Departure characteristics of blended-wing-body aircraft

FU Junquan; SHI Zhiwei; CHEN Jie; ZHOU Mengbei; WU Dawei; PAN Lijun

doi:10.11729/syltlx20190110

Volume 34 Issue 6

Dec. 2020

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Journal of Experiments in Fluid Mechanics > 2020 > 34(6): 32-37. > DOI: 10.11729/syltlx20190110

FU Junquan, SHI Zhiwei, CHEN Jie, ZHOU Mengbei, WU Dawei, PAN Lijun. Departure characteristics of blended-wing-body aircraft[J]. Journal of Experiments in Fluid Mechanics, 2020, 34(6): 32-37. DOI: 10.11729/syltlx20190110

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Departure characteristics of blended-wing-body aircraft

1.
Key Laboratory of Unsteady Aerodynamics and Flow Control, Ministry of Industry and Information Technology, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
2.
COMAC Shanghai Aircraft Design and Research Institute, Shanghai 201210, China

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Received Date: September 09, 2019
Revised Date: November 10, 2019

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Abstract

Abstract

Static force measurements of blended-wing-body aircraft at high angles of attack were carried out in the 1 m low speed wind tunnel of Nanjing University of Aeronautics and Astronautics. By fully mining and analyzing the experimental results, the approximate initial departure angle of attack and departure region of BWB aircraft are obtained by using multiple criteria, including the static stability derivative, the dynamic directional stability parameter, the lateral control departure parameter and the Weissman chart. Besides, the spin sensitive region of BWB aircraft is predicted. At the same time, the departure is simulated by the virtual flight test in wind tunnel. The results show that the lateral stability of BWB aircraft is poor, and the non-command roll motion may occur at a very small angle of attack, which is also the main reason for the divergence of the departure. And the departure characteristics obtained from the virtual flight test and these stability criteria are in good consistency, which verifies the reliability of the virtual flight test in departure characteristics research.
- blended-wing-body,
- departure characteristics,
- virtual flight test,
- stability criterion

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