Burn rate (chemistry)

About: Burn rate (chemistry) is a research topic. Over the lifetime, 847 publications have been published within this topic receiving 8908 citations. The topic is also known as: Burning rate.

Transient Combustion in Granular Propellant Beds. Part II. Experimental Study of Transient Combustion Processes in Mobile Granular Propellant Beds

Abstract: : Catastrophic failure of propulsion and gun systems has been attributed to abnormal combustion within granular propellant charges. The effects of igniter strength, propellant type, deterrent concentration, and projectile motion on the overall transient combustion process in granular propellant beds were studied experimentally. The results show that igniter strength significantly affects the duration of the induction period, and also the accelerative behavior of the pressure front traveling through the bed; a weaker igniter causes a more pronounced pressure front acceleration. A large igniter volume was found to reduce the rate of flame spreading and pressurization processes. Combustion of slightly deterred propellants produced extremely rapid flame spreading, higher peak pressures, and higher pressurization rates than regularly deterred propellants. Propellant particle geometry was found to greatly affect the rate of total mass consumption within a propellant bed and thereby influence the peak pressures and pressure wave phenomena within the bed. (Author)

Research Progress in the Burning Rate Measurement Technology of Solid Propellant

Abstract: The current research situation of static burning rate,dynamic burning rate and measurement technology of burning rate under specific environment for solid propellant,and characteristics of various burning rate measurement methods were reviewed.Considering that the general development rule of solid propellant burning rate measurement technology is that from the static burning rate measurement gradually developed into the dynamic burning rate measurement.On the basis of the dynamic burning rate measurement,the rotating overload burning rate measurement technology and burning rate measurement technology under the transient pressure condition appeared.The existing burning rate measurement technology is also used to test the combustion performance of commonly used high-energy additives in solid propellant.The future development direction of the combustion performance testing technology of solid propellant,including high pressure(ultra pressure)combustion performance measurement technology,ultra low pressure(vacuum,)combustion performance measurement technology and low temperature microgravity combustion performance measurement technology etc,is pointed out with 55 references.

An Investigation of the Effects of Acceleration on the Burning Rates of Solid Propellants

Abstract: : The acceleration sensitivity of aluminized and nonmetallized composite and double-base propellants were investigated. A review of previous experimental findings and current analytical models was also conducted. An investigation was conducted to determine the cause(s) for the differences in burning rate augmentation data reported by various investigators. Strand length (burn time) was found to be the dominant factor. Lead and copper additives commonly found in double-base propellants were found to decrease the burning rate with increasing acceleration. Burning rate instability was also obtained at high accelerations. The addition of aluminum increased the burning rate at any given acceleration.