The investigation of interior ballistic performance affected by the variations of component and geometry on stick propellant

• Main Authors: Chao Hsiao-Min, 趙小敏
• Other Authors: Luo Kuo-Ming
• Format: Others
• Language: zh-TW
• Published: 1998
• Online Access: http://ndltd.ncl.edu.tw/handle/69404023995092783176

碩士 === 中正理工學院 === 應用化學學系研究所 === 86 === In this investigation, there are four types of stick propellants ,i.e.,M31A1E1,M31A1,M6 and M30 were studied. These propellants contain three typesof geometries. Which are 1-perforated cylinder, 7-perforated cylinder andslotted tube respectively. This research fields in these propellants includefour parts as following : the propellants'' thermodynamic properties, the combustion phenomena of propellants, the simulation and analysis in interior ballistics ; and the affection of propellants'' charge weight and loading density on the ballistic performance. The properties of the theoretical thermodynamic equilibrium were calculated using CET86 and BLAKE computer code.The combustion performance were computed using the experimental combustiondata in a closed bomb incorporated with the computer code of BallisticsResearch Laboratory in Closed Bomb (BRLCB). The interior ballistic characteristicfor various propellants were analyzed by means of the "Interior Ballistics of High Velocity Guns" computer code (IBHVG2),respectively. All of the above stickpropellants'' interior ballistics performance were calculated in the M198/155mmor M68/105mm cannon. The variations of interior ballistics performance werestudied by means of systematical changing the quantity of propellants'' charge weight and loading density. The results reveal that the M31A1E1 slotted tube propellants'' burning rate is faster than 1-perforated cylinder propellants'' burning rate. The shorter the stick propellant is, the faster the burning rateis. How ever, owing to the degressive burning in slotted tube propellant, itsburning rate is not fast enough and require further promote its performancein the future. The variations of propellants'' charge weight and loading density do not significantly affect the interior ballistic performance. The stick propellants'' burning rates characteristics plays an important role on the bullet''s initial speed and chamber pressure. A major part of propellants'' qualityis decided by this burning rate characteristics. Although the variations of propellants geometries change the bullet initial speed in experimental results, it is hard to obtain these results from theoretical calculation directly. Thetheoretical calculation must be incorporated with a closed bomb''s experimentaldata. Then, the propellant''s burning rate can be found out. In the future investigation in propellants, we must correlate the relationship between theirmanufacturing condition and the analysis in performance. The experimental results are incorporated with BRLCB and IBHVG2 computer code to analyze their combustioncharacteristics and interior ballistic performance. This technique is not onlyhelp us to develop the propellants with higher performance in the near future,but also promote the manufacture and design potential in the propellants.