大长径比点火管高密实火药床点传火过程两相流的数值模拟

设计了某中心点火管，完成了该点火管的点传火实验，针对该点火管长径比大、装填密度高的特点，建立了点火管内气固两相流动和燃烧过程的一维两相流模型，并进行了数值模拟。计算结果与实验结果良好符合，说明计算模型能够准确描述点火管内的实际物理化学过程，计算程序参数取值合理，该计算程序可为此类点火管各种结构尺寸及装填条件下的点传火性能分析及优化计算提供充分的理论依据和方法。并且，根据计算结果初步分析了该结构及装填条件下点火管的点传火性能，为下阶段工程优化设计提供参考

Two-phase flow in ignition process of consolidated charge bed within a large length-to-diameter ratio igniter tube

A central igniter tube was designed according to engineering requirements and firing tests were completed. By considering the large length-to-diameter ratio and consolidated charge of the designed igniter tube, a one-dimensional, two-phase flow model was developed to numerically simulate the combustion process of the gas-solid two-phase flow. The simulated results are consistent with the measured ones. So the developed two-phase flow model can correctly describe the actual physical process and the parameters used in the program are reasonable. The calculation program can provide a theoretical guidance for the ignition performance analysis and optimal design of the igniter tube in different construction measurements and charge conditions. The ignition performances of the igniter tube were also analyzed on the basis of the computational results, which providing reference for the optimal design in further work.