Effect of metal additives on the composition and combustion characteristics of primary combustion products of B-based propellants

2015 ◽  
Vol 122 (1) ◽  
pp. 497-508 ◽  
Author(s):  
Daolun Liang ◽  
Jianzhong Liu ◽  
Jinwu Xiao ◽  
Jianfei Xi ◽  
Yang Wang ◽  
...  
Keyword(s):  
Combustion Products ◽  
Combustion Characteristics ◽  
Metal Additives ◽  
Primary Combustion Products

EFFECT OF BORON ON THE COMBUSTION CHARACTERISTICS OF METALLIZED HIGH-ENERGY MATERIALS

2020 ◽  
Author(s):  
A. Korotkikh ◽  
◽  
I. Sorokin ◽  
◽  
Keyword(s):  
Specific Impulse ◽  
Equilibrium Composition ◽  
Combustion Products ◽  
High Energy ◽  
Combustion Characteristics ◽  
Solid Propellants ◽  
Energy Materials ◽  
High Energy Materials ◽  
Condensed Combustion Products ◽  
Active Fuel Binder

The paper presents the results of thermodynamic calculations of the effect of pure boron additives on combustion characteristics of high-energy materials (HEM) based on ammonium perchlorate, ammonium nitrate, active fuel-binder, and powders of aluminum Al, titanium Ti, magnesium Mg, and boron B. The combustion parameters and the equilibrium composition of condensed combustion products (CCPs) of HEM model compositions were obtained with thermodynamic calculation program “Terra.” The compositions of solid propellants with different ratios of metals (Al/B, Ti/B, Mg/B, and Al/Mg/B) were considered. The combustion temperature Tad in a combustion chamber, the vacuum specific impulse J at the nozzle exit, and the mass fraction ma of the CCPs for HEMs were determined.

Composition of solid and gaseous primary combustion products of boron-based fuel-rich propellant

2021 ◽  
Author(s):  
Peihui Xu ◽  
Jianzhong Liu ◽  
Linqing Zhang ◽  
Jifei Yuan ◽  
Minggang Song ◽  
...  
Keyword(s):  
Combustion Products ◽  
Primary Combustion Products

Factors Affecting the Primary Combustion Products of Boron-Based Fuel-Rich Propellants

2017 ◽  
Vol 33 (2) ◽  
pp. 333-337 ◽  
Author(s):  
Lin-lin Liu ◽  
Guo-Qiang He ◽  
Ying-Hong Wang ◽  
Song-Qi Hu ◽  
Yuan-Min Liu
Keyword(s):  
Combustion Products ◽  
Factors Affecting ◽  
Primary Combustion Products

MESOSCALE EXPERIMENTS HELP TO EVALUATE IN-SITU BURNING OF OIL SPILLS1

1993 ◽  
Vol 1993 (1) ◽  
pp. 755-760
Author(s):  
David D. Evans ◽  
William D. Walton ◽  
Howard R. Baum ◽  
Kathy A. Notarianni ◽  
Edward J. Tennyson ◽  
...  
Keyword(s):  
Crude Oil ◽  
Combustion Products ◽  
Coast Guard ◽  
Effective Diameter ◽  
Smoke Plume ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Particulate Deposition ◽  
Primary Combustion Products

ABSTRACT Burning of spilled oil has distinct advantages over other cleanup countermeasures. It offers the potential to convert rapidly large quantities of oil into its primary combustion products, carbon dioxide and water, with a small percentage of other unburned and residue byproducts. Disadvantages include the dispersal of the combustion products into the air. Mesoscale and laboratory experiments have been conducted to measure the burning characteristics of crude oil fires. Measurements on crude oil pool fires from 0.4 m to 17.2 m in effective diameter were made to obtain data on the rate of burning, heat release rate, composition of the combustion products, and downwind dispersion of the products. The smaller experiments were performed in laboratories at the National Institute of Standards and Technology and the Fire Research Institute in Japan; and the larger ones at the U. S. Coast Guard Fire Safety and Test Detachment in Mobile, Alabama. From these experiments, the value for surface regression rate of a burning crude oil spill was found to be 0.055 mm/s. A major concern for public safety is the content and extent of the smoke plume from the fires. Smoke yield, the fraction of the oil mass burned that is emitted as particulate, was found to be 13 percent. A large-eddy simulation calculation method for smoke plume trajectory and smoke particulate deposition developed by NIST showed that the smoke particulate deposition from a 114 m2 burn would occur in striations over a long, slender area 3.2 km wide and 258 km downwind of the burn.

Composition and characteristics of primary combustion products of boron-based propellants

2017 ◽  
Vol 53 (1) ◽  
pp. 55-64 ◽  
Author(s):  
J. Liu ◽  
D. Liang ◽  
J. Xiao ◽  
B. Chen ◽  
Ya. Zhang ◽  
...  
Keyword(s):  
Combustion Products ◽  
Primary Combustion Products

CO2 and H2O diluted oxy-fuel combustion for zero-emission power

2005 ◽  
Vol 219 (2) ◽  
pp. 121-126 ◽  
Author(s):  
G. A. Richards ◽  
K. H. Casleton ◽  
B. T. Chorpening
Keyword(s):  
Gas Turbines ◽  
Combustion Products ◽  
Fuel Combustion ◽  
Emission Power ◽  
Power Cycles ◽  
Exhaust Stream ◽  
Zero Emission ◽  
Primary Combustion Products ◽  
Power Generation Systems ◽  
Oxygen Fuel

Concerns about climate change have encouraged significant interest in concepts for zero-emission power generation systems. These systems are intended to produce power without releasing CO2 into the atmosphere. One method to achieve this goal is to produce hydrogen from the gasification of fossil or biomass fuels. Using various membrane and reforming technologies, the carbon in the parent fuel can be shifted to CO2 and removed from the fuel stream, followed by direct CO2 sequestration. The hydrogen fuel can be used directly in gas turbines fitted with low-NO x combustors. A second approach to producing zero-emission power is to replace the nitrogen diluent that accompanies conventional combustion in air with either CO2 or H2O. In this concept, CO2 or H2O is added to oxygen to control combustion temperatures in oxygen-fuel reactions. In the absence of nitrogen, the primary combustion products for any hydrocarbon under lean conditions are then simply CO2 and H2O. Thus, merely cooling the exhaust stream condenses the water and produces an exhaust of pure CO2, ready for sequestration. The dilute oxy-fuel combustion strategy can be incorporated in power cycles that are similar to Brayton or Rankine configurations, using CO2 or H2O as the primary diluent respectively. While the relative merits of the various strategies to zero-emission power are the subject of various technical and economic studies, very little work has focused on defining the combustion issues associated with the dilute oxy-fuel option. In this paper, the expected combustion performance of CO2 and H2O diluted systems are compared. Experimental results from a high-pressure oxy-fuel combustor are also presented.

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