大加速度场中燃烧过程的计算机仿真

The simulation of combustion process in the large acceleration field

提出了大加速度场中燃烧过程的计算机仿真 ,建立了大加速度场中二维层流燃烧的数学模型 ,对控制方程组进行离散 ,采用SIMPLE算法和交错网格设计并调试程序。在调试成功的程序上进行了丙烷和空气混合气在大加速度场中燃烧的模拟实验。对比了大加速度场中燃烧与非大加速度场情况下的不同 ,当离心力与流速方向相反时 ,流场上流的回流方向为顺时针 ,下游有一顺时针方向的回流区 ,随着加速度的加大 ,两个回流区之间又出现一个逆时针方向的回流区 ,并逐渐加大 。

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 field,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 of premixed fuel of propane and air by the program which we successfully debugged.We contrasted the combustion process in large acceleration field and in non-large acceleration field,when the direction of centrifugal force reverse to the velocity of flow,there is a circumfluence of clockwise on the upriver flow field and a circumfluence of anticlockwise on the downriver flow field.Along with the increase of the centrifugal force,a circumfluence of anticlockwise appeared between the two circumfluences we have known,and its intensity became stronger and stronger,which continued to the point of at which the flow field become turbulent.