Combustion Instability and Pressure Oscillation Numerical Simulation in a Solid Rocket Motor

2017 ◽  
Author(s):  
Ainslie D. French ◽  
Mario Panelli ◽  
Giuseppe Di Lorenzo ◽  
Antonio Schettino ◽  
Fabio Paglia
Keyword(s):  
Numerical Simulation ◽  
Combustion Instability ◽  
Pressure Oscillation ◽  
Rocket Motor ◽  
Solid Rocket Motor ◽  
Solid Rocket

Mache Effect and Combustion Instability in Solid Rocket Motor

1999 ◽  
Vol 15 (6) ◽  
pp. 856-860 ◽  
Author(s):  
Igor G. Assovskiy ◽  
Sergei A. Rashkovskiy
Keyword(s):  
Combustion Instability ◽  
Rocket Motor ◽  
Solid Rocket Motor ◽  
Solid Rocket

scholarly journals Effects Of Grain Geometry And Vibration On The Suppression Of Combustion Instability In A Solid Rocket Motor

2021 ◽  
Author(s):  
Christopher Baczynski
Keyword(s):  
Pressure Wave ◽  
Combustion Instability ◽  
Combustion Process ◽  
Rocket Motor ◽  
Structural Vibration ◽  
Solid Rocket Motor ◽  
Aspect Ratios ◽  
Port Area ◽  
Solid Rocket ◽  
The Given

A comprehensive numerical model for internal ballistic simulation under dynamic flow, combustion and structural vibration conditions is used to investigate the effectiveness of grain port area transitions of a reference solid rocket motor as a means for suppression of axial combustion instability symptoms. Modification of the propellant grain geometry is one of several traditional means for suppressing symptoms in actual motors. With respect to these symptoms, individual transient simulation runs show the evolution of the axial pressure wave and associated DC shift for the given grain geometry, as initiated by a given pressure disturbance. Limit pressure wave magnitudes are collected for a number of simulation runs for different grain area transition positions, steepness and aspect ratios, and mapped on an attenuation trend chart. Effects of acceleration, through structural vibration of the propellant surface, on the combustion process are investigated, and their influence on the effectiveness of grain area transitions is examined. With or without acceleration/vibrations effects included, the numerical results produced in this study confirm the significant ability of a grain area transition to suppress combustion instability symptoms.

Sign in / Sign up

Export Citation Format

Share Document