Wind tunnel studies of wind turbine yaw and speed control effects on the wake trajectory and thrust stabilization

Castillo, Ricardo; Pol, Suhas

doi:10.1016/j.renene.2022.03.015

Cited by 8 publications

(1 citation statement)

References 12 publications

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“…The decay of turbulence from the inlet to the aircraft results in very low turbulence intensity at the free stream close to the aircraft, as opposed to real conditions experienced in the wind tunnel [58]. The CFD incoming flow, as shown in Figures 13 and 15, is perfectly laminar upon reaching the aircraft geometry, while recent measurements from a different work have shown that the streamwise turbulence intensity at the center of the test section is 1.2% at an average flow velocity of 10.85 m/s [59]. Higher-than-expected turbulence intensity delays flow separation in the wind tunnel model, leading to higher lift coefficients for both variants and separation phenomena of different behaviors from the CFD results.…”

Section: Resultsmentioning

confidence: 86%

Exploring the Performance Boundaries of a Small Reconfigurable Multi-Mission UAV through Multidisciplinary Analysis

Santos,

Rogers,

De Rezende

et al. 2023

Aerospace

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The performance of a small reconfigurable unmanned aerial vehicle (UAV) is evaluated, combining a multidisciplinary approach in the computational analysis of additive manufactured structures, fluid dynamics, and experiments. Reconfigurable UAVs promise cost savings and efficiency, without sacrificing performance, while demonstrating versatility to fulfill different mission profiles. The use of computational fluid dynamics (CFD) in UAV design produces higher accuracy aerodynamic data, which is particularly important for complex aircraft concepts such as blended wing bodies. To address challenges relating to anisotropic materials, the Tsai–Wu failure criterion is applied to the structural analysis, using CFD solutions as load inputs. Aerodynamic performance results show the low-speed variant attains an endurance of 1 h, 48 min, whereas its high-speed counterpart is 29 min at a 66.7% higher cruise speed. Each variant serves different aspects of small UAS deployment, with low speed envisioned for high-endurance surveying, and high speed for long-range or time-critical missions such as delivery. The experimental and simulation results suggest room for design iteration, in wing area and geometry adjustments. Structural simulations demonstrated the need for airframe improvements to the low-speed configuration. This paper highlights the potential of reconfigurable UAVs to be useful across multiple industries, advocating for further research and design improvements.

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Section: Resultsmentioning

confidence: 86%