U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PubAg

Main content area

You searched for: Keyword "nozzles" Remove constraint Keyword: "nozzles"
Start Over

Search

2,534  Search Results

« Previous | 1 - 20 of 2,534 |
Number of results to display per page

Search Results

1. Spray Coverage and Biological Efficacy of Single, Twin Symmetrical, and Twin Asymmetrical Flat Fan Nozzles

Author:
Akbar Aliverdi; Masoud Borghei
Source:
Acta technologica agriculturae 2021 v.24 no.2 pp. 92-96
ISSN:
1338-5267
Subject:
fan nozzles,   etc   ; herbicides; spray coverage; spray volume; wild oats;     Show all 5 Subjects
Abstract:
... Proper selection of nozzle type and spray volume is essential to optimize herbicide dose, reducing its adverse environmental effects. It has not been sufficiently evaluated which nozzle type (twin symmetrical flat fan nozzle or the twin asymmetrical one) is more efficient and whether pinoxaden application is more efficient at a low or high spray volume. The spray coverage of a single, twin ...
DOI:
10.2478/ata-2021-0015

2. Study on the Atomization Characteristics of Flat Fan Nozzles for Pesticide Application at Low Pressures

Author:
Shougen Li; Chongchong Chen; Yaxiong Wang; Feng Kang; Wenbin Li
Source:
Agriculture (Basel) 2021 v.11 no.4 pp. -
ISSN:
2077-0472
Subject:
agriculture; atomization; droplet size; droplets; forestry; models; pest control; pesticide application; spray drift
Abstract:
... Spraying is the most widely used means of pesticide application for pest control in agriculture and forestry. The atomization characteristics of the nozzles are directly related to the spray drift, rebound, and deposition. Previous research studies have mainly focused on the change pattern of atomization characteristics. Mathematical descriptions of the atomization characteristics of flat fan ...
DOI:
10.3390/agriculture11040309

3. low-pressure drop size distribution characterization of impact sprinkler jet nozzles with and without aeration

Author:
Qingjiang Xiang; Waqar Ahmed Qureshi; Mazhar Hussain Tunio; Kashif Ali Solangi; Zhengdian Xu; Imran Ali Lakhiar
Source:
Agricultural water management 2021 v.243 pp. 106458
ISSN:
0378-3774
Subject:
aeration; droplet size; droplets; frequency distribution; normal distribution; water flow; water management; wind
Abstract:
... ₅₀ increased with the distance from the sprinkler nozzle but decreased with an increase in the working pressure. Similarly, droplet frequency distribution at a diameter < 3.5 mm of both sprinklers increased with the working pressure. The quantity of larger droplets decreased with an increase in working pressure, and this trend amplified with an increase in the distance from the sprinkler nozzle. Under low ...
DOI:
10.1016/j.agwat.2020.106458

4. Visualisation of the evolution of perforations in oil-based emulsion sheets formed by flat-fan spray nozzles

Author:
Chen Gong; Dongyang Li; Can Kang; Yuli Wang
Source:
Biosystems engineering 2021 v.207 pp. 68-80
ISSN:
1537-5110
Subject:
atomization; emulsions; evolution; ligaments; liquids; surface tension
Abstract:
... Oil-based emulsions are been widely used to apply agricultural sprays and they are often delivered through flat-fan spray nozzles mounted on booms. Perforations are one of the typical structures of found during the atomisation of oil-based emulsions, and they are investigated here using visualisation. The generation, development and coalescence of perforations in an expanding liquid sheet ...
DOI:
10.1016/j.biosystemseng.2021.04.005

5. Influence of Atomization Nozzles and Spraying Intervals on Growth, Biomass Yield, and Nutrient Uptake of Butter-Head Lettuce under Aeroponics System

Author:
Mazhar H. Tunio; Jianmin Gao; Imran A. Lakhiar; Kashif A. Solangi; Waqar A. Qureshi; Sher A. Shaikh; Jiedong Chen
Source:
Agronomy 2021 v.11 no.1 pp. -
ISSN:
2073-4395
Subject:
nozzles,   etc   ; Lactuca sativa var. capitata; aeroponics; agronomy; atomization; biomass production; electrical conductivity; hydrogen; lateral roots; magnesium; nutrient solutions; nutrient uptake; pH; phosphorus; potassium; research; root growth; root shoot ratio; shoots; spraying; ultrasonics;     Show all 21 Subjects
Abstract:
... The atomized nutrient solution droplet sizes and spraying intervals can impact the chemical properties of the nutrient solution, biomass yield, root-to-shoot ratio and nutrient uptake of aeroponically cultivated plants. In this study, four different nozzles having droplet sizes N1 = 11.24, N2 = 26.35, N3 = 17.38 and N4 = 4.89 µm were selected and misted at three nutrient solution spraying ...
DOI:
10.3390/agronomy11010097

6. Analysis of polyacrylonitrile nanofiber yarn formation in electrospinning by using a conical collector and two oppositely charged nozzles

Author:
Beyza Buzol Mülayim; Fatma Göktepe
Source:
The journal of the Textile Institute 2021 v.112 no.3 pp. 494-504
ISSN:
1754-2340
Subject:
cameras; electric field; nanofibers; polyacrylonitrile
Abstract:
... system using polyacrylonitrile polymer is established and yarn formation by polymers ejected from two nozzles with opposite charges was analysed and potential of this system for bicomponent yarn production was shown. Fiber formation from each nozzle was also examined by high speed camera while distribution of the electric field strength and loads in the electrostatic state was analysed by electric ...
DOI:
10.1080/00405000.2020.1768772

7. Wind tunnel investigation of the ability of drift-reducing nozzles to provide mitigation measures for bystander exposure to pesticides

Author:
M. Clare Butler Ellis; Andrew G. Lane; Christine M. O'Sullivan; Steven Jones
Source:
Biosystems engineering 2021 v.202 pp. 152-164
ISSN:
1537-5110
Subject:
exposure assessment; liquids; pesticides; spray drift; surface water; wind tunnels; Netherlands
Abstract:
... that the drift-reduction measurement methods used to define the exposure of surface water might not be relevant to bystanders. Airborne spray is an important component in bystander exposure. Two wind tunnel experiments were undertaken to evaluate whether reductions in airborne spray are as great as the reductions in measured spray drift that occur using protocols designed to classify nozzles for protecting ...
DOI:
10.1016/j.biosystemseng.2020.12.008

8. Investigation of SARS-CoV-2 virus on nozzle surfaces of fuel supply stations in North West of Iran

Author:
Chiman Karami; Ali Normohammadi; Abdollah Dargahi; Mehdi Vosoughi; Hamed Zandian; Farhad Jeddi; S. Ahamad Mokhtari; Eslam Moradi-Asl
Source:
Science of the total environment 2021 v.780 pp. 146641
ISSN:
0048-9697
Subject:
nozzles,   etc   ; COVID-19 infection; Severe acute respiratory syndrome coronavirus 2; fuels; health behavior; pandemic; pumps; virus transmission; Iran;     Show all 9 Subjects
Abstract:
... There are several ways for transmitting the SARS-CoV-2 virus to humans, and one of these ways is the contact with infected surfaces. Fuel stations have been a major concern for people and health experts due to the frequent use of common nozzles. This study was performed to identify the COVID-19 virus in the nozzles of fuel supply stations. In the current research, 25 fuel supply stations along ...
DOI:
10.1016/j.scitotenv.2021.146641

9. Average Degree of Coverage and Coverage Unevenness Coefficient as Parameters for Spraying Quality Assessment

Author:
Beata Cieniawska; Katarzyna Pentos
Source:
Agriculture (Basel) 2021 v.11 no.2 pp. -
ISSN:
2077-0472
Subject:
agriculture; diameter; droplet size; height; liquids; pressure; research; spray coverage; travel; volume
Abstract:
... The purpose of the research was to determine the influence of selected factors on the average degree of coverage and uniformity of liquid spray coverage using selected single and dual flat fan nozzles. The impact of nozzle type, spray pressure, driving speed, and spray angle on the average degree of coverage and coverage unevenness coefficient were studied. The research was conducted with special ...
DOI:
10.3390/agriculture11020151

10. Influence of holdup on gas and particle flow patterns in a spiral jet mill

Author:
L. Scott; A. Borissova; A. Burns; M. Ghadiri
Source:
Powder technology 2021 v.377 pp. 233-243
ISSN:
0032-5910
Subject:
nozzles,   etc   ; depth; design; energy; flow; grinding; momentum; particle size; particles; research; velocity;     Show all 11 Subjects
Abstract:
... . The energy dissipation through particle collisions occurs mainly along the bed surface and in front of the grinding jet nozzles. ...
DOI:
10.1016/j.powtec.2020.08.099

11. Operation parameters optimization of a separating system for non-ferrous metal scraps from end-of-life vehicles based on coupled simulation

Author:
Yifeng Li; Xunpeng Qin; Zhenyuan Zhang; Huanyu Dong
Source:
Waste management 2021 v.120 pp. 667-674
ISSN:
0956-053X
Subject:
nozzles,   etc   ; atmospheric pressure; finite element analysis; simulation models; waste management;     Show all 5 Subjects
Abstract:
... End-of-life vehicles (ELVs) provide a particularly potent source of non-ferrous metal scraps. At presents, conveyor belt and air-jet nozzle are widely used in the existing separation system for non-ferrous metal scraps. Parameters such as shape of the scraps, conveyor belt speed (v), nozzle air pressure (P) and nozzle angle (α) have a significant influences on the separating accuracy ...
DOI:
10.1016/j.wasman.2020.10.032

12. Experimental investigation on thermal management of a photovoltaic module using water-jet impingement cooling

Author:
Mohammad Javidan; Ali Jabari Moghadam
Source:
Energy conversion and management 2021 v.228 pp. 113686
ISSN:
0196-8904
Subject:
nozzles,   etc   ; administrative management; cooling; design; diameter; electric power; energy conversion; liquids; mass flow; response surface methodology; solar collectors; spatial distribution; surface temperature; water;     Show all 14 Subjects
Abstract:
... Cooling of photovoltaic (PV) modules is investigated indoors using a multi-nozzle jet impingement cooling (JIC) system with water as the coolant. The focus is to develop extensive study on the effects of the number of nozzles, their sizes (diameter), and the dimensionless nozzle-to-PV spacing on the overall performance of the JIC system. Temperature uniformity index, a distinctive key parameter ...
DOI:
10.1016/j.enconman.2020.113686

13. Estimation of film antitranspirant spray coverage on rapeseed (Brassica napus L.) leaves using titanium dioxide

Author:
Jie Xiang; Martin Hare; Laura Vickers; Peter Kettlewell
Source:
Crop protection 2021 v.142 pp. 105531
ISSN:
0261-2194
Subject:
fan nozzles,   etc   ; Brassica napus; antitranspirants; canopy; dose response; droplet size; droplets; drought; image analysis; opacity; plant protection; rapeseed; spray coverage; spray deposition; titanium dioxide;     Show all 15 Subjects
Abstract:
... fan nozzles were assessed using a droplet analyzer and coverage was measured using image analysis of deposition on water sensitive paper (WSP) and oilseed rape leaves. There was no significant difference observed with TiO₂ added to film AT and water in droplet size spectra. Spray coverage averaged 46.8% and 57.3% respectively when WSP were positioned at 70 cm and 50 cm below nozzles. Adding TiO ...
DOI:
10.1016/j.cropro.2021.105531

14. Numerical investigation into effects of ejector geometry and operating conditions on hydrogen recirculation ratio in 80 kW PEM fuel cell system

Author:
Jenn-Kun Kuo; Chun-Yao Hsieh
Source:
Energy 2021 v.233 pp. 121100
ISSN:
0360-5442
Subject:
nozzles,   etc   ; anodes; energy; fuel cells; geometry; hydrogen; mass flow; models; stoichiometry; temperature;     Show all 10 Subjects
Abstract:
... temperature. For a hydrogen stoichiometric ratio of 1.5, the optimal value of the mixing chamber diameter (D2) to nozzle throat diameter (Dt) is found to be D2/Dt = 2.2. ...
DOI:
10.1016/j.energy.2021.121100

15. Development of ultrasound-assisted mixture extraction and online extraction solution concentration coupled with countercurrent chromatography for the preparation of pure phytochemicals from Phellinus vaninii

Author:
Yuchi Zhang; Ruoyao Liu; Chunming Liu; Sainan Li; Rong Tsao
Source:
Journal of chromatography 2021 v.1171 pp. 122619
ISSN:
1570-0232
Subject:
nozzles,   etc   ; Phellinus; air; automation; chemical species; countercurrent chromatography; phytochemicals; solvents; ultrasonic treatment;     Show all 9 Subjects
Abstract:
... and solution separation chambers. It provides higher extraction efficiency and fewer impurities and is suitable for processing various sample matrices. The OESC device comprises a spray nozzle, concentrating cylinder, and hot-blast air nozzle. The mechanical parameters for UAME and OESC were optimized, and the operation of online UAME and OESC coupled with PCCC was described. Raw plant materials were ...
DOI:
10.1016/j.jchromb.2021.122619

16. The effect of adjuvants on spray droplet size from hydraulic nozzles

Author:
Rick Sijs; Daniel Bonn
Source:
Pest management science 2020 v.76 no.10 pp. 3487-3494
ISSN:
1526-498X
Subject:
nozzles,   etc   ; adjuvants; air; droplet size; droplets; pest management; prediction; spraying; surface tension; surfactants;     Show all 10 Subjects
Abstract:
... BACKGROUND: When spraying simple liquids through a hydraulic nozzle, the mechanisms that affect breakup into droplets have recently been described. However, it is unknown how the droplet size distribution changes when surfactant‐based adjuvants are added to the spray. RESULTS: When spraying different surfactant‐based solutions containing commercial adjuvants, the breakup of the different liquids ...
DOI:
10.1002/ps.5742

17. Effect of swirling gas nozzles on gas-solid flow patterns inside a novel multi-regime riser

Author:
Shengsheng Wang; Ming Cheng; Xiaolin Zhu; Cunhao Lin; Guowei Wang; Xinping Zhen; Lingyan Tian; Chunyi Li
Source:
Powder technology 2020 v.367 pp. 233-242
ISSN:
0032-5910
Subject:
nozzles,   etc   ; catalysts; gases;     Show all 3 Subjects
Abstract:
... The multi-regime CFB riser equipped with a bottom diameter-enlarged section has been demonstrated to be efficient in increasing the overall solids holdup and enhancing the gas-solid contact previously. In this work, the swirling gas nozzles have been incorporated into the diameter-enlarged section to further improve the gas-solid mixing behavior, and the effect of the nozzle directions on the gas ...
DOI:
10.1016/j.powtec.2020.03.048

18. Influence of Rectifier Nozzles on the Flow Distribution Characteristics of Parallel Pipes

Author:
Zhendong Yang; Yalong Cao; Qiaoling Zhang; Feng Wu; Suqi Shi; Simao Zhao; Hui Zhan
Source:
Water 2020 v.12 no.9 pp. -
ISSN:
2073-4441
Subject:
mathematical models; temperature; water
Abstract:
... The inhomogeneous distribution of parallel pipe flow leads to difficulty in the efficient and reliable operation of fluid power equipment. In view of this, a new type of rectifier nozzle has been proposed in parallel pipelines. Numerical simulation and experimental studies were used to reveal the influence of the rectification nozzle on the flow distribution characteristics. The hydraulic ...
DOI:
10.3390/w12092558

19. Nonpremixed Flameless Combustion in a Furnace: Influence of Burner Configuration

Author:
Guochang Wang; Kin-Pang Cheong; Jicang Si; Jianchun Mi
Source:
Energy & fuels 2021 v.35 no.4 pp. 3333-3347
ISSN:
1520-5029
Subject:
combustion; energy; furnaces; oxidants; propane; temperature
Abstract:
... This study investigates the influence of burner configuration on nonpremixed flameless combustion (FLC) of propane in a cylindrical furnace. Two nozzle patterns are adopted, i.e., a central fuel/oxidizer nozzle symmetrically with two oxidizer/fuel nozzles aside (OFO/FOF), whereas six values of the fuel-oxidizer nozzle separation S (1.1–14Dₑq, where Dₑq is the equivalent jet diameter ...
DOI:
10.1021/acs.energyfuels.0c03503

20. Study on spray dust removal law for cleaner production at fully mechanized mining face with large mining height

Author:
Yao Xie; Weimin Cheng; Haiming Yu; Yuhuan Wang
Source:
Powder technology 2021 v.389 pp. 48-62
ISSN:
0032-5910
Subject:
atomization; butterflies; coal; dust; face; models
Abstract:
... Aiming at the problem that it is difficult to control high dust hazard in fully mechanized mining face with large mining height, an airflow-droplet coupled model was established based on the Euler-Lagrange method. Through a custom-developed nozzles atomization experimental system, main parameters were measured, and the built-in butterfly division core nozzle with an aperture of 1.6 mm ...
DOI:
10.1016/j.powtec.2021.04.095