Novel Quadrotor Forward-Flight Model Based on Wake Interference

Luo, Jiawei; Zhu, Ling; Yan, Guozheng

doi:10.2514/1.j053011

Cited by 40 publications

(24 citation statements)

References 16 publications

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“…The geometry, the section direction of the blade element theory is showed in Figures 3 and 4. The induced velocity and thrust under generalized motion is [18,[24][25][26]:…”

Section: Thrust T Rotor Disk Areamentioning

confidence: 99%

“…Yasuda proposed a coupled flow simulation method, which is leading a fundamental understanding of the flight behavior of the quadrotor [17]. Luo, et al, proposed a mathematical model at forward flight considering the interference of the rotor in hovering [18]. Powers discussed the modeling of the quadrotor under different flight conditions, including lower wind speeds considering the ground effect [19].…”

Section: Introductionmentioning

confidence: 99%

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Aerodynamic Performance of Quadrotor UAV with Non-Planar Rotors

Lei

Wang

2019

Applied Sciences

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The mobility of a quadrotor UAV is significantly affected by its aerodynamics, especially when the closely spaced rotors are applied in the multi-rotor system. This paper addresses the aerodynamic modeling of non-planar quadrotor UAV with various rotor spacing (1 d–2 d) and disk plane angle (0–50 deg). The inter-rotor interference and the power models are also proposed in this paper. In order to validate the non-planar model, a series of CFD analyses and experiments were conducted. The obtained results demonstrate that the flow field of the non-planar quadrotor is extremely complicated when the unsteady flow is involved. The pulsation of partial angle of attack and pressure distribution is formed when the blade passes through the vortex. The thrust is increasing significantly along with the tilt angle, resulting from the stronger outflow of the non-planar rotors, which is also leading the power increment. However, the thrust increment is not that obvious when the spacing is larger than 1.4 d. The experiments and the numerical simulation results provide consistent trends and demonstrate the effectiveness of the aerodynamic model of the non-planar quadrotor. The comparison with the traditional planar quadrotor validates that the proposed non-planar quadrotor has better aerodynamic and control performances with a larger power loading.

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“…The geometry, the section direction of the blade element theory is showed in Figures 3 and 4. The induced velocity and thrust under generalized motion is [18,[24][25][26]:…”

Section: Thrust T Rotor Disk Areamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Aerodynamic Performance of Quadrotor UAV with Non-Planar Rotors

Lei

Wang

2019

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…The aerodynamic interference problems have been recognized by the researchers who focus on multi-rotor aircraft. Luo et al established a mutual-interference model to consider the aerodynamic interactions for a four rotor system [2], which modeled the rotor system in forward flight as an equivalent circular fixed wing. This model was validated by CFD analysis, and could account for rotor interference reasonably well.…”

Section: Introductionmentioning

confidence: 99%

“…The implicit aerodynamic interference model derived by Luo et al [2] is similar as the explicit model used by Nguyen et al [5], and both models treat the rotors into equivalent circular wings. The aerodynamic interference between any two rotors is measured by the induced velocity at one rotor generated by the horseshoe vortex trailed from the other.…”

Section: Introductionmentioning

confidence: 99%

“…The aerodynamic interference between any two rotors is measured by the induced velocity at one rotor generated by the horseshoe vortex trailed from the other. In this work, an explicit expression for the implicit interference model used by Luo et al [2] is derived, which can significantly reduce the computing time. An general expression for the induced velocity considering the aerodynamic interference between any two rotors is given without any neglect of the effect of one rotor on the other.…”

Section: Introductionmentioning

confidence: 99%

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