火炮同步点火管的燃烧实验和数值模拟

Experiments and Numerical Simulation of Isochronous Core Igniter

为增加火炮点火的同步性,对一种爆轰波传火的火炮同步点火管进行了燃烧实验,测量了点火管不同位置的压力-时间曲线。在考虑火药燃烧过程中同步点火特征、气体湍流和新增燃气质量流流入的基础上,建立了点火管内的燃烧计算模型,用CFD软件对点火管的燃烧过程进行了三维数值模拟计算,并将计算得到的压力-时间曲线与实验曲线进行对比分析。结果表明,点火管具有很高的点火同步性,模拟计算的压力-时间曲线与实验结果基本吻合。

In order to enhance the simultaneity of gun ignition, a kind of isochronous gun igniter with the detonation waves as the ignition stimulation was fired. The pressure vs. time curves at different positions of ignition-tubes were measured. The flame turbulence, isochronous ignition and increasing gas products were considered in the calculation. A calculation modeling was given to simulate the burning in the gun igniter. The 3D simulation of the burning in the gun igniter was conducted by CFD software. The calculated curves of pressure versus time in the ignition-tube were compared with experimental curves. The results indicate that the ignition- tube has good synchronism, and the calculated pressure curves are in agreement with the experimental curves in reasonable range.