電站鍋爐燃燒器內(nèi)氣固兩相流動(dòng)的數(shù)值模擬.pdf

1、上海交通大學(xué)碩士學(xué)位論文電站鍋爐燃燒器內(nèi)氣固兩相流動(dòng)的數(shù)值模擬姓名：許冰申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：熱能工程指導(dǎo)教師：黃榮國20040201NUMERICAL SIMULATION OF GAS- SOLID TWO- PHASE FLOW IN BURNER FOR POWER STATION BOILER ABSTRACT Gas- solid two- phase flow can be applied widely

2、 in many engineering fields. The correct prediction of two- phase velocity, solid particle concentration, distribution of turbulent kinetic energy has great engineering practical significance. By means of multi- fluid m

3、odel and particle trajectory model, numerical simulation is carried out on the cold state gas- solid two- phase flow in burner for power station boiler of Guizhou Province. First, a FORTRAN procedure is

4、developed to numerically solve the problems of gas- solid two- phase flow in burner by using body- fitted coordinates. Turbulent locomotion of two- phase is simulated by P k A ε ? ?model. In the procedure, t

5、he whole domain is divided into a number of simple sub- domains and the SIMPLEC algorithm is utilized to solve the governing equations in each sub- domain. According to the theory of fluid dynamic

6、s and the computational results issued in some publications, the present results are reasonable in view of the physical reality. Second, numerical simulation of gas- solid two- phase flow in two kinds

7、of burners is carried out by stochastic particle trajectory model. The calculation results show that the particle trajectory is related to the diameter of solid particle, the concentration of solid particle and

8、 gas locomotion characteristic. At the same time, the calculation results show that the diamond barrier can mix up the coal and gas fully, which is very important for the steady combustion. The resu