| Autor: |
Stiel, Leonard, Samuels, Philip, Baker, Ernest, Rydzewski, David |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2023, Vol. 2844 Issue 1, p1-6, 6p |
| Abstrakt: |
Cylinder velocities calculated with an analytic cylinder model utilizing parameters generated from the Jaguar thermochemical equilibrium program with a nominal 2200 K product reaction freeze temperature have been found to be generally in agreement with experimental streak values to within 2% at high expansions. However, analyses of recent cylinder test data obtained by accurate PDV procedures indicate larger deviations at high expansions with these procedures. A previous study has suggested that higher freeze temperatures are required for highly nonideal explosives such as TNT. In order to investigate the effects of the freeze temperature and corresponding oxygen balance for optimum agreement with PDV cylinder velocities, results for a number of explosive formulations have been analyzed in detail. The formulations include HMX, RDX, and TNT - based systems and literature data for a Cl-20 based explosive. Ratios of calculated to experimental cylinder velocities for the formulations are found to decrease with increasing freeze temperature in the range 2200 K to 3000 K. There is no apparent trend with oxygen balance for these explosives, but the ratio for the more ideal Cl-20 formulation is close to 1.0 for the entire temperature range. For the explosives considered the average error between calculated and experimental velocities is reduced to under 1% at 7 area expansions with an optimum freeze temperature of 3000 K. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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