Solid Rocket Booster (SRB)-Based Starter System

Award Information
Agency: Department of Defense
Branch: Army
Contract: N/A
Agency Tracking Number: 20625
Amount: $50,000.00
Phase: Phase I
Program: SBIR
Awards Year: 1993
Solitcitation Year: N/A
Solitcitation Topic Code: N/A
Solitcitation Number: N/A
Small Business Information
Ultramet
12173 Montague Street, Pacoima, CA, 91331
Duns: N/A
Hubzone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Andrew J. Sherman
 (818) 899-0236
Business Contact
Phone: () -
Research Institution
N/A
Abstract
In this Phase I program, Ultramet proposes to demonstrate the feasibility of using a modified solid rocket booster (SRB) to provide the hot gas cranking and ignition source for starting a small turbojet sustainer engine, in addition to boost propulsion. This SRB-based starting system would replace the pyrotechnic starter cartridge currently used as a gas generator and ignition source for the sustainer engine, thereby reducing both the cost and weight of the total system without sacrificing performance. The primary difficulties involved are fivefold: reducing the 5000 R, 1500-psia SRB flame to conditions that will not damage the turbine rotor; maintaining sufficient gas velocity, pressure, and mass flow to the impingement nozzles to successfully start the engine, taking into consideration pressure losses due to gas cooling and frictional effects; demonstrating materials of construction capable of surviving th erosive, high temperature propellant gas; modifying the SRB to account for pressure and heat losses due to gas diversion; and possibly filtering carbon, alumina, and other condensible matter from the hot gas stream before its introduction into the turbine section. This program will demonstrate a workable design capable of surmounting these obstacles through theoretical calculations and hardware demonstration of a SRB-based starter system.

* information listed above is at the time of submission.

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