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Thermokinetic Analysis and Performance Evaluation of Guanidinium Azotetrazolate Based Gas Generating Composition for Testing of Solid Rocket Motor Nozzle Closures
Author(s) -
Harikrishnan Erezhath Shani,
Hariharanath Bodagala,
Vineeth Gayathri Muraleedharanpillai,
Purushothaman Pokkan
Publication year - 2018
Publication title -
propellants, explosives, pyrotechnics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.56
H-Index - 65
eISSN - 1521-4087
pISSN - 0721-3115
DOI - 10.1002/prep.201800103
Subject(s) - nozzle , ammonium perchlorate , propellant , solid fuel rocket , isothermal process , materials science , combustion , rocket engine nozzle , thermal decomposition , thermodynamics , nuclear engineering , chemistry , engineering , physics , organic chemistry
A gas generating composition (GGC) was designed with Guanidinium azotetrazolate (GZT) as fuel and Ammonium perchlorate (AP) as an oxidizer for burst testing of nozzle closure at rig level, simulating solid rocket motor ignition transient and propellant flame temperature. EXPLO5 software code was used for formulation studies. The selected GGC formulation was subjected to thermokinetic analysis for understanding the thermal decomposition behaviour as well as evaluating kinetic and thermodynamic parameters of decomposition.The non‐isothermal kinetic parameters of the composition over the extent of conversion were determined using two isocoversional methods viz; Flynn‐Wall‐Ozawa (FWO) and Kissinger–Akahira–Sunose (KAS). GGC in pellet form was fired using a pyrotechnic pressure generating device (PPG) in test rig level with nozzle closure. The nozzle closure was burst opened at a pressure of 0.985 MPa with a pressurization rate of 10.3 MPa s −1 .