Numerical simulation of gas powder flow in laser cladding with coaxial powder feeding

Dong Gan; Liu Jichang; Li Yuanyuan

doi:10.3788/HPLPB20132508.1951

Volume 25 Issue 08

Nov. 2013

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Dong Gan, Liu Jichang, Li Yuanyuan. Numerical simulation of gas powder flow in laser cladding with coaxial powder feeding[J]. High Power Laser and Particle Beams, 2013, 25: 1951-1955. doi: 10.3788/HPLPB20132508.1951

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Dong Gan, Liu Jichang, Li Yuanyuan. Numerical simulation of gas powder flow in laser cladding with coaxial powder feeding[J]. High Power Laser and Particle Beams, 2013, 25: 1951-1955. doi: 10.3788/HPLPB20132508.1951

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Numerical simulation of gas powder flow in laser cladding with coaxial powder feeding

doi: 10.3788/HPLPB20132508.1951

1.
State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body,Hunan University,Changsha 410082,China

Received Date: 2012-12-03
Rev Recd Date: 2013-03-08
Publish Date: 2013-06-19

Abstract

Abstract

The discrete phase module in FLUENT is used to build the two-dimensional model of gas-powder flow. The impacts of the amounts of shielding gas, transporting gas and fed powder on the concentration field and velocity field distribution, divergence angle and the focus of powder flow are discussed. The calculated results show that with increase in transporting gas flux, the powder velocity increases and the gas-powder flows divergence angle decreases, and with increase in powder feed amount, the gas-powder flows focus moves down a little and the powder concentration at this focus increases. At the same values of the process parameters as in the calculation, the camera is used to take photos of the powder flow distribution. It is shown that the experimental results agree well with the computational results.
- laser cladding,
- coaxial powder feeding,
- gas-powder flow,
- numerical simulation

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