Flame temperature measurement of microwave-assisted aluminum particle combustion

2019 ◽  
Author(s):  
Keke Zhu ◽  
Stuart J. Barkley ◽  
Travis R. Sippel ◽  
James B. Michael
Keyword(s):  
Temperature Measurement ◽  
Aluminum Particle ◽  
Flame Temperature ◽  
Particle Combustion ◽  
Microwave Assisted

Analysis of aluminum particle combustion in a downward burning solid rocket propellant

Fuel ◽  
2019 ◽  
Vol 237 ◽  
pp. 405-412 ◽  
Author(s):  
Castillo Griego ◽  
Nadir Yilmaz ◽  
Alpaslan Atmanli
Keyword(s):  
Aluminum Particle ◽  
Solid Rocket Propellant ◽  
Rocket Propellant ◽  
Particle Combustion ◽  
Solid Rocket

Simulation of Char Dust Combustion Inside a Pyroscrubber Downstream of a Petroleum Coke Calcining Kiln

2010 ◽  
Author(s):  
Lei Zhao ◽  
Ting Wang
Keyword(s):  
Energy Saving ◽  
Petroleum Coke ◽  
Gas Flow ◽  
Flame Temperature ◽  
Combustion Efficiency ◽  
Energy Output ◽  
Combustion Model ◽  
Phase Flow ◽  
Two Phase ◽  
Particle Combustion

A pyroscrubber is a furnace used in the petroleum coke calcining industry to recover energy from the carbonaceous contents, including char dust and hydrocarbon volatiles of the exhaust gas from the calcination kiln. The combusted hot gases are used to generate steam and produce electricity, so it is important to optimize the pyroscrubber performance to produce high-grade combusted gases to generate steam but with minimal emissions. A previous study employed the locally-homogeneous flow (LHF) model to study rhe means to improve combustion efficiency and reduce emissions. In the LHF model, the inter-phase exchange rates of mass, momentum and energy are assumed to be infinitely fast, so the dispersed phase (char dust) can be simplified as the gas phase, and the complex two-phase flow is then treated as a single-phase flow. In this study, LHF model is replaced with a solid particle combustion model by incorporating both finite-rate heterogeneous and homogeneous combustion processes. Results reveal that the particle combustion model generates much higher local flame temperature (2200K) than in LHF model (1800K). All char particles are burned before or in the high-bay area. Total energy output of the case with particle combustion model is 92% of the LHF model. Furthermore, motivated by the potential energy saving from removing the air blower power supply, this study further investigates the possible benefit of running the pyroscrubber with the ventilation doors open. Three cases with different combinations of air injections and door opening have been studied. Results show that the gas flow is stably stratified with a large amount of the entrained cold air moving at the bottom of the chamber and the hot combusted gas moving through the top. With bottom doors completely open, sufficient air can be drawn into the pyroscrubber without the need of blowing air in, but the combustion gases will be overcooled making this practice unfavorable from the energy saving point of view.

Soft Sensor for Flame Temperature Measurement and IoT based Monitoring in Power Plants

2018 ◽  
Vol 5 (4) ◽  
pp. 10755-10762 ◽  
Author(s):  
K. Sujatha ◽  
Nallamilli.P.G Bhavani ◽  
Su-Qun Cao ◽  
K.S. Ram Kumar
Keyword(s):  
Temperature Measurement ◽  
Power Plants ◽  
Flame Temperature ◽  
Soft Sensor

Comparison of Conventional and Microwave Heating for Evaluation of Microwave Effects

2016 ◽  
Vol 69 (8) ◽  
pp. 865 ◽  
Author(s):  
Péter Bana ◽  
István Greiner
Keyword(s):  
Temperature Measurement ◽  
Microwave Heating ◽  
Organic Synthesis ◽  
Convenient Method ◽  
Thermal Effects ◽  
Fibre Optic ◽  
Organic Transformations ◽  
Microwave Assisted ◽  
Microwave Reactor ◽  
Microwave Effects

In microwave-assisted organic synthesis, the question of microwave effects is still debated. Proper examination of these hypothesized phenomena is encumbered by some specific features of microwave heating. We devise a convenient method to eliminate most of the irreproducibility observed in microwave-heated organic transformations by thermal conditioning of the microwave reactor cavity. To show the utility of this approach, we investigated a reaction of 2-chloropyridine, in which microwave conditions were shown to be beneficial by previous studies. Using our method to ensure proper reproducibility together with fibre optic temperature measurement, the observed differences were traced back to large hidden thermal differences, while non-thermal effects could not be detected in the comparison experiments.

Numerical Simulation of Single Aluminum Particle Combustion (Review)

2005 ◽  
Vol 41 (6) ◽  
pp. 622-638 ◽  
Author(s):  
M. W. Beckstead ◽  
Y. Liang ◽  
K. V. Pudduppakkam
Keyword(s):  
Numerical Simulation ◽  
Aluminum Particle ◽  
Particle Combustion

Gas-surface thermochemistry and kinetics for aluminum particle combustion

2015 ◽  
Vol 35 (2) ◽  
pp. 2439-2446 ◽  
Author(s):  
Julien Glorian ◽  
Laurent Catoire ◽  
Stany Gallier ◽  
Nathalie Cesco
Keyword(s):  
Aluminum Particle ◽  
Particle Combustion
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