OPTICAL PATTERNATION OF A MULTI-ORIFICE SPRAY NOZZLE

2005 ◽  
Vol 15 (6) ◽  
pp. 687-698 ◽  
Author(s):  
Jongmook Lim ◽  
Yudaya R. Sivathanu
Keyword(s):  
Spray Nozzle

Metrological aspects of pre-flight anti-icing procedures for civil aircraft

2019 ◽  
pp. 22-26
Author(s):  
А. Богоявленский ◽  
A. Bogoyavlenskiy
Keyword(s):  
Negative Impact ◽  
Landing Gear ◽  
Flight Performance ◽  
Spray Nozzle ◽  
Subsequent Formation ◽  
Inlet Guide Vanes ◽  
Civil Aircraft ◽  
Engine Compressor ◽  
Temperature And Pressure ◽  
Instrumental Control

Snow-ice deposits formed on the outer surfaces of aircrafts on the ground during parking can have a negative impact during take-off due to the deterioration of aerodynamic and flight performance, a significant and even critical decrease in lift, increased drag, blocking controls, difficulty or blocking of landing gear retraction, damage to the blades of inlet guide vanes and/or the blades of an engine compressor. To exclude the influence of snow and ice deposits, anti-icing treatment is performed, including their removal and/or protection from subsequent formation. For this purpose, special anti-icing machines (deicers), equipped with such means of instrumental control as counters of anti-icing fluid pumps, measuring scales of anti-icing fluid tanks, thermometers and pressure gauges for temperature and pressure measuring at the outlet of a spray nozzle, are used. The article deals with the metrological aspects of civil aircrafts anti-icing prior to flight.

Spray Nozzle Performance in Cleaning Food Equipment

1981 ◽  
Vol 24 (2) ◽  
pp. 0526-0532 ◽  
Author(s):  
James M. Scott ◽  
David G. Dunsmore ◽  
Mark D. Keegan
Keyword(s):  
Spray Nozzle

Part 2: Design Optimisation Strategies for a Fuel Spray Nozzle

2021 ◽  
Author(s):  
Thomas Andreou ◽  
Craig White ◽  
Konstantinos Kontis ◽  
Shahrokh Shahpar ◽  
Nicholas Brown
Keyword(s):  
Fuel Spray ◽  
Spray Nozzle ◽  
Design Optimisation

Influence of spray nozzle aperture during high shear wet granulation on granule properties and its compression attributes

2018 ◽  
Vol 553 (1-2) ◽  
pp. 474-482 ◽  
Author(s):  
Natalia Veronica ◽  
Hui Ping Goh ◽  
Christina Yong Xin Kang ◽  
Celine Valeria Liew ◽  
Paul Wan Sia Heng
Keyword(s):  
Wet Granulation ◽  
High Shear ◽  
Spray Nozzle ◽  
High Shear Wet Granulation ◽  
Granule Properties

scholarly journals Influence of working pressure and spray nozzle on the distribution of spray liquid in manual backpack sprayers

2019 ◽  
Vol 86 ◽  
Author(s):  
Alcides Marangoni Junior ◽  
Marcelo da Costa Ferreira
Keyword(s):  
Coefficient Of Variation ◽  
Spray Nozzle ◽  
Hollow Cone ◽  
Distribution Profile ◽  
Working Pressure ◽  
Spray Solution ◽  
Phytosanitary Treatment ◽  
Spray Distribution ◽  
Distribution Uniformity

ABSTRACT Manual backpack sprayers are widely used in rural properties in Brazil. However, studies that assess their working characteristics, especially spray tip models and working pressure conditions, are scarce. Thus, the aim of this study was to assess how much the working pressure and spray tips influence the distribution quality of phytosanitary spray solutions in manual backpack sprayers. Four spray nozzles (standard flat-fan Magnojet TP11002, turbo flat-fan TeeJet TT11002, hollow-cone TeeJet TXA8002, and disc-core) were assessed in a patternator table at 1, 2, 3, and 4 bar. Analyses of spray distribution profile were performed by symmetry and the coefficient of variation (CV) analysed by the Tukey’s test (p < 0.05). Spray tip models and working pressure influenced in more than 100% the distribution uniformity values of spray solution and in about 50% the useful range of the phytosanitary treatment. Among the models assessed in this study, the turbo flat-fan spray nozzle presents the best set of characteristics to be indicated for manual backpack sprayers aiming at field phytosanitary treatments.

scholarly journals Effect of spray drying process parameters on Uncaria tomentosa (Willd. ex Schult.) DC. dried extracts

Revista Fitos ◽  
2020 ◽  
Vol 14 (4) ◽  
pp. 469-475
Author(s):  
Lucas Oliveira Rodrigues ◽  
Rachel Andrade de Faria ◽  
Marcos Martins Gouvêa ◽  
Carlos Augusto de Freitas Peregrino ◽  
Elizabeth Valverde Macedo ◽  
...  
Keyword(s):  
Spray Drying ◽  
Process Parameters ◽  
Inlet Temperature ◽  
Airflow Rate ◽  
Spray Nozzle ◽  
Drying Process ◽  
Process Yield ◽  
Uncaria Tomentosa ◽  
Acacia Gum ◽  
Higher Temperature

Uncaria tomentosa (Willd. ex Schult.) DC. (Cat's claw) is a plant member of the Rubiaceae family, from the Amazon region, and used in traditional medicine as raw material for phytomedicines indicated for arthritis and osteoarthritis. This study aimed to evaluate the spray drying process parameters on the properties of different extracts obtained from Uncaria tomentosa. A reduced 24-1 multifactorial design was applied to evaluate the importance of the equipment variables (pump speed, spray nozzle diameter, air inlet temperature, and atomization airflow rate) in the process. Maltodextrin and acacia gum were used as carriers in a 1:1 (m/m) ratio, considering the solid residue content of the liquid plant extract. Process yield, moisture, and hygroscopicity were evaluated as dependent variables. Higher atomization airflow rate led to higher process yield for powdered dried extracts with maltodextrin. Higher temperature led to lower moisture contents regarding powdered dried extracts with acacia gum. No variable, for any carrier, was considered significant for hygroscopicity. The best spray drying configuration for the desired characteristics (i.e. lower hygroscopicity and moisture) used the larger spray nozzle with a diameter of 1.2 mm and the higher temperature of 150 °C, with both carriers.

Parametric Redesign of a Convergent-Divergent Cold Spray Nozzle

2021 ◽  
Author(s):  
Florentina-Luiza Zavalan ◽  
Aldo Rona
Keyword(s):  
Cold Spray ◽  
Gas Flow ◽  
High Hardness ◽  
Cold Spraying ◽  
Spray Nozzle ◽  
Industry Standard ◽  
Particle Velocities ◽  
Radial Spread ◽  
Cold Metal ◽  
Carrier Gas Flow

Abstract The generation of a high velocity carrier gas flow for cold metal particle applications is addressed; with specific focus on titanium cold spraying. The high hardness of this material makes cold spraying titanium difficult to achieve by industry standard nozzles. The redesign of a commercial conical convergent-divergent cold spray nozzle is achieved by the application of aerospace design codes; based on the Method of Characteristics; towards producing a more isentropic expansion by contouring the nozzle walls. Steady threedimensional RANS SST k-ω simulations of nitrogen are coupled two-way to particle parcel tracking in the Lagrangian frame of reference. The new contoured nozzle is found to produce higher particle velocities with greater radial spread; when operated at the same conditions/cost of operation as the commercial nozzle. These numerical results have shown the potential for extending cold spray to high density and low ductility particles by relatively minor rig modifications; through an effective synergy between gas dynamics and material science.

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