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Modeling Heat Mitigation in Hollow-Core Gas Fiber Lasers With Gas Flow | IEEE Journals & Magazine | IEEE Xplore

Abstract:

We carry out a computational study to evaluate the temperature reduction by using gas flow in hollow-core gas fiber lasers. We first use the Navier-Stokes equations to st...Show More

Abstract:

We carry out a computational study to evaluate the temperature reduction by using gas flow in hollow-core gas fiber lasers. We first use the Navier-Stokes equations to study the gas flow in the hollow-core fibers. We compare the density, pressure, and velocity using both an incompressible and a compressible gas model. We show that an incompressible gas model leads to large errors in the case that we study in this paper. We then present a coupled model to study gas flow and heat transfer simultaneously in hollow-core fibers using a compressible gas model. We found that a temperature reduction of about 20% can be achieved by using a differential pressure of 10 atm between the inlet and outlet of the hollow-core fibers. The results also demonstrate that the relative temperature reduction increases when the heat power decreases, the fiber length decreases, and the heat profile is more localized.
Article Sequence Number: 0900308
Date of Publication: 02 August 2024

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