An experimental and numerical approach - characterisation of power cartridge for water-jet application

Parate, Bhupesh Ambadas; Chandel, Sunil; Shekhar, Himanshu

doi:10.1016/j.dt.2018.04.003

Cited by 6 publications

(3 citation statements)

References 6 publications

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“…With 5 factors (diameter of the device, resistance of the inner tube, density of the water, specific mass of the explosive, and distance to the IED), and 2 levels per factor, a complete multifactorial DoE requires a minimum of 2 5 = 32 tests. The design can be optimized by reducing it to a fractional factorial design of 1/2, with resolution V [12], thus obtaining a research plan of 16 tests, by which it is possible to obtain information about the influence of each of the 5 main factors, and about all two-by-two interactions [13]. The interactions of three or more factors are highly unlikely in any system and, usually, only 20% of the main effects and of the interactions of two factors are significant-that is, "a few vital" and "many trivial" [17].…”

Section: Methodsmentioning

confidence: 99%

“…Radomski [11] addresses the simulation of the internal ballistics of a two-chambered recoilless projected water disruptor. Parate et al [12] use a single base propellant, also with a directional disruptor, for an experimental study oriented towards qualification tests (impact, sealing, vibration, shock, etc.). On cylindrical devices, Cherry [8] patented a fluid-filled bottle or plastic container that contains an adjustable sheet explosive, to direct the fluid projectile towards the IED.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Evaluation of the Factors That Influence Cylindrical Water Projection Devices against IEDs

et al. 2023

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Terrorists usually employ Improvised Explosive Devices (IEDs) to cause maximum damage with a single action, in asymmetric war scenarios. In the counter-terrorism fight, bomb disposal specialists have to combat these instruments by safeguarding their lives, avoiding fortuitous IED explosion, and preserving evidence of the device that could lead to the capture of the perpetrators. Some very effective deactivation tools that combine these features are high-speed water-explosive projection devices. To understand and quantify the impacts of the many factors that intervene in their operation and effectiveness, extensive experimental tests should be conducted. However, Operations Research techniques allow robust results to be obtained by minimizing experiments. This study focuses on the use of Design of Experiments (DoE), with a factorial experiment plan divided into two levels, to analyze the influence of the amount of explosive, the diameter of the device (that is, the mass of water to be projected), the density of the water, the distance at which the IED is located, and the resistance of the inner tube material. Results show that the mass of explosive, the diameter of the device, the interaction of the mass of explosive and the density of the water, and the interaction between the resistance of the inner tube and the diameter of the container have a strong influence on the speed of projected water.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Evaluation of the Factors That Influence Cylindrical Water Projection Devices against IEDs

et al. 2023

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“…The internal pressure generated inside the cartridge case can be determined by using the following relation [28]:…”

Section: Estimation Of Internal Pressure (P I )mentioning

confidence: 99%

A Novel Method for Dynamic Pressure and Velocity Measurement Related to a Power Cartridge Using a Velocity Test Rig for Water-Jet Disruptor Applications

Parate¹,

Salkar²,

Chandel³

et al. 2019

Cent. Eur. J. Energ. Mater.

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Power cartridges are gas generators utilised to drive a liquid projectile for disruption of suspect improvised explosive devices (IED's). The purpose of a water-jet disruptor is to destroy the suspected IED. A novel method was devised for pressure measurement at the exit of the cartridge for launching liquid projectile. An experimental test set-up was designed and fabricated for measurement of projectile velocity and the propellant gas pressure in a velocity test rig (VTR). In these experiments, double base propellants having different physical and chemical properties were utilised to drive the solid projectile. This projectile was made of nylon material. This projectile velocity measurement is an important parameter in the armament field. An experimental study is the unique design feature. It is responsible for the measurement of pressure at the exit of the cartridge and the projectile velocity at the muzzle end of the barrel. The projectile velocity was measured using high speed photography. The pressure was measured using a pressure sensor.propellants have been experimentally measured as 384.23 m/s and 418.32 m/s, respectively. Experimentally the maximum pressures for spherical ball powder and NGB 051 propellants have been evaluated as 50.12 MPa and 63 MPa respectively from data gathered by the acquisition system. The standard deviation between the experimental and theoretical values for the projectile velocity varied from 12.57 to 13.88 for spherical ball powder whereas it was 5.33 to 7.09 for NGB 051 propellant. The percentage error between the experimental and the theoretical values of the projectile velocity was less than 10 for both propellants. Nomenclature: C Mass of propellant [g] d Internal diameter of VTR chamber where propellant pressure is acting on projectile or inside cartridge diameter for loading propellant mass [m] e Fluid internal energy [J] F Force constant of propellant [J/g] g Acceleration due to gravity (9.81 m/s 2 ) l Length of VTR chamber where propellant pressure is acting on projectile or inside cartridge length for loading propellant mass [mm] m Mass flow rate [kg/s] P i Internal pressure of propellant [MPa] Q Heat transfer across the system boundaries [J] V Volume of VTR chamber or volume of cartridge [cm 3 ] V 0 or V th Theoretical projectile velocity [m/s] Ws Mechanical work [J] y Datum head [m] Subscripts: i Inlet o Outlet Greek Symbols: π Constant (3.14) ρ Density [kg/m 3 ]

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Design Analysis of Brass Cartridge Case for Water Disruptor Application

Parate

Khandagale

Chandel

et al. 2019

Advances in Simulation, Product Design and Development

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An experimental and numerical approach - characterisation of power cartridge for water-jet application

Cited by 6 publications

References 6 publications

Experimental Evaluation of the Factors That Influence Cylindrical Water Projection Devices against IEDs

Experimental Evaluation of the Factors That Influence Cylindrical Water Projection Devices against IEDs

A Novel Method for Dynamic Pressure and Velocity Measurement Related to a Power Cartridge Using a Velocity Test Rig for Water-Jet Disruptor Applications

Design Analysis of Brass Cartridge Case for Water Disruptor Application

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