A Geometry-Grid Generation Template Framework for Propellant Delivery System

Shih, Alan M.; Ross, Douglass H.; Dillavou, Marcus; Gopalsamy, Sankarappan; Soni, Bharat K.

doi:10.2514/6.2006-5045

Cited by 3 publications

(2 citation statements)

References 10 publications

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“…In the present study, various flow element geometries were simulated, such as different flow channel diameters, with and without a coating layer in the solid core, and different flow channel lengths. A geometry/grid template was developed based on MiniCAD [25][26][27] to expedite the geometry and grid generation process by allowing the user to interactively change 1) the ratio of the gap between flow channels to the diameter of the flow channel, 2) the ratio of the size of the flow element to the diameter of the flow channel, 3) thickness of the coating layer, and 4) the length of the flow element. The procedures of using MiniCAD to generate geometries and solid meshes are detailed in Ref.…”

Section: Numerical Meshesmentioning

confidence: 99%

Numerical Study of Single Flow Element in a Nuclear Thermal Thrust Chamber

Gc¹,

Ito²,

Yen-Sen³

et al. 2015

J Aeronaut Aerospace Eng

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The objective of this study was to develop an efficient and accurate computational methodology to predict detailed thermo-fluid environments of a single flow element in a hypothetical solid-core nuclear thermal thrust chamber assembly. Several numerical and multi-physics thermo-fluid models, such as chemical reactions, turbulence, conjugate heat transfer, porosity, and power generation, were incorporated into an unstructured-grid, pressure-based computational fluid dynamics solver used in this investigation. A secondary objective was to develop a porosity model for simulation of the whole solid-core nuclear thermal engine without resolving thousands of flow channels inside the solid core. Detailed numerical simulations of a single flow element with different power generation profiles were conducted to investigate the root cause of a phenomenon called mid-section corrosion that severely damaged the flow element assembly of early solid-core reactors. Under the assumptions employed in this effort and for the first time, the result demonstrated flow choking in the flow element. The possibility of flow choking in part of the flow element indicated a potential coolant mass flow imbalance, which could lead to a high local thermal gradient in coolant-starved flow elements and possibly the eventual mid-section corrosion.

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Section: Numerical Meshesmentioning

confidence: 99%

Numerical Study of Single Flow Element in a Nuclear Thermal Thrust Chamber

Gc¹,

Ito²,

Yen-Sen³

et al. 2015

J Aeronaut Aerospace Eng

View full text Add to dashboard Cite

show abstract

“…A geometry-grid generation template tool, MiniCAD [18], has been developed to address the need to produce a large number of grids in a timely manner for parametric design study. It provides relatively sophisticated CAD capabilities that are generally not available in a grid generation tool.…”

Section: Parametric Grid Generatormentioning

confidence: 99%

Development of an efficient aerodynamic shape optimization framework

Kim

Rao

Koomullil

et al. 2009

Mathematics and Computers in Simulation

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Numerical Simulations of Single Flow Element in a Nuclear Thermal Thrust Chamber

Cheng

Ito

Ross

et al. 2007

39th AIAA Thermophysics Conference

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The objective of this effort is to develop an efficient and accurate computational methodology to predict both detailed and global thermo-nuid environments of a single now element in a hypothetical solid-core nuclear thermal thrust chamber assembly, Several numerical and multi-physics thermo-fluid models, such as chemical reactions, turbulence, conjugate heat transfer, porosity, and power generation, were incorporated into an unstructured-grid, pressure-based computational fluid dynamics solver. The numerical simulations of a single now element provide a detailed thermo-fluid environment for thermal stress estimation and insight for possible occurrence of mid-section corrosion. In addition, detailed conjugate heal transfer simulations were employed to develop the porosity models for efficient pressure drop and thermal load calculations.

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A Geometry-Grid Generation Template Framework for Propellant Delivery System

Cited by 3 publications

References 10 publications

Numerical Study of Single Flow Element in a Nuclear Thermal Thrust Chamber

Numerical Study of Single Flow Element in a Nuclear Thermal Thrust Chamber

Development of an efficient aerodynamic shape optimization framework

Numerical Simulations of Single Flow Element in a Nuclear Thermal Thrust Chamber

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