Commenced in January 2007
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Paper Count: 32586
Evaluation of Internal Ballistics of Multi-Perforated Grain in a Closed Vessel

Authors: B. A. Parate, C. P. Shetty

Abstract:

This research article describes the evaluation methodology of an internal ballistics of multi-perforated grain in a closed vessel (CV). The propellant testing in a CV is conducted to characterize the propellants and to ascertain the various internal ballistic parameters. The assessment of an internal ballistics plays a very crucial role for suitability of its use in the selection for a given particular application. The propellant used in defense sectors has to satisfy the user requirements as per laid down specifications. The outputs from CV evaluation of multi-propellant grain are maximum pressure of 226.75 MPa, differentiation of pressure with respect to time of 36.99 MPa/ms, average vivacity of 9.990×10-4/MPa ms, force constant of 933.9 J/g, rise time of 9.85 ms, pressure index of 0.878 including burning coefficient of 0.2919. This paper addresses an internal ballistic of multi-perforated grain, propellant selection, its calculation, and evaluation of various parameters in a CV testing. For the current analysis, the propellant is evaluated in 100 cc CV with propellant mass 20 g. The loading density of propellant is 0.2 g/cc. The method for determination of internal ballistic properties consists of burning of propellant mass under constant volume.

Keywords: Burning rate, closed vessel, force constant, internal ballistic, loading density, maximum pressure, multi-propellant grain, propellant, rise time, vivacity.

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References:


[1] Closed vessel ballistic assessment of gun propellant - DEF STAN13-191/1
[2] Shetty C P, Mehta Pragati, Kaur Sandeep, Mishra K K, Jha R K, Vikram Singh & Himanshu Shekhar. Studies on Closed Vessel Evaluation of Nitramine Based Large-Web Gun-Propellants, Proceedings of 12th Int. High Energy Materials Conf. & Exhibit (HEMCE) 2019 held at Chennai.
[3] Parate B A, Deodhar K D, Dixit V K and Rao Venkateswara V. Ballistics of main seat ejection cartridges for aircraft application, International Conference on Ballistics, held at Sydney Australia, Pt VI, 2021, pp 662-669
[4] Specification to govern manufacture inspection and supply of propellant NC/M 145 for use in cartridge initiator type F-71 A for Vajra Aircraft, Specn. No.: ERDL/GP/PS/251
[5] Closed vessel RB series measurement of ballistic parameters of gun propellant-OZM Research, Instrument and Technologies for Energetic Materials.
[6] Divekar C N, Khire Vruushali, Mahore B, Gore G M, Chakraborthy T K and Amarjit Singh. Studies on Web Size Variation of Double Base Gun Propellants on Closed Vessel (CV) Results, 8th International High Energy Materials Conference and Exhibit, 2011.
[7] Parate B A, Salkar Y B Chandel and H Shekhar. Characterisation of Power Cartridge for Water-jet Application, Defence Technology, 2018, 14, 683-690. doi.org/10.1016/j.dt.2018.04.003