نتائج البحث - "Nozzle"

1

Academic Journal

Characterization of the Droplet Population Generated by Centrifugal Atomization Nozzles of UAV Sprayers.

المؤلفون: Baio, Fábio Henrique Rojo¹ (AUTHOR) fabio.baio@ufms.br, Oliveira, Job Teixeira de¹ (AUTHOR) job.oliveira@ufms.br, Alves, Marcos Eduardo Miranda¹ (AUTHOR) larissa_ribeiro@ufms.br, Teodoro, Larissa Pereira Ribeiro¹ (AUTHOR) paulo.teodoro@ufms.br, Cunha, Fernando França da² (AUTHOR) fernando.cunha@ufv.br, Teodoro, Paulo Eduardo¹ (AUTHOR)

المصدر: AgriEngineering. Jan2025, Vol. 7 Issue 1, p15. 13p.

مصطلحات موضوعية: *NOZZLE testing, *DRONE aircraft, *AGRICULTURAL drones, *ATOMIZATION, *EXPERIMENTAL design, *SPRAY nozzles

2

Academic Journal

Droplet size, velocity, and spray coverage from a magnetic-assisted sprayer.

المؤلفون: Butts, Thomas R.¹ (AUTHOR) buttst@purdue.edu, Virk, Simerjeet S.^1,2 (AUTHOR), Kouame, Koffi Badou-Jeremie¹ (AUTHOR)

المصدر: Biosystems Engineering. Sep2024, Vol. 245, p1-11. 11p.

مصطلحات موضوعية: *NOZZLE testing, *SPRAY droplet drift, *PEST control, *WEED control, *REDUCTION potential, *PESTICIDES

3

Academic Journal

Effect of fuel type on spatial distribution characteristics for nozzle erosion in hybrid rocket motors.

المؤلفون: Tian, Hui^1,2 (AUTHOR), Jiang, Xianzhu^1,2 (AUTHOR), Zhu, Hao^1,2 (AUTHOR) zhuhao@buaa.edu.cn, Wang, Zhongshuo³ (AUTHOR), Cai, Guobiao^1,2 (AUTHOR)

المصدر: Acta Astronautica. Sep2024, Vol. 222, p191-206. 16p.

مصطلحات موضوعية: *NOZZLE testing, *ROCKET engines, *COMBUSTION chambers, *MOTOR fuels, *FIRE testing

4

Dissertation/ Thesis

Advances on spray drift assessment in 3d crops

المؤلفون: Torrent Martí, Xavier

المساهمون: University/Department: Universitat de Lleida. Departament d'Enginyeria Agroforestal

Thesis Advisors: Planas de Martí, Santiago, Rosell Polo, Joan Ramon

المصدر: TDX (Tesis Doctorals en Xarxa)

مصطلحات موضوعية: Producte fitosanitari, potencial de reducció de deriva, bandes de seguretat, Classificació de broquets, polvoritzador, Sistema Lidar, túnel de vent, làser d'efecte Doppler, Producto fitosanitario, potencial de reducción de deriva, bandas de seguridad, Clasificación de boquillas, pulverizador, Sistema Lidar, túnel de viento, láser de efecto Doppler, Pesticide, spray drift potential reduction, buffer zones, Nozzle classification, sprayer, Lidar system, wind tunnel, PDPA, Enginyeria Agroforestal

وصف الملف: application/pdf

URL الوصول: http://hdl.handle.net/10803/673105

View record in TDX

5

Dissertation/ Thesis

Contribució a l'estudi de la impressió 3D per a la fabricació de models per facilitar l'assaig d'operacions quirúrgiques de tumors

المؤلفون: Fenollosa Artés, Felip

المساهمون: University/Department: Universitat Politècnica de Catalunya. Departament d'Enginyeria Mecànica

Thesis Advisors: Buj Corral, Irene, Gomà Ayats, Joan Ramon

المصدر: TDX (Tesis Doctorals en Xarxa)

مصطلحات موضوعية: This doctoral thesis has been focused on the challenge to obtain, using Additive Manufacturing (AM), models for surgical planning, under the premise that the equipment to obtain them should be accessible to the hospital field. The objective is to spread the use of prototypes as a surgical training tool, upgrading medical practice in the same way that technologies which enhanced radiographs at the time. The reason for using AM, instead of more traditional technologies, is its capacity to materialise, in a straight way, the digital data of the patient anatomy coming from three-dimensional scanning systems, making it possible to achieve personalised models. The results are basically the generation of new knowledge in order to create accessible multi-material 3D printing machines that would allow to obtain models mimicking living tissues. Related to the will to spread this technology, research has focused on open source technologies, mainly Fused Filament Fabrication (FFF), and similar technologies based on catalitzable liquids. This research is aligned with the development work related to AM at CIM UPC, and in this special field there is a close cooperation with Hospital Sant Joan de Déu in Barcelona (HSJD). The first section of the thesis includes a description of the state of the art, including the existing technologies and their application within the medical field. For the first time, basis have been laid for the characterisation of living tissues – primarily soft tissues – to support the selection of materials mimicking them in an AM process, so as to improve the surgical planning experience. The stiffness linked to most of the materials commonly used in 3D printing, makes them unhelpful to simulate tumours and other anatomic references. Then, parameters like density, viscoelasticity, soft materials industry characterisation, soft tissues and vessels elastic modulus, its hardness, mimicking blood and sterilisation requirements, are successively treated. The second section starts exploring FFF 3D printing. Processes are classified from the point of view of multi-materiality, a key factor for surgical planning models, telling multi-nozzle solutions from mixing printheads solutions. A study about probable useful materials (both filaments and liquids) to mimic soft tissues is included. It is stated how liquids, compared to filaments, are more demanding related to additive manufacturing processes, and different ways to print very soft materials are detailed. Finally, six real cases – in which the doctorate has participated in these last years –, involving collaboration with HSJD, are reported. In the origin it can be found the difficulty to perform tumour resection surgeries to children, like neuroblastoma type, and the initiative of Dr. Lucas Krauel. Finally, Section 3 is devoted to the exploration of many concepts (up to 8), activity performed along the last five years thanks to the technical resources of CIM UPC and the academic activity of the UPC students, related to their final degree thesis, therefore reaching the construction of several machines and mechanisms to test them. The wide and systematic research about these concepts makes closer the day to reach a desktop 3D printing multimaterial solution. It is found that the best way to progress is having a plurality of independent printheads in order to enable a 3D printer to integrate some of the researched concepts, thus materialising a possible solution. To sum up, it is raised how a 3D printer for surgical training models should be like, for the purpose of serving as a basis for new developments., Àrees temàtiques de la UPC::Enginyeria mecànica

وصف الملف: application/pdf

URL الوصول: http://hdl.handle.net/10803/667421

View record in TDX

6

Academic Journal

Impact of nozzle pressure ratio and convergent-divergent length on the exit Mach number of supersonic jet

المؤلفون: Subramani, Nithya, M., Sangeetha, G., Gowtham

المصدر: Aircraft Engineering and Aerospace Technology, 2025, Vol. 97, Issue 2, pp. 291-300.

URL الوصول: http://www.emeraldinsight.com/doi/10.1108/AEAT-04-2024-0109

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7

Academic Journal

Results of experimental evaluation of the possibility of using an annular nozzle with a flat central body as part of a stand liquid rocket engine chamber

المؤلفون: A. A. Kirshina, A. A. Levikhin, A. Yu. Kirshin

المصدر: Вестник Самарского университета: Аэрокосмическая техника, технологии и машиностроение, Vol 23, Iss 4, Pp 125-132 (2024)

مصطلحات موضوعية: annular nozzle, laval nozzle, experiment, research, specific impulse, rocket engine, Motor vehicles. Aeronautics. Astronautics, TL1-4050

وصف الملف: electronic resource

Relation: https://journals.ssau.ru/vestnik/article/viewFile/28071/10932; https://doaj.org/toc/2542-0453; https://doaj.org/toc/2541-7533

URL الوصول: https://doaj.org/article/4278cb51deb34682800c904ec6ffd0f6

View record in DOAJ

8

Academic Journal

DESIGN AND OPTIMIZATION OF A VACUUM SYSTEM FOR A LARGE STORAGE TANK CLEANING ROBOT.

المؤلفون: Yong TIAN¹, Zhengtao WANG², Jian SONG¹, Fuxiang XIE¹ 20210007@wfu.edu.cn, Hongwei WANG¹

المصدر: INMATEH - Agricultural Engineering. 2024, Vol. 73 Issue 2, p668-677. 10p.

مصطلحات موضوعية: *NOZZLE testing, *STORAGE tanks, *STRUCTURAL optimization, *PARTICLE tracks (Nuclear physics), *WIND speed, *DUST

9

Academic Journal

CENTRIFUGAL SPRAYING SYSTEM DESIGN AND DROPLET DISTRIBUTION CHARACTERIZATION FOR MAIZE PLANT PROTECTION UAV.

المؤلفون: Jiaxun HE¹, Keke SUN¹, Taojie WANG¹, Zhihua SONG¹, Lichao LIU^1,2 llchao@ahau.edu.cn

المصدر: INMATEH - Agricultural Engineering. 2024, Vol. 73 Issue 2, p73-83. 11p.

مصطلحات موضوعية: *NOZZLE testing, *PLANTING, *SYSTEMS design, *NOZZLES, *CROPS

10

Conference

Influence of nozzle diameter on the anisotropy of compressive strength – measured on 3D Printing Concrete designed with Recycled Fine Aggregates

المؤلفون: Muy, Yeakleang, Courard, Luc, Bulteel, David, Remond, Sébastien, Taleb, Maria, El Cheikh, Khadija, Hubert, Julien

المصدر: Proceedings (2024); 4th RILEM International Conference on Concrete and Digital Fabrication, Munich, Germany [DE], 4th to 6th September 2024

مصطلحات موضوعية: 3D printing concrete, nozzle dimension, anisotropy, compressive strength, interlayer, bond strength, Engineering, computing & technology, Civil engineering, Ingénierie, informatique & technologie, Ingénierie civile