Simulation Of Combustion Process In The Large Acceleration Field

In the thesis,we proposed the topic of the simulation of combustion process in the large acceleration field. We set up the math model of two-dimensional laminar flow in large acceleration, discretised the equation of combustion system, designed and debugged the program to simulate the combustion process in large acceleration by SIMPLE algorithm and staggered grid system.We simulated the combustion process in large acceleration of diffusion fuel and premixed fuel of methane and air by PHOENICS. We contrasted the combustion process in large acceleration field and in non-large acceleration field.Firstly We investigated the flow field and temperature field of diffusion fuel .When the direction of centrifugal force as same as the velocity of flow, there is a circumfluence of anti-clockwise. When the velocity of methane is unchangeable,the more fuel/air is,the intensity of circumfluence is stronger. When the centrifugal force is added, the intensity of circumfluence is increased along with the increase of centrifugal force. We investigated the transformation of the flow field with the increase of centrifugal force. When the acceleration became bigger, the flow field has a main circumfluence of anti-clockwise and a circumfluence of clockwise on the downriver. We investigated the transformation of the combustion with the increase of centrifugal force. When the acceleration became bigger, the temperature of high temperature field is increased and the flame became wider.Secondly We investigated the flow field and temperature field of premixed fuel. Premixed fuel is not originally been influenced by centrifugal force. Premixed fuel changed greatness with the increase of centrifugal force. When the direction of centrifugal force as same as the velocity of flow,the fuel became short.