The Effect of Inboard and Outboard Wing Sweep Angles to Lift-to-Drag Ratio of a Compound Wing-Body Using Panel Code

Rizal E. M. Nasir ； Nabil F. Tajuddin ； Atikah B. A. Muta'ali ； Wahyu Kuntjoro ； Wirachman Wisnoe ； Fairuz I. Romli

《Journal of Aeronautics, Astronautics and Aviation》 53卷2期 Vol.53 No.2 ISSA 2020 Special Issue (2021/06) Pp. 155-164

https://doi.org/10.6125/JoAAA.202106_53(2).07

摘要

Compound wing consists of inboard and outboard wings and it is essential to look at these sweep angles' impact to aerodynamic performance. In this paper, the effect of inboard and outboard wing leading-edge sweep angle to lift-to-drag ratio of compound wing-body aircraft is investigated. The method of investigating aerodynamics is via computation using Panel Code in OpenVSP software combine with calculation of parasite drag coefficient based on Blasius' friction coefficient equations and Torenbeek's form factor. Baseline-IX BWB becomes the base design of this study where there are a total of ten inboard and outboard sweep angle cases. Comparison between panel code computation and wind tunnel experiment results shows similar trend and magnitude up to 10.0 deg. angle of attack. The trend of all cases is similar to the original case where maximum L/Ds for almost all cases also occur at α= +6.0 deg. The cases where Li = 45 deg. have the highest lift-to-drag ratio, followed by Li = 30 deg. and the lowest are for Li = 15 deg. No explanation behind the trend can be concluded unless detail visualization experiments and computations are executed.

關鍵字

Aerodynamics ； Flying Wing ； Blended Wing-Body

參考文獻

Latif MZAA, Ahmad MA, Nasir REM, Wisnoe W, Saad MR, “An analysis on 45° sweep tail angle for blended wing body aircraft to the aerodynamics coefficients by wind tunnel experiment,” IOP Conference Series: Material Sciences and Engineering, Vol. 270, No. 1, 2017, pp. 012001

Shim HJ, Park SO, “Low-speed wind-tunnel test results of a BWB-UCAV model,” Procedia Engineering, Vol. 67, No. 1, 2013, pp. 50-58.

Philip M, Kusnur V, Manvi P, “Design Optimization of a Ducted Fan Blended Wing Body UAV using CFD Analysis,” International Journal of Engineering Research, Vol. 4, September 2015, pp. 158-165.

Muta’ali, ABA, Nasir REM., Wisnoe W, Kuntjoro W, “Aerodynamic Performance of a Tail-less Blended Wing-Body Small Transport Aircraft,” Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, Vol. 66, No. 1, 2020, pp. 135-150

Ba Zuhair MA, “Trailing edge geometry effect on the aerodynamics of low-speed BWB aerial vehicles,” Advances in Aircraft and Spacecraft Science, Vol. 6, No. 4, 2019, pp. 283-296.