The air jet loom is widely applied in the textile industry due to its high productivity, convenient controllability, high filling insertion rate, low noise and low vibration levels. High-Speed air jet weaves the weft yarn, and transports it through the weft passage. In the present study, a computational fluid dynamics method is applied to solve the incompressible Navier-Stokes equations with one-equation Spalart-Allmaras turbulence model. Which is used to solve the flow filed in a weft passage. The aim of this analysis is to determine the distribution of the flow velocity along the weft passage. Results revealed the strong relationship between air jet velocity and forces on the weft.).

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