Effect of structural parameters on atomization characteristics and dust reduction performance of internal-mixing air-assisted atomizer nozzle

2019 ◽  
Vol 128 ◽  
pp. 316-328 ◽  
Author(s):  
Pengfei Wang ◽  
Yijie Shi ◽  
Lianyang Zhang ◽  
Yongjun Li
Keyword(s):  
Structural Parameters ◽  
Internal Mixing ◽  
Atomization Characteristics ◽  
Dust Reduction

scholarly journals Atomization and combustion characteristics of a fuel–water rapid internal mixing injector

2019 ◽  
Author(s):  
Aizam Shahroni Mohd Arshad
Keyword(s):  
Water Content ◽  
Fuel Injection ◽  
Fuel Vapor ◽  
Sauter Mean Diameter ◽  
Liquid Ratio ◽  
Emulsified Fuel ◽  
Content Ratio ◽  
Internal Mixing ◽  
Mean Diameter ◽  
Atomization Characteristics

In this study, we investigated the atomization characteristics of rapid internal mixing injector (RIM injector) developed in our laboratory. RIM injector successfully emulsifies base fuel without any surfactant just before fuel injection. The diameter of droplet discharged from RIM injector was evaluated based on processing of shadowgraph images. It was found that Sauter mean diameter (SMD) of droplet is determined by the gas to liquid ratio (GLR) and viscosity of emulsified fuel. The increasing GLR decreases SMD value. As water content ratio is increased, the inner structure of droplet changes to W/O type emulsion. The emulsification increases its viscosity, which deteriorates the atomization characteristics. We proposed an empirical formula as functions of GLR and Reynolds number reproducing the deterioration resulting from increasing viscosity. The formula successfully predicts the SMD variation with respect to GLR and water content ratio. Finally, we examined the effect of atomization air ratio on NOx and PM emissions. The quantity of atomization air significantly influences the PM emission because the increasing air improves the mixing of fuel vapor with combustion air.

Research on Internal-Mixing Nozzle for the Icing Environment Simulation

2013 ◽  
Vol 275-277 ◽  
pp. 527-531
Author(s):  
Liu Qing Xu ◽  
Hai Li Liu ◽  
Feng Quan Zhang ◽  
Li Li Guo
Keyword(s):  
Flow Field ◽  
Droplet Diameter ◽  
External Flow ◽  
Aviation Industry ◽  
Simulation Accuracy ◽  
Internal Mixing ◽  
Environment Simulation ◽  
Simulation Results ◽  
Atomization Characteristics ◽  
Environment Experiment

As one of the important part in aviation industry, nozzles are widely applied on the icing environment experiment. In this paper, we design and validate a novel internal-mixing nozzle for the icing experiment. To begin with, based on the requirements of experiment, the main structure sizes of nozzle are designed and the nozzle is processed for measuring droplet diameter. And then in order to investigate the atomization characteristics of droplet diameter, we model inner flow field of the nozzle and external flow field. Grids are divided to guarantee the simulation accuracy. Finally, the experiment is simulated by FLUENT software, and the simulation results of inner and external flow field are discussed respectively. The experiment shows that the simulation results of the nozzle are in good agreement with the test results.

Experiment Study and Simulation Research for the Atomization Characteristics of the Internal-Mixing Twin-Fluid Atomizer

2014 ◽  
Vol 1049-1050 ◽  
pp. 1075-1082
Author(s):  
Peng Bo Bai ◽  
Yu Ming Xing ◽  
Ze Wang
Keyword(s):  
Droplet Size ◽  
Three Dimensional ◽  
Operating Conditions ◽  
Air Pressure ◽  
Experimental Result ◽  
Hydraulic Pressure ◽  
Liquid Ratio ◽  
Energy Field ◽  
Internal Mixing ◽  
Atomization Characteristics

The internal-mixing twin-fluid atomizer has found wide application in aerospace, industrial gas turbine, oil-fired boiler, energy field and so on. The atomization characteristics of internal mixing nozzle under different operating conditions are studied by utilizing the Malvern laser particle size analyzer. According to the experiment results, the influence of air pressure, hydraulic pressure and air-liquid ratio to droplet size and uniformity are analyzed. The three-dimensional flow field model of internal mixing nozzle is built to simulate the droplet size of mixing room and outlet by Fluent. The simulation results show that the droplet size decreases along with the increase of the air pressure and the air-liquid ratio, moreover, the air pressure plays a main actor. The droplet size increases in the mixing room, and then decrease sharply at the domain of the outlet. The droplet size of the nozzle’s outlet obtained in simulation matches the experimental result.

Mixing and atomization characteristics in an internal-mixing twin-fluid atomizer

Fuel ◽  
2012 ◽  
Vol 97 ◽  
pp. 306-314 ◽  
Author(s):  
Zhouhang Li ◽  
Yuxin Wu ◽  
Chunrong Cai ◽  
Hai Zhang ◽  
Yingli Gong ◽  
...  
Keyword(s):  
Internal Mixing ◽  
Atomization Characteristics
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