Table 1.
Comparison of blast wave onset locations and incident pressures between compressed air and compressed helium shock tube. We used the ambient pressure p1=101.325 kPa.
| incident pressure |
shock pressure ratio (p2−p1)/p1 |
blast location L |
|||||
|---|---|---|---|---|---|---|---|
| driver pressure (kPa) | air (kPa) | helium (kPa) | air | helium | length (m) | air (m) | helium (m) |
| 234.0 | 152.0 | 186.0 | 0.50 | 0.84 | 0.25 | 4.89 | 1.33 |
| 0.50 | 9.79 | 2.67 | |||||
| 0.75 | 14.68 | 4.00 | |||||
| 1.00 | 19.57 | 5.34 | |||||
| 440.0 | 202.7 | 276.5 | 1.00 | 1.73 | 0.25 | 4.14 | 1.19 |
| 0.50 | 8.28 | 2.38 | |||||
| 0.75 | 12.43 | 3.57 | |||||
| 1.00 | 16.57 | 4.76 | |||||
| 1153.1 | 304.0 | 503.1 | 2.00 | 3.97 | 0.25 | 4.47 | 1.32 |
| 0.50 | 8.95 | 2.64 | |||||
| 0.75 | 13.42 | 3.96 | |||||
| 1.00 | 17.90 | 5.28 | |||||
| 2452.8 | 405.3 | 770.1 | 3.00 | 6.60 | 0.25 | 5.33 | 1.58 |
| 0.50 | 10.66 | 3.17 | |||||
| 0.75 | 15.99 | 4.75 | |||||
| 1.00 | 21.32 | 6.33 | |||||