Abstract
A fast computational method for simulating the evolution of the burning surface of a complex, three-dimensional solid rocket motor (SRM) propellant grain has been developed using a signed minimum distance function (MDF). The resulting code (Rocgrain) allows motor grain design by user-friendly commercial computer-aided-design (CAD) programs. The MDF is calculated using stereo-lithography surface information from the CAD file and propellant surface burnback is simulated by manipulation of the initial MDF. Variable time stepping and multiple spatial grids further reduce computation time requirements. Results indicate this method to give adequate accuracy with acceptable computation time for time scales of the full motor burn. This enables a single geometric tool to be used for describing the propellant grain geometry for both grain design and internal flowfield analysis. The Rocgrain code can be coupled with a variety of flowfield physics modules ranging in complexity from simple zero-dimensional to more sophisticated CFD analysis (e.g., nonlinear acoustic instability).
Original language | English (US) |
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State | Published - 2005 |
Event | 41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit - Tucson, AZ, United States Duration: Jul 10 2005 → Jul 13 2005 |
Other
Other | 41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit |
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Country/Territory | United States |
City | Tucson, AZ |
Period | 7/10/05 → 7/13/05 |
ASJC Scopus subject areas
- Aerospace Engineering
- Control and Systems Engineering
- Electrical and Electronic Engineering