Products

gas pressure pyrotechnics

Pyrotechnic Inflator Pyrotechnic Gas Generators

Pyrotechnic Inflators and Gas Generators Developed and designed to generate a precisely controlled volume of gas output to provide activation energy for mechanical devices. NEco designs and manufactures a complete line of pyrotechnic gas generators and pressure

More

Pyrotechnic Gas Generator Compact & Reliable PacSci EMC

Gas Generators use pyrotechnic mixtures to produce hot gas for a multitude of applications. They can be mechanically, electrically or laser initiated. Upon receipt of an input stimulus, the propellant in the gas generator will ignite, emitting heat, hot particles and/or gas at a controlled rate to provide the necessary input to the next level

More

Energetics Explosive & Pyrotechnic Energetic Devices

These small, lightweight devices use pyrotechnic-generated gas pressure to open or close one or more electrical circuits β€” instantaneously or with delays of up to six seconds. Each switch is hermetically sealed, preventing any leakage of pyrotechnic reaction products. Applications include: Emergency power cut-off; Delay arming of fuses

More

Gas generators, pyrotechnics and explosives Fraunhofer ICT

Gas generators, pyrotechnics and explosives; Gas generators, pyrotechnics and explosives. In this research group, gas generator propellants and explosives are developed for defense and civil applications. Research topics include airbag applications, underwater rescue systems, insensitive high-performance explosives, plastic-bonded explosives

More

Ignition and combustion of pyrotechnics at low pressures

Jun 01, 2017· The gas thermal conductivity is calculated, using the definition of the Prandtl number, from Eq.,where c p is the gas specific heat at constant pressure and ΞΌ is the gas dynamic viscosity evaluated at the gas temperature. (4) k = c p ΞΌ / Pr. The gas dynamic viscosity is calculated using Sutherland's formula,which is shown in Eq. . The

More

US9212103B2 Pyrotechnic pressure accumulator Google

A pyrotechnic pressure accumulator includes an elongated body extending from a first end of a pyrotechnic section to a discharge end of a hydraulic section. A propellant charge located in a gas chamber of the pyrotechnic section, a piston movably disposed the hydraulic section, and a fluid disposed in a hydraulic chamber between the piston and the discharge end, wherein the fluid is

More

US7431335B2 Pyrotechnic stored gas inflator Google Patents

An inflator for use in an inflatable vehicle occupant protection system. The inflator includes a pressure vessel having an opening formed therein. A quantity of relatively unreactive pressurized gas is stored in the pressure vessel. A quantity of a gas generant composition is positioned in an interior of the pressure vessel and in fluid communication with the pressurized gas.

More

Pyrotechnic initiator Wikipedia

A pyrotechnic initiator (also initiator or igniter) is a device containing a pyrotechnic composition used primarily to ignite other, more difficult-to-ignite materials, e.g. thermites, gas generators, and solid-fuel rockets.The name is often used also for the compositions themselves. Pyrotechnic initiators are often controlled electrically (called electro-pyrotechnic initiators), e.g. using a

More

Modeling the Combustion of Pyrotechnic Materials inside

Note that the accumulation of propellant gas into the closed bomb is expressed by the integral βˆ«π‘šΜ‡ π‘π‘Ÿπ‘œπ‘,π‘”π‘Žπ‘  (𝑑)𝑑𝑑 𝑑 0. Implicit in evaluating this integral is that the rate of propellant gas generation at an arbitrary time is a function of pressure (i.e. the burn rate of the propellant is pressure

More

The Pretensioner How Seatbelts Work HowStuffWorks

Some pretensioners are built around electric motors or solenoids, but the most popular designs today use pyrotechnics to pull in the belt webbing. The diagram below shows a representative model. The central element in this pretensioner is a chamber of combustible gas.

More

Energetics Explosive & Pyrotechnic Energetic Devices

These small, lightweight devices use pyrotechnic-generated gas pressure to open or close one or more electrical circuits β€” instantaneously or with delays of up to six seconds. Each switch is hermetically sealed, preventing any leakage of pyrotechnic reaction products. Applications include: Emergency power cut-off; Delay arming of fuses

More

Propellant Actuated Devices Pyrotechnic Pressure

Pressure Cartridges are designed to generate a precisely controlled volume of gas output to provide activation energy for mechanical devices. NEco designs and manufactures a complete line of pyrotechnic gas generators and pressure cartridges to exacting customer and military specifications.

More

Ignition and combustion of pyrotechnics at low pressures

Jun 01, 2017· The gas thermal conductivity is calculated, using the definition of the Prandtl number, from Eq.,where c p is the gas specific heat at constant pressure and ΞΌ is the gas dynamic viscosity evaluated at the gas temperature. (4) k = c p ΞΌ / Pr. The gas dynamic viscosity is calculated using Sutherland's formula,which is shown in Eq. . The

More

GeminiGuide PYROTECHNICS and RETRO ROCKET SYSTEM

The gas pressure is ported into the cylinder and enters an orifice in the base of the indexing bar. The gas pressure is then ported through the hollow inner piston extension and exerts force on the bottom of the outer piston, causing it to sever the retaining pin and extend the

More

US7431335B2 Pyrotechnic stored gas inflator Google Patents

An inflator for use in an inflatable vehicle occupant protection system. The inflator includes a pressure vessel having an opening formed therein. A quantity of relatively unreactive pressurized gas is stored in the pressure vessel. A quantity of a gas generant composition is positioned in an interior of the pressure vessel and in fluid communication with the pressurized gas.

More

Sodium Azotetrazolate: A Novel Environmental-friendly

Oct 22, 2020· Gas-generating pyrotechnics are widely used in airbag inflator, pre-tensioner seat belt, deep-water salvage, fire extinguishing bomb, etc. However, for maintaining prolonged high-pressure, specific gas-generating pyrotechnics are required that are capable of producing water-vapor-free gaseous products to avoid the decrease of pressure caused by the condensation of water vapor.

More

WesCom Pyrotechnics Defence & Commercial

WesCom also produces a range of state of the art gas pressure generators, both for civil and military applications. Since the beginning, the company, which was founded on its present site in Bremerhaven, Germany has specialised in the broad spectrum of pyrotechnic products and services and this expertise continues to drive customer satisfaction

More

Characterizing pyrotechnic igniter output with high-speed

A pyrotechnic hotwire igniter is an electro-explosive device (EED) that converts input electrical energy to mechanical pressure–volume work via an explosion [1]. The pyrotech-nic material is thermally initiated through contact with a metal bridgewire that is heated with approximately 30 mJ of energy [2]. The thermally ignited pyrotechnic

More

Modeling the Combustion of Pyrotechnic Materials inside

Note that the accumulation of propellant gas into the closed bomb is expressed by the integral βˆ«π‘šΜ‡ π‘π‘Ÿπ‘œπ‘,π‘”π‘Žπ‘  (𝑑)𝑑𝑑 𝑑 0. Implicit in evaluating this integral is that the rate of propellant gas generation at an arbitrary time is a function of pressure (i.e. the burn rate of the propellant is pressure

More

The Pretensioner How Seatbelts Work HowStuffWorks

Some pretensioners are built around electric motors or solenoids, but the most popular designs today use pyrotechnics to pull in the belt webbing. The diagram below shows a representative model. The central element in this pretensioner is a chamber of combustible gas.

More

The effects of explosive blast on structures and personnel

alents which could yield a pressure of 1.0 psig, for various dis- tances are described in Table 3. As will be shown later, the only type of structural damage that is likely at a pressure of 1 .0 psig is window-glass breakage. and the only type of injury that is likely to occur at 1.0 psig is

More

Combustion properties of gas-generating pyrotechnics CORE

Combustion properties of gas-generating pyrotechnics . By Kurt Engelen, MH Lefebvre and J De Ruyck. Abstract. This work focuses particularly on solid energetic materials designed to produce high-pressure gas for pressurizing or inflating devices. In cool gas generators sodium azide is often used. Unfortunately this chemical exhibits drawbacks

More

Advanced Pyrotechnics 2: Ignition, Sensitivity, and

Jun 18, 2015· Review: Basics of Pyrotechnics Oxygen source (oxidizer) + electron source (fuel) Products + Energy Energy Output = Light (color) Sound Pressure Motion β€œThe effect” 13 Ingredients for Pyrotechnic Mixes Oxidizing Agents (oxygen rich, occasionally

More

PYROTECHNICS, PROPELLANTS AND EXPLOSIVES

They generate a large gas stream (like all other pyrotechnics) that is channelled with one free end to give propulsive thrust to a projectile or to the combustor body. The main difference between rocket propellants and gun propellants is the working pressure reached, which in rockets is around 10 MPa, and in guns more than 100

More