Effect of aluminium in propellant composition on acoustic emission parameters (Short Communication)

Defence Science Journal

K. S. Sastri¹  Rm. Muthiah¹  T. Chelladurai¹  S. S. Rao¹  T. E. Krishnan¹  K. N. Ninan¹ 

[1] Vikram Sarabhai Space Centre, Thiruvananthapuram

关键词: Propellants;    Ballistics;    Military technology;    Acoustic emission parameters;    Propellant performance;   

DOI  :  

学科分类：社会科学、人文和艺术（综合）

来源: Defence Scientific Information & Documentation Centre

【 摘 要 】

The study reports the variation inacoustic emission signals acquired during combustion of typicalpropellants with varying aluminium and ammonium perchlorate content. Itwas observed that when propellant strands having the same compositionundergo combustion under similar conditions, they produce consistentacoustic emission signals. To study the effect of variation of aluminiumcontent in the propellant composition on the acoustic emission producedduring combustion, the aluminium content was varied from 6 per cent to18 per cent in a HTPB-based composite propellant with 86 per cent solidloading. Experiments were carried out with propellant strands under thesame conditions for a comparative study. Acoustic emission parameters,such as peak amplitude, ring-down counts, average frequency, hits andenergy were studied as functions of time. Among these parameters, onlyenergy ring-down counts and frequency varied significantly withaluminium content. The effect of cumulative values of energy, frequencyand ring-down counts, the effect of burn rate and theoretical specificimpulse against the aluminium percentage variation, and the variation ofspecific impulse against acoustic energy can all be correlated. Theclear trend is indicative of possible prediction of propellantperformance parameter like specific impulse from acoustic emissionparameters.

【 授权许可】

Unknown