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Christian Diegel, Thorsten Mattulat, Klaus Schricker, Leander Schmidt, Thomas Seefeld, Jean Pierre Bergmann and Peer Woizeschke
Background. Spatter formation at melt pool swellings at the keyhole rear wall is a major issue for laser deep penetration welding at speeds beyond 8 m/min. A gas nozzle directed towards the keyhole, that supplies shielding gas locally, is advantageous in...
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Xuezhen Wu, Gaoqiang Guo, Hongyu Ye, Yuanbing Miao and Dayong Li
The horizontal well technology was successfully applied in the Chinese second natural gas hydrate (NGH) field test in the Shenhu area of the South China Sea in 2020. However, the results show that the threshold for commercial exploitation has not been br...
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Giuseppe Pezzinga
Water hammer flow is examined, putting into evidence that unsteady friction cannot be fully responsible for observed oscillation damping. The measured piezometric head oscillations of water hammer flow experimental tests carried out for very long time (a...
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Khaled Jarrah, Yazen Alali, Alyssa Lalko and Osamah Rawashdeh
Drones have evolved rapidly over the decades, but the limited flight time inhibits multirotor drones from performing long-duration tasks. Batteries that power drones are considered an inadequate power source due to their low energy density. As gasoline i...
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Luigi Nele, Giulio Mattera and Mario Vozza
Welding is one of the most complex industrial processes because it is challenging to model, control, and inspect. In particular, the quality inspection process is critical because it is a complex and time-consuming activity. This research aims to propose...
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