Numerical Simulation of Flow Field in Air-Jet Loom Main Nozzle

Author:

He Shanshan1,Qian Yi1,Xue Wenliang1,Cheng Longdi1

Affiliation:

1. Key Laboratory of Textile Science & Technology , Ministry of Education , Donghua University , Shanghai 201620 , China

Abstract

Abstract To improve airflow injection capacity of the main nozzle and decrease backflow phenomenon, a new main nozzle structure with two throats is designed. Negative pressure value and negative pressure zone length are first proposed evaluating the strength of backflow phenomenon. Commercial computational fluid dynamic (CFD) code “Fluent” is performed to simulate the flow field inside and outside the main nozzle. Exit velocity increases about 10 m/s in new main nozzle. Airflow core length of the new main nozzle is 35% higher than that of commonly used main nozzle. Smaller negative pressure value and shorter negative pressure zone length mean a weaker backflow phenomenon in the new main nozzle. Bigger air drag force indicates stronger weft insertion ability in the new main nozzle.

Publisher

Walter de Gruyter GmbH

Subject

General Materials Science

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