0 引言
1 试验
1.1 试验设计
1.2 试验结果
2 数值模拟
2.1 含铝浇注炸药烤燃模型
2.2 慢速烤燃数值模拟
表1 材料物性参数Table 1 Materials parameters |
| ρ/ (kg·m-3) | C/ (J·kg-1·K-1) | λ/ (W·m-1·K-1) | |
|---|---|---|---|
| Steel | 7850 | 480 | 43 |
| Charge | 1809 | 1012 | 0.49 |
| Air | 1.225 | 1004 | 0.0242 |
2.3 结果与分析
2.3.1 模拟与试验结果对比
表2 有无缩孔点火时间及监测点温度计算值与试验值的对比Table 2 Comparison between calculated and experimental values of ignition time and monitoring point temperature without shrinkage holes |
| Without shrinkage holes(N1为试验所测温度值;N2为仿真计算温度值) | |||
|---|---|---|---|
| N1/℃ | N2/℃ | Relative error/% | |
| Point1/℃ | 181.2 | 184.88 | 2.03 |
| Point2/℃ | 164.2 | 159.11 | 3.10 |
| Point3/℃ | 165.9 | 160.68 | 3.15 |
| Point4/℃ | 164.1 | 158.57 | 3.37 |
| Point5/℃ | 179.8 | 175.65 | 2.31 |
| Ignition time/s | 159967 | 159340 | 0.39 |
表3 有缩孔点火时间及监测点温度计算值与试验值的对比Table 3 Comparison between calculated and experimental values of ignition time and monitoring point temperature with shrinkage holes |
| With shrinkage holes(N1为试验所测温度值;N2为仿真计算温度值) | |||
|---|---|---|---|
| N1/℃ | N2/℃ | Relative error/% | |
| Point1/℃ | 182.6 | 183.29 | 0.38 |
| Point2/℃ | 165.7 | 159.21 | 3.92 |
| Point3/℃ | 166.3 | 160.48 | 3.50 |
| Point4/℃ | 164.6 | 159.16 | 3.30 |
| Point5/℃ | 178.1 | 177.05 | 0.59 |
| Ignition time/s | 162964 | 157740 | 3.21 |