On the parallelization of a three-dimensional 'real gas' flow solver

Abstract Considering the thermodynamical fluid mechanics in the gain medium and laser kinetic processes, a three-dimensional theoretical model of an exciplex-pumped Cs vapor laser with longitudinal and transverse gas flow is established. The slope efficiency of laser calculated by the model shows good agreement with the experimental data. The comprehensive three-dimensional distribution of temperature and particle density of Cs is depicted. The influence of pump intensity, wall temperature, and fluid velocity on the laser output performance is also simulated and analyzed in detail, suggesting that a higher wall temperature can guarantee a higher output laser power while causing a more significant heat accumulation in the cell. Compared with longitudinal gas flow, the transverse flow can improve the output laser power by effectively removing the generated heat accumulation and alleviating the temperature gradient in the cell.

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Thermally induced rarefied gas flow in a three-dimensional enclosure with square cross-section

Physical Review Fluids ◽

10.1103/physrevfluids.2.123402 ◽

2017 ◽

Vol 2 (12) ◽

Cited By ~ 5

Author(s):

Lianhua Zhu ◽

Xiaofan Yang ◽

Zhaoli Guo

Keyword(s):

Cross Section ◽

Gas Flow ◽

Rarefied Gas ◽

Three Dimensional ◽

Rarefied Gas Flow ◽

Thermally Induced

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Analysis of a Virtual Prototype First-Stage Rotor Blade Using Integrated Computer-Based Design Tools

Volume 4: Fatigue and Fracture, Heat Transfer, Internal Combustion Engines, Manufacturing, and Technology and Society ◽

10.1115/esda2006-95257 ◽

2006 ◽

Cited By ~ 1

Author(s):

Michel Arnal ◽

Christian Precht ◽

Thomas Sprunk ◽

Tobias Danninger ◽

John Stokes

Keyword(s):

Heat Transfer ◽

Gas Flow ◽

Thermal Loading ◽

Cfd Simulation ◽

Three Dimensional ◽

Life Assessment ◽

Element Analysis ◽

Pressure Losses ◽

Cooling Channels ◽

Internally Cooled

The present paper outlines a practical methodology for improved virtual prototyping, using as an example, the recently re-engineered, internally-cooled 1st stage blade of a 40 MW industrial gas turbine. Using the full 3-D CAD model of the blade, a CFD simulation that includes the hot gas flow around the blade, conjugate heat transfer from the fluid to the solid at the blade surface, heat conduction through the solid, and the coolant flow in the plenum is performed. The pressure losses through and heat transfer to the cooling channels inside the airfoil are captured with a 1-D code and the 1-D results are linked to the three-dimensional CFD analysis. The resultant three-dimensional temperature distribution through the blade provides the required thermal loading for the subsequent structural finite element analysis. The results of this analysis include the thermo-mechanical stress distribution, which is the basis for blade life assessment.

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