Unsteady Flow Mechanism Investigation on Pitching-Blade Rigid Nano Rotor

Zhao, Shanyong; Liu, Z.; Bu, Chen; Che, P. L.; Dang, Tianjiao

doi:10.1007/978-981-13-3305-7_66

Cited by 3 publications

(2 citation statements)

References 26 publications

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“…It has a variety of flying capabilities such as lowspeed flight, vertical take-off and landing, and hovering. Therefore, it has important military and civilian values, [1][2][3][4] such as unmanned reconnaissance, information transmission, and target tracking tasks in complex and narrow spaces, as well as environmental monitoring, disaster investigation, search, etc. However, the nano rotor is flying at a low Reynolds number, the influence of the viscous force increases significantly, and it is easy to cause laminar flow separation and reduce the aerodynamic performance of the rotor.…”

Section: Introductionmentioning

confidence: 99%

Investigation on aerodynamic characteristics of bionic membrane nano rotor

Zhao

Liu

Lü

et al. 2021

International Journal of Micro Air Vehicles

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In this paper, the bionic membrane structure is introduced to improve the aerodynamic performance of nano rotor at the low Reynolds number. The aerodynamic characteristics of nano rotor made of hyperelastic material as membrane blades are studied. Firstly, based on the hyperelastic constitutive model, a finite element model of the rotor is established and compared with the results of the modal test to verify the accuracy of the model. Then the computational fluid dynamics model of membrane nano rotor is established which combined with the finite element model. The aerodynamic characteristics of the membrane rotor under hovering conditions are studied using fluid–structure interaction method. It is found that the calculation results matched well with the experiment results. The design of the structural parameters such as the membrane proportion, shape, and position of the membrane rotor is optimized. The influence of each parameter on the aerodynamic performance of the rotor is obtained. Under certain structural conditions, the performance can be effectively improved, which provides a new idea for the design of the nano rotor.

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Section: Introductionmentioning

confidence: 99%

Investigation on aerodynamic characteristics of bionic membrane nano rotor

Zhao

Liu

Lü

et al. 2021

International Journal of Micro Air Vehicles

View full text Add to dashboard Cite

show abstract

“…The rotor plays a major role in propulsion of the rotary air vehicle, which is always important in rotor design [1][2][3][4][5][6][7][8][9]. Nano rotor is characterised by the small size and low rotational velocity causing that its operational Reynolds number is very low.…”

Section: Introductionmentioning

confidence: 99%

Bio‐inspired nano rotor investigation based on UVLM

Zhao

Liu

Sun

et al. 2020

Biosurface and Biotribology

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Nano rotor is of great value in military and civilian applications. Due to its nano size, it works at an ultra-low Reynolds number and aerodynamic performance deteriorates dramatically. The bio-inspired nano rotor is carried out to improve the rotor propulsive performance. Unsteady vortex lattice method (UVLM) model is established fully considering the influence of induced drag and wake vortex distortion on aerodynamic forces. The aim is to quickly and accurately simulate the flow field around the bio-inspired nano rotor and to efficiently perform the aerodynamic calculation to optimise the design of the bio-inspired rotor. The rotor parameters and motion parameters such as aspect ratio, taper ratio and camber are studied using UVLM. It is found that the aerodynamic performance of the rotor increased with the aspect ratio. The quality factor changes parabolically with the taper ratio and camber, and there is an optimal value for the ratio and camber, respectively. The influences of pitching angle and frequency are investigated as well. Results show that the bio-inspired motion improves the propulsion performance of nano rotor. 2 Computational methods 2.1 Aerodynamic model For the unsteady motion of the rotor, the direction of the overall axis of rotation is selected as the Z-axis direction, the span of the rotor Biosurface and Biotribology

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Investigation of Bioinspired Flow for a Nano Coaxial Rotor in Hover

Liu

Ren

et al. 2021

J. Aerosp. Eng.

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Unsteady Flow Mechanism Investigation on Pitching-Blade Rigid Nano Rotor

Cited by 3 publications

References 26 publications

Investigation on aerodynamic characteristics of bionic membrane nano rotor

Investigation on aerodynamic characteristics of bionic membrane nano rotor

Bio‐inspired nano rotor investigation based on UVLM

Investigation of Bioinspired Flow for a Nano Coaxial Rotor in Hover

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