CALCULATION OF THE IGNITION DELAY TIME OF METALLIZED SOLID PROPELLANT BY A CONVECTIVE HIGH-TEMPERATURE FLOW

2020 ◽  
Author(s):  
V. L. Goiko ◽  
◽  
V. A. Poryazov ◽  
A. Yu. Krainov ◽  
◽  
...  
Keyword(s):  
Mathematical Model ◽  
High Temperature ◽  
Ignition Delay ◽  
Delay Time ◽  
Solid Propellant ◽  
Ignition Delay Time ◽  
Stationary Combustion

This paper presents a mathematical model and methodology to calculate the ignition delay time and the stationary combustion formation of a metallized solid propellant with aluminum additives ignited by a convective high-temperature flow.

scholarly journals Ignition and combustion of high-energy materials containing aluminum, boron and aluminum diboride

2018 ◽  
Vol 194 ◽  
pp. 01055
Author(s):  
Alexander Korotkikh ◽  
Ivan Sorokin ◽  
Ekaterina Selikhova
Keyword(s):  
Burning Rate ◽  
Ignition Delay ◽  
Delay Time ◽  
Solid Propellant ◽  
Ignition Delay Time ◽  
High Energy ◽  
Solid Propellants ◽  
Amorphous Boron ◽  
Aluminum Diboride ◽  
Ignition And Combustion

Boron and its compounds are among the most promising metal fuel components to be used in solid propellants for solid fuel rocket engine and ramjet engine. Papers studying boron oxidation mostly focus on two areas: oxidation of single particles and powders of boron, as well as boron-containing composite solid propellants. This paper presents the results of an experimental study of the ignition and combustion of the high-energy material samples based on ammonium perchlorate, ammonium nitrate, and an energetic combustible binder. Powders of aluminum, amorphous boron and aluminum diboride, obtained by the SHS method, were used as the metallic fuels. It was found that the use of aluminum diboride in the solid propellant composition makes it possible to reduce the ignition delay time by 1.7–2.2 times and significantly increase the burning rate of the sample (by 4.8 times) as compared to the solid propellant containing aluminum powder. The use of amorphous boron in the solid propellant composition leads to a decrease in the ignition delay time of the sample by a factor of 2.2–2.8 due to high chemical activity and a difference in the oxidation mechanism of boron particles. The burning rate of this sample does not increase significantly.

High temperature ignition delay time of DME/n-pentane mixture under fuel lean condition

Fuel ◽  
2017 ◽  
Vol 191 ◽  
pp. 77-86 ◽  
Author(s):  
Xue Jiang ◽  
Fuquan Deng ◽  
Feiyu Yang ◽  
Yingjia Zhang ◽  
Zuohua Huang
Keyword(s):  
High Temperature ◽  
Ignition Delay ◽  
Delay Time ◽  
Ignition Delay Time

scholarly journals MATHEMATICAL MODELING OF THE METALLIZED SOLID PROPELLANT IGNITION BY A HIGH-TEMPERATURE CONVECTIVE FLOW

2020 ◽  
pp. 126-140
Author(s):  
Poryazov V.A. ◽  
◽  
Krainov A.Yu. ◽  
Keyword(s):  
High Temperature ◽  
Ignition Delay ◽  
Convective Flow ◽  
Solid Propellant ◽  
Ignition Time ◽  
Turbulent Heat ◽  
Combustion Mode ◽  
Stationary Combustion ◽  
Ignition Time Delay ◽  
The Impact

This paper presents a mathematical model and a methodology to calculate stationary combustion of a metallized solid propellant with aluminum additives ignited by a hightemperature convective flow. The study considers the ignition of a semi-infinite slab of the metallized solid propellant which is blown over by an unlimited high-temperature flow. A boundary-layer approximation is used to develop the ignition model. The high-temperature blowing effect is taken into account in the model by means of turbulent heat and mass transfer. The paper provides a numerical and theoretical analysis on the impact of the velocity and temperature of the convective flow on the ignition time delay and the stationary combustion mode establishment. The analysis shows that the proposed approach allows calculating the time of the ignition delay and stationary combustion mode establishment for the metallized solid propellant. Moreover the ignition delay and the period of the stationary combustion mode establishment are found to be controlled by both the velocity and temperature of the convective flow.

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