Relay Nozzles and Weaving Reed

Adámek, Karel

doi:10.11648/j.ijmea.s.2015030101.13

Cited by 4 publications

(3 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The highly underexpanded character of the jet was indeed confirmed in the simulations. The typical ''shock cells'' can also be observed in the simulations of Adamek et al 25 and Osman. 26 In this section some aspects of the highly underexpanded jet and its simulation using CFD are discussed because of their relevance to the current research.…”

Section: Relay Nozzle Jetmentioning

confidence: 62%

See 1 more Smart Citation

Towards simulation of force and velocity fluctuations due to turbulence in the relay nozzle jet of an air jet loom

Delcour

Langenhove

Degroote

2020

Textile Research Journal

View full text Add to dashboard Cite

This research was aimed at obtaining a first estimation of the effect of turbulent vortices present in the relay nozzle jets of an air jet loom on the weft. To this end a large eddy simulation (LES) model was set up and validated capable of simulating a highly underexpanded jet up to a point sufficiently far from the nozzle exit such that flow features at the weft location could be analyzed. The quality of the LES was evaluated based on several quality criteria as well as by comparing the results with experiments and data from the literature. The results show that for a free jet substantial velocity fluctuations are present at a representative yarn location. By inserting a rigid cylinder at this location, the corresponding force fluctuations on a smooth yarn were also obtained. The research shows that the unsteadiness in the jet is quite substantial, as are the corresponding force fluctuations. These fluctuations could have a profound impact on the yarn motion and should at least be considered when using numerical tools to evaluate the forces on or the motion of a yarn acted on by a relay nozzle jet.

show abstract

Section: Relay Nozzle Jetmentioning

confidence: 62%

“…The highly underexpanded character of the jet was indeed confirmed in the simulations. The typical "shock cells" can also be observed in the simulations of Adamek, Karel, Kolar et al 25 and Osman 26 .…”

Section: The Relay Nozzle Jetmentioning

confidence: 65%