COMPUTER SIMULATION OF TRANSIENT OPERATION OF SMALL BIPROPELLANT ENGINES

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: N/A
Agency Tracking Number: 11978
Amount: $49,966.00
Phase: Phase I
Program: SBIR
Awards Year: 1990
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Ergo-tech Systems, Inc.
6937 Estepa Drive, Tujunga, CA, 91042
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Jose E. Chirivella
 Principal Investigator
 (818) 352-1759
Business Contact
 JOSE E. CHIRIVELLA
Title: PRESIDENT
Phone: (818) 352-1759
Research Institution
N/A
Abstract
A COMPUTER CODE (SIMULTRAN) IS TO BE DEVELOPED THAT, BY SIMULATING THE TRANSIENT OPERATION OF THE PROPULSION SYSTEM,WILL CALCULATE THE CONTAMINANT PROPERTIES AT THE NOZZLE EXIT-LANE. THE INTENDED USER FOR THE SIMULATOR IS THE ENGINEER WITH A BACKGROUND IN PROPULSION. USEE INTERFACE AND OUTPUT MANAGEMENT IS PROVIDED BY AN EXPERT SYSTEM. EXISTING TRANSIENT CODES WILL BE MODIFIED, IMPROVED AND INTEGRATED; A UNIQUE FEATURE OF THE PROGRAM IS THAT THE CHAMBER PHENOMENA ARE SIMULATED FROM RAREFIED REGIME TO STEADY-STATE CONDITIONS. PRESENT TECHNIQUES TO PREDICT CONTAMINATION FROM SMALL BIPROPELLANT ENGINES ARE DEFICIENT,REQUIRE ADVANCED EXPERTISE, AND LACK EXPERIMENTAL VERIFICATION. THE SIMULATOR CAN ALSO BE EMPLOYED TO DEVELOP STABILITY RATING CRITERIA AND TRANSIENT PERFORMANCE SPECIFICATIONS. PHASE I WILL ESTABLISH THE OPERATIONAL ASPECTS OF THE SIMULATOR AND THE FEASIBILITY OF THE APPROACH WILL BE DEMONSTRATED WITH TWO SAMPLE CASES. IN PHASE II, THE CODE WILL BE UPGRADED TO SIMULATE 3-DIMENSIONAL TWO-PHASE FLOW, AND EXPERIMENTAL WORK WILL BE CONDUCTED TO VERIFY INJECTOR FLOW DYNAMICS. THE TRANSIENT BURNING OF PROPELLANT DROPLETS WILL BE VERIFIED IN A SMALL VERTICAL SHOCK TUBE FACILITY. IN PHASE III, ERGO-TECH WILL USE THE CAPABILITIES FROM THIS EFFORT TO DEVELOP THE SPECIFICATIONS FOR A TEST STANDARDIZATION TO CHARACTERIZE SMALL BIPROPELLANT ENGINES.

* information listed above is at the time of submission.

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