DYNAMIC CONTROL OF INSTABILITIES WITHIN LIQUID ROCKET ENGINES - FEASIBILITY STUDY

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: N/A
Agency Tracking Number: 3981
Amount: $247,903.00
Phase: Phase II
Program: SBIR
Awards Year: 1987
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Hersh Acoustical Engineering I
9545 Cozycroft Ave, Chatsworth, CA, 91311
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Alan S Hersh
 (818) 998-8311
Business Contact
Phone: () -
Research Institution
N/A
Abstract
A RESEARCH PROGRAM IS PROPOSED TO ASSESS THE FEASIBILITY OF DESIGNING AN ADAPTIVE FEEDBACK CONTROL SYSTEM TO DYNAMICALLY TUNE ACOUSTIC CAVITIES FOR MAXIMUM DAMPING OF UNSTABLE PRESSURES WITHIN LIQUID ROCKET ENGINES OVER ITS OPERATIONAL RANGE FROM IGNITION TO SHUTOFF. THE RESEARCH EFFORT IS DIVIDED INTO FOUR PARTS. FIRST, A THOROUGH LITERATURE REVIEW WILL BE CONDUCTED TO DETERMINE THE STATEOF-THE-ART IN THE DESIGN OF ACOUSTIC CAVITIES. SECOND, THE RANGE OF CAVITY IMPEDANCES REQUIRED TO ACHIEVE MAXIMUM DAMPING OF ALL EXCITED MODES WITHIN A TYPICAL ENGINE WILL BE DETERMINED. THIRD, CANDIDATE ADAPTIVE FEEDBACK CONTROL SYSTEMS WILL BE PROPOSED AND FOURTH, THEIR FEASIBILITY ASSESSED IN TERMS OF THEIR ABILITY TO SURVIVE IN THE HOSTILE ENVIRONMENT WITHIN LIQUID ROCKET ENGINES.

* information listed above is at the time of submission.

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