Use of schlieren methods to study gas flow in laser technology

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F16%3APU144075" target="_blank" >RIV/00216305:26210/16:PU144075 - isvavai.cz</a>
Result on the web
<a href="https://www.researchgate.net/publication/309961266_Use_of_schlieren_methods_to_study_gas_flow_in_laser_technology" target="_blank" >https://www.researchgate.net/publication/309961266_Use_of_schlieren_methods_to_study_gas_flow_in_laser_technology</a>
DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Use of schlieren methods to study gas flow in laser technology
Original language description
Laser technologies such as welding and cutting rely on process gases. We suggest to use schlieren imaging to visualize the gas flow during these processes. During the process of laser welding, the shielding gas flows to the welded area to prevent oxidation of the weld pool by surrounding air. The gas also interacts with hot plasma spurting from the key hole induced by the laser beam incident on the molten material. This interaction is quite complicated because hot plasma mixes with the cold shielding gas while the system is moving along the weld. Three shielding gases were used in the presented experiment: Ar, He and N-2. Differences in dynamics of the flow are clearly visible on schlieren images. Moreover, high speed recording reveals a structure consisting of hot gas bubbles. We were also able to determine the velocity of the bubbles from the recording. During laser cutting, the process gas flows coaxially with the laser beam from the nozzle to remove the molten material out of the kerf. The gas flo
Czech name
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Czech description
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Project
<a href="/en/project/TA04020456" target="_blank" >TA04020456: The development of new types of solar absorbers</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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