Abstract
It is of great significance to study and improve the performance of sub-ozzles used at air jet looms in orderto save energy. In the present study, the velocity distribution of jet flow from currently-sed sud-ozzles aremeasured and analyzed to make clear its characteristics.
Velocity measurement is made for four sorts of commercial sub-ozzles with different outlet shapes, such ascirculdr, porous, rectangular and elliptic shapes. It shows clearly that the decaying characteristics of jet fromfrom sub-ozzles do not depend on the outlet shapes and are similar to that of axisymmetric jet flow flom acircular tube nozzle. Furthermore, because the jet angle changes with supplied air pressure, it should benecessary to adjust the set-up angle and position of the sub-ozzle according to the air pressure. Finally, it canbe seen from the experiment that the porous sub-ozzle performs best among the four kinds.
