Numerical and Experimental Analysis on Spray Characteristics of Biodiesel ( WCO ) using Pressure swirl atomizer

2021 ◽  
Author(s):  
Prem Shanker Yadav ◽  
Raghvendra Gautam
Keyword(s):  
Experimental Analysis ◽  
Spray Characteristics ◽  
Swirl Atomizer ◽  
Pressure Swirl ◽  
Pressure Swirl Atomizer

Experimental Investigations of Spray Characteristics of a Pressure-Swirl Atomizer

2019 ◽  
Vol 234 (5) ◽  
pp. 643-654 ◽  
Author(s):  
Xiongjie Fan ◽  
Cunxi Liu ◽  
Yong Mu ◽  
Haitao Lu ◽  
Jinhu Yang ◽  
...  
Keyword(s):  
Surface Wave ◽  
Liquid Film ◽  
Fuel Temperature ◽  
Spray Characteristics ◽  
Spray Cone ◽  
Breakup Length ◽  
Swirl Atomizer ◽  
Pressure Swirl ◽  
The Impact ◽  
Pressure Swirl Atomizer

Spray characteristics of a pressure-swirl atomizer are investigated using high-speed shadowgraph technique under different pressure drops (Δ P) and fuel temperatures ( T). An image processing method is developed using MATLAB. The results illustrate that the mass flow rate climbs with the increase of Δ P, while the discharge coefficient ( Cd) decreases firstly and then climbs with the increase of Δ P. Δ P has larger effect on the cone angle relative to fuel temperature. With the increase of Δ P, the shape of liquid film changes from ‘onion’ to ‘tulip’ and finally be fully developed spray cone. Meanwhile, the surface of liquid film becomes smoother with the increase of Δ P. The average breakup length climbs, then decreases to nearly a constant value with the increase of Δ P, which is induced by the “Impact wave,” surface wave, and turbulent energy. There are little differences on the shape of the liquid film under different temperatures, and temperature has different influence on breakup length under different Δ P. Both the fuel temperature and Δ P have significant impact on the surface wavelength ( λ) and velocities ( U, V) of surface wave. The width of fuel stream becomes larger with the increase of Δ P and fuel temperature. The results can further deepen the understanding of spray characteristics of pressure-swirl atomizer.

Experimental Studies on Fuel Spray Characteristics of Pressure-Swirl Atomizer and Air-Blast Atomizer

2021 ◽  
Vol 30 (2) ◽  
pp. 729-741
Author(s):  
Kaixing Wang ◽  
Xiongjie Fan ◽  
Fuqiang Liu ◽  
Cunxi Liu ◽  
Haitao Lu ◽  
...  
Keyword(s):  
Experimental Studies ◽  
Fuel Spray ◽  
Spray Characteristics ◽  
Air Blast ◽  
Swirl Atomizer ◽  
Pressure Swirl ◽  
Pressure Swirl Atomizer

scholarly journals Experimental and Analytical Investigation on the Variation of Spray Characteristics Along Radial Distance Downstream of a Pressure Swirl Atomizer

1986 ◽  
Vol 108 (3) ◽  
pp. 473-478 ◽  
Author(s):  
Y. H. Zhao ◽  
W. M. Li ◽  
J. S. Chin
Keyword(s):  
Drop Size ◽  
Laser Light ◽  
Radial Distance ◽  
Analytical Investigation ◽  
Laser Light Scattering ◽  
Sauter Mean Diameter ◽  
Spray Characteristics ◽  
Swirl Atomizer ◽  
Pressure Swirl ◽  
Pressure Swirl Atomizer

The variation of spray characteristics (Sauter Mean Diameter and Rosin-Rammler drop-size distribution parameter) downstream of a pressure swirl atomizer along radial distance has been measured by laser light scattering technology. An analytical model has been developed that is capable of predicting the variation of spray characteristics along radial distance. A comparison between the prediction and experimental data shows excellent agreement. It shows that the spray model proposed, although relatively simple, is correct and can be used with some expansion and modification to predict more complicated spray systems.

Influence of Ambient Air Pressure on Pressure-Swirl Atomizer Spray Characteristics

2001 ◽  
Author(s):  
Arvind K. Jasuja ◽  
Arthur H. Lefebvre
Keyword(s):  
Gas Turbines ◽  
Drop Size ◽  
Cone Angle ◽  
Ambient Air ◽  
Air Pressure ◽  
Spray Characteristics ◽  
Spray Cone ◽  
Swirl Atomizer ◽  
Pressure Swirl ◽  
Pressure Swirl Atomizer

A single-component PDPA is used to evaluate the spray characteristics of a simplex pressure-swirl atomizer when operating at high liquid flow rates and elevated ambient air pressures. Attention is focused on the effects of air pressure on mean drop size, drop-size distribution, mean velocity, volume flux, and number density. Using a constant flow rate of 75 g/s, measurements are carried out along the spray radii at a fixed distance downstream from the atomizer face of 50 mm. The air pressures of 1, 8, and 12 bars chosen for these tests correspond to air densities of 1.2, 9.6, and 14.4 kg/m3. The purpose of the investigation is to supplement the existing body of information on pressure-swirl spray characteristics, most of which were obtained at normal atmospheric ambient pressures, with new data that correspond more closely to the conditions prevailing in the primary combustion zones of modern gas turbines. The results obtained are explained mainly in terms of the influence of air pressure on spray structure, in particular spray cone angle and Weber number.

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