2-0052. The content of the information does not necessarily reflect the position or the policy of the Government, and no official endorsement should be inferred. The simulations are conducted on Pegasus supercomputing system at the Center for Computational Sciences at the University of Miami.
Publisher Copyright:
© 2018, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
PY - 2018
Y1 - 2018
N2 - The Co-Flow Jet (CFJ) flow control is a promising technology that can achieve high wing loading and aerodynamic efficiency at cruise and ultra-high lift coefficient at takeoff/landing. A conceptual electric airplane design utilizing CFJ flow control (CFJ-EA) was designed by Lefebvre and Zha [1]. Recently, the super lift coefficient (SLC) of CFJ airfoil that exceeds theoretical lift coefficient limit was achieved at ultra-high angle of attack (AoA) [2]. The purpose of this paper is to present an improved design of CFJ-EA (CFJ-EA2) with the performance improvement in takeoff/landing lift coefficient and cruise efficiency. The wings of CFJ-EA2 utilize a super-lifting CFJ airfoil and a modified high-efficiency CFJ cruise airfoil for takeoff/landing and cruise respectively. The CFJ-EA2 wings are designed to be pivotable to achieve ultra-high lift coefficient at high AoAs for takeoff/landing and high aerodynamic efficiency at lower AoAs for cruise. For the takeoff/landing condition, the 3D steady RANS simulations are performed at the AoAs of 30°, 40°, and 50°with the Cµvarying from 0.2 to 0.6. It indicates that using the super-lifting airfoil, the CFJ-EA2 can achieve a maximum lift coefficient of 6.9 at a high AoA of 50°. For the cruise condition, an improved CFJ cruise airfoil is utilized on the CFJ-EA2 to have a higher wing loading and better cruise efficiency. The lift coefficient of CFJ-EA2 wings is 1.59 and the wing loading is increased to 214 kg/m2The aerodynamic efficiency (L/D)cis increased to 31 and the productivity efficiency (CL 2/CD)cis 50, which is 51% higher than the previous design. The gross weight of CFJ-EA2 is 2289 kg because of its high wing loading; and the range is extended to 531 nm due to higher cruise efficiency and more batteries installed.
AB - The Co-Flow Jet (CFJ) flow control is a promising technology that can achieve high wing loading and aerodynamic efficiency at cruise and ultra-high lift coefficient at takeoff/landing. A conceptual electric airplane design utilizing CFJ flow control (CFJ-EA) was designed by Lefebvre and Zha [1]. Recently, the super lift coefficient (SLC) of CFJ airfoil that exceeds theoretical lift coefficient limit was achieved at ultra-high angle of attack (AoA) [2]. The purpose of this paper is to present an improved design of CFJ-EA (CFJ-EA2) with the performance improvement in takeoff/landing lift coefficient and cruise efficiency. The wings of CFJ-EA2 utilize a super-lifting CFJ airfoil and a modified high-efficiency CFJ cruise airfoil for takeoff/landing and cruise respectively. The CFJ-EA2 wings are designed to be pivotable to achieve ultra-high lift coefficient at high AoAs for takeoff/landing and high aerodynamic efficiency at lower AoAs for cruise. For the takeoff/landing condition, the 3D steady RANS simulations are performed at the AoAs of 30°, 40°, and 50°with the Cµvarying from 0.2 to 0.6. It indicates that using the super-lifting airfoil, the CFJ-EA2 can achieve a maximum lift coefficient of 6.9 at a high AoA of 50°. For the cruise condition, an improved CFJ cruise airfoil is utilized on the CFJ-EA2 to have a higher wing loading and better cruise efficiency. The lift coefficient of CFJ-EA2 wings is 1.59 and the wing loading is increased to 214 kg/m2The aerodynamic efficiency (L/D)cis increased to 31 and the productivity efficiency (CL 2/CD)cis 50, which is 51% higher than the previous design. The gross weight of CFJ-EA2 is 2289 kg because of its high wing loading; and the range is extended to 531 nm due to higher cruise efficiency and more batteries installed.
UR - http://www.scopus.com/inward/record.url?scp=85051747940&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85051747940&partnerID=8YFLogxK
U2 - 10.2514/6.2018-4208
DO - 10.2514/6.2018-4208
M3 - Conference contribution
AN - SCOPUS:85051747940
SN - 9781624105593
T3 - 2018 Applied Aerodynamics Conference
BT - 2018 Applied Aerodynamics Conference
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - 36th AIAA Applied Aerodynamics Conference, 2018
Y2 - 25 June 2018 through 29 June 2018
ER -