Estimation of Mechanical Erosion at Nozzle Inlet by Multi-phase Flow Simulation in Solid Rocket Motor Considering Aluminium Droplets and Alumina Mist.

2007 ◽  
Author(s):  
Kazuma Kato ◽  
Kazuyuki Ueno ◽  
Keisuke Sawada
Keyword(s):  
Flow Simulation ◽  
Rocket Motor ◽  
Phase Flow ◽  
Solid Rocket Motor ◽  
Multi Phase Flow ◽  
Mechanical Erosion ◽  
Solid Rocket ◽  
Multi Phase ◽  
Nozzle Inlet

Accurate Multi-Phase Flow Simulation in Faulted Reservoirs Using Mimetic Finite Difference Methods on Polyhedral Cells

2021 ◽  
Author(s):  
Rencheng Dong ◽  
Faruk O. Alpak ◽  
Mary F. Wheeler
Keyword(s):  
Hybrid Method ◽  
Corner Point ◽  
Flow Simulation ◽  
Phase Flow ◽  
Reference Solution ◽  
Pressure Equation ◽  
Discretization Methods ◽  
Multi Phase Flow ◽  
Polyhedral Cells ◽  
Multi Phase

Abstract Faulted reservoirs are commonly modeled by corner-point grids. Since the two-point flux approximation (TPFA) method is not consistent on non-orthogonal grids, multi-phase flow simulation using TPFA on corner-point grids may have significant discretization errors if grids are not K-orthogonal. To improve the simulation accuracy, we developed a novel method where the faults are modeled by polyhedral cells, and mimetic finite difference (MFD) methods are used to solve flow equations. We use a cut-cell approach to build the mesh for faulted reservoirs. A regular orthogonal grid is first constructed,and then fault planes are added by dividing cells at fault planes. Most cells remain orthogonal while irregular non-orthogonal polyhedral cells can be formed with multiple cell divisions. We investigated three spatial discretization methods for solving the pressure equation on general polyhedral grids, including the TPFA, MFD and TPFA-MFD hybrid methods. In the TPFA-MFD hybrid method, the MFD method is only applied to part of the domain while the TPFA method is applied to rest of the domain. We compared flux accuracy between TPFA and MFD methods by solving a single-phase flow problem. The reference solution is obtained on a rectangular grid while the same problem is solved by TPFA and MFD methods on a grid with distorted cells near a fault. Fluxes computed using TPFA exhibit larger errors in the vicinity of the fault while fluxes computed using MFD are still as accurate as the reference solution. We also compared saturation accuracy of two-phase (oil and water) flow in faulted reservoirs when the pressure equation is solved by different discretization methods. Compared with the reference saturation solution, saturation exhibits non-physical errors near the fault when pressure equation is solved by the TPFA method. Since the MFD method yields accurate fluxes over general polyhedral grids, the resulting saturation solutions match the reference saturation solutions with an enhanced accuracy when the pressure equation is solved by the MFD method. Based on the results of our simulation studies, the accuracy of the TPFA-MFD hybrid method is very close to the accuracy of the MFD method while the TPFA-MFD hybrid method is computationally cheaper than the MFD method.

Flow Inside a Solid Rocket Motor with Relation to Nozzle Inlet Ablation

AIAA Journal ◽  
2007 ◽  
Vol 45 (6) ◽  
pp. 1324-1332 ◽  
Author(s):  
Toru Shimada ◽  
Masumi Sekiguchi ◽  
Nobuhiro Sekino
Keyword(s):  
Rocket Motor ◽  
Solid Rocket Motor ◽  
Solid Rocket ◽  
Nozzle Inlet

Coupled Fluid, Thermal and Structural Analysis of Nozzle in Solid Rocket Motor

2013 ◽  
Vol 482 ◽  
pp. 297-301
Author(s):  
Lin Sun ◽  
Fu Ting Bao ◽  
Wei Shi ◽  
Hao Xu
Keyword(s):  
Structure Analysis ◽  
Frictional Coefficient ◽  
Flow Simulation ◽  
Rocket Motor ◽  
Von Mises Stress ◽  
Analysis Model ◽  
Solid Rocket Motor ◽  
Solid Rocket ◽  
Von Mises ◽  
Transient Thermal

A coupled fluid, thermal and structure analysis model was established for solid rocket motor nozzle. Based on a steady flow simulation and a transient thermal simulation, a transient structure analysis simulation was executed. The model took a frictional coefficient 0.3 into account to simulate a rub action between the parts of the nozzle. Result showed that with a frictional coefficient, Von Mises stress could be released which gives a constructive recommendation for a structure simulation of a nozzle. Also, the model was more close to the actual. A more dependable approach was introduced and it could contribute to designing department.

Cold-flow simulation and CFD modeling of the Space Shuttle solid rocket motor nozzle joints

1999 ◽  
Author(s):  
Brian Laubacher ◽  
Andrew Eaton ◽  
Robert Pate ◽  
Qunzhen Wang ◽  
Edward Mathias ◽  
...  
Keyword(s):  
Space Shuttle ◽  
Flow Simulation ◽  
Rocket Motor ◽  
Cfd Modeling ◽  
Solid Rocket Motor ◽  
Cold Flow ◽  
Solid Rocket
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