Externally blown elevon applied for the longitudinal control of blended wing body transport with podded engines

Xin, Zhenqing; Chen, Zhenli; Gu, Wenting; Zhou, Minghui; Zhang, Binqian

doi:10.1016/j.ast.2019.105324

Cited by 6 publications

(2 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Compared to conventional configurations, the Blended Wing Body (BWB) or Hybrid Wing Body (HWB) layout significantly reduces the wetted area. It has more significant advantages in terms of drag and noise reduction [1][2][3][4][5][6]. However, limited longitudinal control authority due to the short lever arm of the BWB layout is a critical challenge.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Combined Blowing Control of a Hybrid Wing Body Aircraft

et al. 2023

View full text Add to dashboard Cite

Combined blowing was performed on a Hybrid Wing Body (HWB) aircraft through wind tunnel testing at a Reynolds number of 1.75 × 106. The full cycle of separation and reattachment under the control of combined blowing was implemented using Computational Fluid Dynamics (CFD), and the mechanism of combined blowing inhibiting separation was analyzed. The aerodynamic characteristics of the baseline and the independent effects of the blown deflected trailing edge (TE), blown leading edge (LE), and combined blowing on the TE and LE were investigated. The results clearly show that combined blowing can inhibit the development of cross-flow, reduce the accumulation of a boundary layer at the tip, and inhibit the flow separation effect. The effect of using seamless simple flaps alone to increase the lift is limited; blowing control is required to enhance the lift further. Applying the blown deflected TE can improve the lift linear segment, so that 30° flap achieves the lift gain of 40° flap without control, while the drag coefficient is approximately 0.02 smaller, but the stall gradually advances. Using the blown LE can significantly increase the stall angle from 12° to 18°. However, the lift linear segment remains unaffected. In particular, combined blowing can achieve the control effect of improving the lift linear segment, delaying stall, and decreasing drag. Moreover, the maximum lift coefficient is approximately 0.19, and the lift-to-drag ratio increment in the control state with a 30° flap deflection angle is above 2.2 in the angle of attack range of 4° to 12° compared to the uncontrolled state with a 40° flap deflection angle.

show abstract

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Combined Blowing Control of a Hybrid Wing Body Aircraft

et al. 2023

View full text Add to dashboard Cite

show abstract

“…As a high-performance aircraft, BWB is very suitable for "Green Aviation" [9]. With the emphasis on the environment and the pursuit of high-performance aircraft, BWB has attracted the attention of many countries around the world [10,11]. In 1997, a 17 ft span model aircraft-BWB-17 designed by Boeing combined with NASA and Stanford University-demonstrated the feasibility of BWB [12,13].…”

Section: Introductionmentioning

confidence: 99%

Design Improvement of a BWB Aerodynamic Performance at Cruise and Take-Off Speeds

Duan

2022

International Journal of Aerospace Engineering

View full text Add to dashboard Cite

As a high-performance aircraft, BWB (blended wing body) has attracted the attention of many countries around the world. A 300-seat BWB design is proposed by the Airplane Concept Design Institute of Northwestern Polytechnical University, which is also called SWB. The aerodynamic performance of it is evaluated by CFD (computational fluid dynamics). The CFD calculation method is based on RANS (Reynolds-averaged Navier–Stokes), and it is verified by wind tunnel test results at take-off speed. However, the aerodynamic design of the SWB needs to be improved to meet the market demand to increase its cruise Mach number from 0.8 to 0.85. To achieve this goal, firstly, based on the previous calculation and analysis results, the basic shape of SWB is improved by using “aft-body extending” technology and discrete adjoint optimization method. Then, the winglets are applied to the improved basic shape to improve its cruise speed aerodynamic performance, and the Krueger flaps are applied as its high-lift device to improve its take-off and landing aerodynamic performance. The CFD calculation and wind tunnel test results show that these improvements make SWB-2 have a good aerodynamic performance at the Mach number of 0.85. Therefore, these design improvements are appropriate and effective for improving the aerodynamic performance of BWB.

show abstract

Research on analytical scaling method and scale effects for subscale flight test of blended wing body civil aircraft

Wang

Zhou

Tao

et al. 2020

Aerospace Science and Technology

View full text Add to dashboard Cite

Externally blown elevon applied for the longitudinal control of blended wing body transport with podded engines

Cited by 6 publications

References 10 publications

Experimental Investigation on the Combined Blowing Control of a Hybrid Wing Body Aircraft

Experimental Investigation on the Combined Blowing Control of a Hybrid Wing Body Aircraft

Design Improvement of a BWB Aerodynamic Performance at Cruise and Take-Off Speeds

Research on analytical scaling method and scale effects for subscale flight test of blended wing body civil aircraft

Contact Info

Product

Resources

About