论文部分内容阅读
实验测定了是否安装声纳喷管条件下模拟高炉喷煤装置的煤粉流量分配精度，证明气粉两相流在声纳喷管中达到壅塞时，煤粉的分配精度较未装喷管时有很大的提高－ 分析了喷管中达到壅塞所需的条件是要喷管前后的压力比要大于临界压力比，并得出了计算临界压力比的经验式－ 将实验结论与两相平衡流理论进行比较，建立了气粉流表观音速计算公式
The experiment determined whether the accuracy of pulverized coal flow distribution simulated by blast furnace coal injection device is satisfied or not when the sonar nozzle is installed. When the two-phase flow of gas powder reaches the congestion in the sonar nozzle, Has been greatly improved - the condition required to achieve choking in the nozzle is analyzed by assuming that the pressure ratio before and after the nozzle is greater than the critical pressure ratio, and an empirical formula for calculating the critical pressure ratio is derived - the experimental conclusion is in balance with the two phases Flow theory to establish the apparent velocity of powder flow formula