scholarly journals The effects of additives on the combustion characteristics of aluminum powder in steam

RSC Advances ◽  
2017 ◽  
Vol 7 (10) ◽  
pp. 5725-5732 ◽  
Author(s):  
Baozhong Zhu ◽  
Fan Li ◽  
Yunlan Sun ◽  
Qichang Wang ◽  
Yuxin Wu ◽  
...  
Keyword(s):  
Ammonium Perchlorate ◽  
Aluminum Powder ◽  
Combustion Process ◽  
Combustion Characteristics ◽  
Ignition And Combustion ◽  
Different Levels

To develop the combustion characteristics of aluminum powder in steam, the ignition and combustion process of aluminum powder with different additives (KBH4, ammonium perchlorate (AP) and NaCl) addition at different levels were studied using a transparent pipe furnace.

EFFECT OF METALLIC FUEL NATURE ON COMBUSTION CHARACTERISTICS OF AMMONIUM PERCHLORATE / BINDER / METAL COMPOSITE SOLID PROPELLANTS

2020 ◽  
Author(s):  
V. A. Poryazov ◽  
◽  
O. G. Glotov ◽  
V. A. Arkhipov ◽  
G. S. Surodin ◽  
...  
Keyword(s):  
Ammonium Perchlorate ◽  
Combustion Process ◽  
Experimental Information ◽  
Combustion Characteristics ◽  
Transformer Oil ◽  
Metal Composite ◽  
Butadiene Rubber ◽  
Solid Propellants ◽  
Metallic Fuel ◽  
Composite Solid Propellants

The goal of this research is to obtain experimental information about combustion characteristics of the composite propellant containing various metallic fuels. The propellant formulations contained two fractions of ammonium perchlorate (64.6%), inert binder (19.7%) - butadiene rubber SKD plastized with transformer oil, and metal fuel (15.7% of aluminum ASD-4, ASD-6, Alex; boron; aluminum diboride; aluminum dodecaboride; some mixtures of above listed ingredients). Experimental information will be used further as a background to develop the physical and mathematical model of combustion process.

Experimental Study of Ignition and Combustion Characteristics of Mixed Rice Straw and Sewage Sludge Solid and Hollow Spherical Pellets in a Plasma Combustion System

2019 ◽  
Vol 797 ◽  
pp. 327-335 ◽  
Author(s):  
Mohamed E. Mostafa ◽  
Hao Tang ◽  
Jun Xu ◽  
Huan Ying Chi ◽  
Kai Xu ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Rice Straw ◽  
High Speed ◽  
High Surface ◽  
Combustion Process ◽  
Combustion Characteristics ◽  
Combustion System ◽  
Large Area ◽  
Char Combustion ◽  
Ignition And Combustion

In this work, the ignition and combustion characteristics of mixed rice straw and sewage sludge pellets in air atmosphere were investigated using a plasma combustion system. One common pellet shape (solid spherical pellet) and another new shape (hollow spherical) are used in this study. High-speed camera was used to record and observe ignition and combustion process of pellets. In case of hollow pellets, the shape and distribution of flame are found to be better compared to solid pellets. Also, it is clear that the values of volatile combustion times in case of hollow pellets are low compared to solid pellets. The overall heat transfer enhanced in case of hollow pellet due to the large area subjected to hot gases and the high surface to volume ratio. Hollow pellet consumed less time for internal ignition and volatiles char combustion compared to solid pellet. Volatiles and char combustion lasted for 63.05 and 61 s, respectively for hollow pellet while these values were found to be 72.8 and 83 s, respectively for solid pellet.

Rheological Properties and Ignition and Combustion Characteristics of Biochar–Algae–Water Slurry Fuels

2018 ◽  
Vol 140 (6) ◽  
Author(s):  
Mingming Zhu ◽  
Zhezi Zhang ◽  
Pengfei Liu ◽  
Dongke Zhang
Keyword(s):  
Rheological Properties ◽  
Flow Behavior ◽  
Combustion Process ◽  
Ccd Camera ◽  
Combustion Characteristics ◽  
Water Evaporation ◽  
Solid Loading ◽  
Single Droplet ◽  
Experimental Conditions ◽  
Ignition And Combustion

This study examined the rheological properties, ignition, and combustion characteristics of biochar–algae–water (BAW) slurry fuels. A pine sawdust biochar with a median particle size (D50) of approximately 12 μm and algae Chlorella vulgaris in dry powder form with D50 of approximately 19 μm were used. The BAW slurries with a constant solid loading of 40 wt % and algae/biochar ratio varying from 0 to 0.2 by weight were prepared. The apparent viscosity was measured using a Haake VT550 cone-and-plate viscometer. The stability of the slurries was characterized using a “drop rod” method. Ignition and combustion characteristics of the slurries were studied using a suspended single-droplet technique. A single droplet of a slurry fuel with a diameter ranging from 0.5 mm to 1.5 mm was suspended on a silicon carbide fibre and burned in air at 1023 K in an electrically heated tube furnace. The ignition and combustion processes of the droplet were recorded using a CCD camera at 200 fps. The ignition delay time, burnout time, and burning rate were determined. The BAW slurries showed shear-thinning flow behavior. The slurries had higher viscosity and greater stability at higher algae proportion in the solid. The ignition and combustion process of BAW slurries followed the sequence of water evaporation, devolatilization, ignition, and combustion of the solid residue. The combustion of the residual solid was diffusion controlled under the experimental conditions and the burning rates of the BAW slurry droplets ranged from 0.15 to 0.25 mm2 s−1.

scholarly journals Effects of Moisture Content on the Minimum Explosible Concentration of Aluminum Powder and the Related Mechanism

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Haiyan Chen ◽  
Qingguo Yao ◽  
Qiqi Liu ◽  
Hao Liu ◽  
Xinyan Zhang
Keyword(s):  
Moisture Content ◽  
Aluminum Powder ◽  
Combustion Process ◽  
Dilution Effect ◽  
Endothermic Effect ◽  
Aluminum Powders ◽  
Factors Affecting ◽  
Ignition And Combustion ◽  
Explosion Test ◽  
Burn Rate

Aluminum powder has been widely applied to various industries. However, its high activity and high burn rate can cause serious explosion risks. Many factors affecting the explosion of aluminum powder have been determined, yet moisture content has not been included. In the present work, the minimum explosible concentrations of aluminum powders with different moisture contents were measured with a 20-liter explosion test apparatus using the explosion accident in Kunshan, China, as a study case. The experimental results suggest that the minimum explosible concentration of aluminum powder dramatically increases with the increase of its moisture content first and the increasing trend becomes slower as the moisture content further increased. The oxidation time has no significant effects on the minimum explosible concentration of aluminum power in 8 hours at room temperature. Further investigation suggests that the moisture lowers the explosion risk of aluminum powder by altering its surface oxide film, ignition, and combustion process. The low contents of moisture in the range of 0%-8% increase the minimum explosible concentration of aluminum powder by inhibiting the reaction kinetics and particle agglomeration, while high contents of moistures in the range of 8%-20% affect the minimum explosible concentration by the endothermic effect and oxygen dilution effect.

Effects of Different Additives on the Ignition and Combustion Characteristics of Micrometer-Sized Aluminum Powder in Steam

2017 ◽  
Vol 31 (8) ◽  
pp. 8674-8684 ◽  
Author(s):  
Baozhong Zhu ◽  
Fan Li ◽  
Yunlan Sun ◽  
Yuxin Wu ◽  
Qichang Wang ◽  
...  
Keyword(s):  
Aluminum Powder ◽  
Combustion Characteristics ◽  
Ignition And Combustion

Effect of Ammonium Perchlorate Coating on the Ignition and Combustion Characteristics of Al/JP-10 Nanofluid Fuel

2019 ◽  
Vol 192 (8) ◽  
pp. 1567-1581 ◽  
Author(s):  
Bing Hong Chen ◽  
Jian Zhong Liu ◽  
Wei Juan Yang ◽  
He Ping Li ◽  
Long Jin Du
Keyword(s):  
Ammonium Perchlorate ◽  
Combustion Characteristics ◽  
Ignition And Combustion ◽  
Nanofluid Fuel

Ignition and Combustion Characteristics of Laser Irradiated Al/CuxO Nanoparticle Pellets and Nanolaminates

2021 ◽  
pp. 1-10
Author(s):  
Florin Saceleanu ◽  
Lauren LeSergent ◽  
Yiqi Zhang ◽  
Victoria Kerr ◽  
John Z. Wen ◽  
...  
Keyword(s):  
Combustion Characteristics ◽  
Ignition And Combustion

scholarly journals Study of Ignition and Combustion Characteristics of Consecutive Injections with iso-Octane and n-Heptane as Fuels

2020 ◽  
Vol 34 (11) ◽  
pp. 14741-14756
Author(s):  
Sensen Xing ◽  
Guanxiong Zhai ◽  
Haijun Mo ◽  
Paul R. Medwell ◽  
Anthony C. Y. Yuen ◽  
...  
Keyword(s):  
Combustion Characteristics ◽  
Ignition And Combustion
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