Computational Fluid Dynamics Modeling of a Pneumatic Air Jet Nozzle for an application in Coffee Fruit Harvesting

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41340%2F22%3A92457" target="_blank" >RIV/60460709:41340/22:92457 - isvavai.cz</a>

Výsledek na webu

<a href="https://ieeexplore.ieee.org/document/9872877" target="_blank" >https://ieeexplore.ieee.org/document/9872877</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/ICECET55527.2022.9872877" target="_blank" >10.1109/ICECET55527.2022.9872877</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Computational Fluid Dynamics Modeling of a Pneumatic Air Jet Nozzle for an application in Coffee Fruit Harvesting

Popis výsledku v původním jazyce

This study deals with the design of a pneumatic air-jet nozzle for coffee fruits harvesting purposes. In steady-state conditions, a CFD finite element model was implemented to validate the nozzle design. We studied variations in the cavity length and outlet diameter of the nozzle under 5 bar of pressure and 140 Lt/min of caudal flow. Using additive manufacturing, three prototypes of the nozzles were created in onyx material. In addition, a pneumatic assembly was built by integrating a nozzle with a solenoid electro valve that allowed air to be discharged from a compressor. Using a high-speed video camera, we conducted an experiment to understand the air jet morphometry of each nozzle. The electro valve was operated at 42 Hz and the operating conditions were chosen based on simulations. CFD-derived velocity was compared with the filmed jets from the experiments to illustrate its turbulence. The results were analyzed in terms of their capacity to produce punctual impacts on coffee fruits Coffea Arabica L. var Castillo. The results of this study suggest that future studies could be conducted to investigate the impact capacity of pneumatic air-jet nozzles on coffee fruit excitation in terms of vibrational measurements.

Název v anglickém jazyce

Computational Fluid Dynamics Modeling of a Pneumatic Air Jet Nozzle for an application in Coffee Fruit Harvesting

Popis výsledku anglicky

This study deals with the design of a pneumatic air-jet nozzle for coffee fruits harvesting purposes. In steady-state conditions, a CFD finite element model was implemented to validate the nozzle design. We studied variations in the cavity length and outlet diameter of the nozzle under 5 bar of pressure and 140 Lt/min of caudal flow. Using additive manufacturing, three prototypes of the nozzles were created in onyx material. In addition, a pneumatic assembly was built by integrating a nozzle with a solenoid electro valve that allowed air to be discharged from a compressor. Using a high-speed video camera, we conducted an experiment to understand the air jet morphometry of each nozzle. The electro valve was operated at 42 Hz and the operating conditions were chosen based on simulations. CFD-derived velocity was compared with the filmed jets from the experiments to illustrate its turbulence. The results were analyzed in terms of their capacity to produce punctual impacts on coffee fruits Coffea Arabica L. var Castillo. The results of this study suggest that future studies could be conducted to investigate the impact capacity of pneumatic air-jet nozzles on coffee fruit excitation in terms of vibrational measurements.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20302 - Applied mechanics

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

2022 International Conference on Electrical, Computer and Energy Technologies

ISBN

978-1-6654-7087-2

ISSN

—

e-ISSN

—

Počet stran výsledku

7

Strana od-do

1-7

Název nakladatele

Institute of Electrical and Electronics Engineers

Místo vydání

Praha

Místo konání akce

Praha

Datum konání akce

20. 7. 2022

Typ akce podle státní příslušnosti

CST - Celostátní akce

Kód UT WoS článku

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