Mean and turbulent flow characteristics of downwash air flow generated by a single rotor blade in agricultural drones

Shouji, Cheng; Dafsari, Reza Alidoost; Yu, Seung-Hwa; Choi, Yong

doi:10.1016/j.compag.2021.106471

Cited by 13 publications

(2 citation statements)

References 38 publications

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“…When the application was made with the XR 11001 nozzle, the RPA application showed a higher deposition (1,615 μg cm -²) than the ground application (1,087 μg cm -²), indicating that the application method altered the deposition. Shouji et al (2021) reported that the atomization characteristics of the spray nozzles are greatly affected by the downward air flow, which could explain this difference in spray deposition.…”

Section: Depositionmentioning

confidence: 99%

Evaluation of Remotely Piloted Aircraft for Agricultural Spraying in Corn Cultivation in the Brazilian Savannah

Lopes,

Cunha,

Nomelini

2023

JSD

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This study aimed to evaluate the quality of application using both RPA and ground techniques in corn cultivation using different spray nozzles in Brazilian savannah (Cerrado). The experiment was conducted using a completely randomized design, with four treatments and eight repetitions. The treatments involved two methods of application: aerial (RPA, 10 L ha-1) and ground (backpack sprayer, 100 L ha-1); and two types of nozzles: the standard flat fan nozzle XR 11001 and the air induction flat fan nozzle AirMix 11001. To study the quality of the application, the deposition was evaluated using a tracer and spectrophotometry, and the droplet spectrum, evaluated through the analysis of water-sensitive paper. Furthermore, a study on application quality was conducted using the Statistical Process Control methodology. The results demonstrated that with RPA, the deposition was higher, and the AirMix 11001 nozzle also stood out in this variable. No non-random behavior was observed in the deposition. Ground application showed the best performance in terms of target coverage and droplet density. The XR 11001 nozzle resulted in a higher droplet density. Overall, the XR11001 nozzle and the RPA application showed smaller volume median diameters (VMDs), indicating a higher potential for drift, which should be taken into account. Given the results obtained, it can be stated that the use of RPAs for agricultural spraying is viable for application.

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Section: Depositionmentioning

confidence: 99%

Evaluation of Remotely Piloted Aircraft for Agricultural Spraying in Corn Cultivation in the Brazilian Savannah

Lopes,

Cunha,

Nomelini

2023

JSD

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“…Recently, use of multirotor drones are expected in various engineering and scientific fields including filming, agriculture, rescue, site inspections, and transportation because of the vertical take-off and landing capability and relatively ease of control (Gordana et al, 2015;Yang et al, 2016;Andria et al, 2018;Hassanalian and Abdelkefi, 2017;Mohad et al, 2019;Melita et al, 2020;Czyż and Wendeker, 2020;Shouji et al, 2021). Particularly, a wind environmental measurement using the hovering capability of the multirotor drones has been attracted a lot of attention (Matthias et al, 2010;Zhang and Kovacs, 2012;Palomaki et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Effects of gusty flow on aerodynamic performance of multirotor drone propellers in hovering flight

Murakami

Abe

Aono

et al. 2022

JFST

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The effects of cross flow and fluctuating cross flow on the aerodynamic performance of multirotor drone propellers were investigated by using wind tunnel testing and numerical simulations. Three hovering propellers were examined and were designed based on Adkins and Liebeck theory with modifications. Thrust coefficient 𝐶 and power coefficient 𝐶 of each propeller were experimentally measured and Figure of Merit 𝐹𝑀 was evaluated. From the cross flow experiments and numerical simulations, 𝐶 , 𝐶 and 𝐹𝑀 calculated were in reasonable agreement with the experimental results at high cross flow velocity. The results implicated that a stall might occur at near the root of the propeller as well as demonstrated that the starting point of the propeller design played a role in aerodynamic performance under the cross flow conditions. Moreover, from the fluctuating cross flow experiments, 𝐶 , 𝐶 and 𝐹𝑀 fluctuated in time and the propellers are more susceptible to cross flow and fluctuating cross flow at lower rotational speed in terms of the amount of change of aerodynamic forces.

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Efficacy of cotton harvest aids applications with unmanned aerial vehicles (UAV) and ground-based field sprayers – A case study comparison

Cavalaris¹,

Karamoutis²,

Markinos³

2022

Smart Agricultural Technology

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Mean and turbulent flow characteristics of downwash air flow generated by a single rotor blade in agricultural drones

Cited by 13 publications

References 38 publications

Evaluation of Remotely Piloted Aircraft for Agricultural Spraying in Corn Cultivation in the Brazilian Savannah

Evaluation of Remotely Piloted Aircraft for Agricultural Spraying in Corn Cultivation in the Brazilian Savannah

Effects of gusty flow on aerodynamic performance of multirotor drone propellers in hovering flight

Efficacy of cotton harvest aids applications with unmanned aerial vehicles (UAV) and ground-based field sprayers – A case study comparison

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