| Titre : | Artificial ageing of the LAW M72 EC Mk2: Construction of a kinetic model according to AOP-48, analysis of the STANAG 4582 method and artificial ageing in other containers |
| Auteurs : | Jens De cock, Auteur ; Editions francis lefebvre ; Francis Lefebvre, Directeur de thèse |
| Type de document : | Thesis |
| Editeur : | Brussels [Belgique] : Royal Military Academy, 2018-2019 |
| Article en page(s) : | 70 p. |
| Langues: | Anglais |
| Catégories : |
6.60 Equipements et installations > Équipement militaire > Arme |
| Tags : | POL 169 ; Master's dissertations ; Military--Rocket launchers ; Rocket launchers ; Rocket launchers (Ordnance) |
| Résumé : |
In this thesis, the physico-chemical ageing of the LAW M72 EC rocket engine M7 double base
propellant was studied. This was done by articial ageing inside ovens. In total, ten engines were studied. Four of the engines were opened and their propellant sticks were put into aluminum bags or vials that are used in heat ow calorimetry. The other six were aged intact. This was to verify whether ageing in these dierent types of containers yields the same results as ageing inside the complete engine. Another goal was to establish a kinetic model that describes the depletion of the propellant to help the material manager to decide whether the propellant has become unstable and if it should be destroyed or not after a certain period of time. Analysis of the propellant was done by means of chemical analysis using high performance liquid chromatography or by means of heat ow calorimetry. For the ageing in aluminum bags, the same stabilizer depletion rate was observed as in the complete engines, conrming the experimental protocol. For the propellant that aged in the vials used in heat ow calorimetry, there was a signicant dierence, namely a faster depletion rate because of the presence of oxygen and leaks, leading to the conclusion that heat ow calorimetry provides results that are more conservative than reality. An inuence of the shape in which the propellant sticks were cut was also demonstrated, showing that the smaller the pieces in which the sticks were cut (higher loading density), the faster the depletion occurs. Based on the data obtained through chemical analysis, ve dierent models of stabilizer depletion were established after chemical analysis and one of them was proposed to be the optimal model, taking into account the simplicity versus the accuracy of these models, as well as their intrinsic safety margin. |
| Promotion : | 169 POL |
| En ligne : | http://units.mil.intra/sites/UBDef-BUDef/_layouts/DocIdRedir.aspx?ID=UBDEF-6-22035 |
Exemplaires (1)
| Code-barres | Cote | Support | Localisation | Section | Disponibilité |
|---|---|---|---|---|---|
| 113 | 338.476 234 4 DEC A | Thesis | Royal Military Academy | Bibliothèque ERM | Exclu du prêt |
