Multiple pulse segmented gas generator

Abstract

A method and apparatus for producing gas, for example for propulsion. Propellant grains are segmented, preferably in symmetrically arranged pairs and preferably about a central channel extending longitudinally between the ends of the grains. Longitudinally extending grains may be ignited at one end only of each grain, at both ends, and / or at one or both ends along with at an interior portion of a grain. In order to maintain a relatively constant center of gravity, symmetrically arranged pairs of grains can be ignited simultaneously. In order to produce a desired pressure versus time profile, the number of ignition points on a grain can be varied.

Description

BACKGROUND OF THE INVENTIONS [0001] 1. Field [0002] These relate to gas generators, for example solid propellant gas generators, including those used to supply warm-gas and hot-gas thruster valves. Other examples include inflation devices, including air bags and the like. [0003] 2. Related Art [0004] Solid propellant gas generators are used in rocket, missile, interceptor and other space vehicle flight control systems, among other applications. One or more solid propellant masses, such as grains, rods or other structures, are included in a pressure vessel or other structure having one or more openings. The openings lead to a rocket motor and / or reaction jets that vary the thrust, pitch, yaw, roll or spin rate and other dynamic characteristics of a vehicle in flight. Once a given propellant mass is ignited, combustion or consumption of the fuel typically cannot be stopped, and the entire mass is eventually consumed. Assembly of several discrete masses of solid propellant permits grea...

AI Technical Summary

Benefits of technology

The patent text describes various improvements and methods for propellant grains, solid propellant gas generators, and thrusters. These improvements can include new configurations, new methods of operation, and new ways of maintaining a constant center of gravity. The text also discusses the use of igniters or initiators, as well as the flexibility of ignition sequence and application. Overall, the patent text provides technical means for enhancing the performance and operation of gas producing assemblies.

Problems solved by technology

Once a given propellant mass is ignited, combustion or consumption of the fuel typically cannot be stopped, and the entire mass is eventually consumed.

However, some multiple pulse grains may require ignition in a fixed sequence or taking into account a specific geometric configuration, such as require burning from inside out.

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