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Multiphase Modeling of Solid Rocket Motor Internal Environment

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNX17CM23P
Agency Tracking Number: 170046
Amount: $124,928.00
Phase: Phase I
Program: STTR
Solicitation Topic Code: T1.02
Solicitation Number: N/A
Solicitation Year: 2017
Award Year: 2017
Award Start Date (Proposal Award Date): 2017-06-09
Award End Date (Contract End Date): 2018-06-08
Small Business Information
701 McMillian Way Northwest, Suite D
Huntsville, AL 35806-2923
United States
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Manuel Gale
 Research Engineer
 (256) 726-4800
Business Contact
 Silvia Harvey
Title: Business Official
Phone: (256) 726-4858
Research Institution
 Mississippi State University
 Angie Templeton
133 Etheredge Hall, 449 Hardy Road
Mississippi State, MS 39762-9662
United States

 (662) 325-7404
 Domestic Nonprofit Research Organization

Solid rocket motor (SRM) design requires thorough understanding of the slag accumulation process in order to: predict thrust continuity, optimize propellant conversion efficiency, predict coning effects from sloshing, and assess potential orbital debris (slag) hazard. Current state-of-the-art models for SRM environment do not have the capability to simulate the accumulation and dynamics of slag in SRMs as they rely on a Lagrangian particle approach that is only capable of predicting the location of accumulation. In this STTR effort, CFDRC will team up with Mississippi State University and Tetra Research to develop models for quantifying the effects of slag accumulation and dynamics on SRM performance. To enhance current slag modeling capabilities, an Eulerian-Lagrangian approach to accurately model a slag-phase is proposed, in which Lagrangian particles can be converted to an Eulerian description and vice-versa. The Phase I project aims at developing the basic numerical model for the transport and accumulation of a slag-phase in Loci/CHEM. The multiphase framework, comprising of gas-phase, a dense slag-phase, and Lagrangian particles representing aluminum and alumina, will be developed and demonstrated in the Phase I effort with a TRL starting at 2 and ending at 3. In Phase II, the models will be extended and validated to provide an accurate numerical approach for slag dynamics that incorporates many of the physical phenomena present during SRM operation, including the transfer from Eulerian to Lagrangian description of slag at burnout, increasing the technology readiness level by the end of a Phase II project from 3 to 5.

* Information listed above is at the time of submission. *

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