Velocity fluctuation of weft in an air jet loom. Measurement with a laser-Doppler Velocimeter.
نویسندگان
چکیده
منابع مشابه
Simulation Model for Weft Yarn Motion in a Single-Nozzle Air-Jet Loom
Air-jet weaving is an advanced weaving method with high efficiency and productivity. It is one of the most widely used methods of weaving in the world. In air-jet filling insertion, the motion of weft yarn is caused by friction between weft yarn and air blown through nozzle. After declamping and subjecting the yarn to air stream, its motion is not active but very complicated and influenced by ...
متن کاملSimulation Model for Weft Yarn Motion in a Single-Nozzle Air-Jet Loom
Air-jet weaving is an advanced weaving method with high efficiency and productivity. It is one of the most widely used methods of weaving in the world. In air-jet filling insertion, the motion of weft yarn is caused by friction between weft yarn and air blown through nozzle. After declamping and subjecting the yarn to air stream, its motion is not active but very complicated and influenced by ...
متن کاملCalibration of the CERTIFIER Air Velocity Calibrator Using a Laser Doppler Velocimeter (LDV)
Introduction Traditionally a Pitot-static tube connected to a pressure transducer is used to make air velocity measurement. Lately, velocity transducers based on the principle of convective heat transfer have become popular. Both types of transducers need occasional calibrations. Also, several regulatory agencies require that the calibration of velocity transducers used in certain applications ...
متن کاملsimulation model for weft yarn motion in a single-nozzle air-jet loom
air-jet weaving is an advanced weaving method with high efficiency and productivity. it is one of the most widely used methods of weaving in the world. in air-jet filling insertion, the motion of weft yarn is caused by friction between weft yarn and air blown through nozzle. after declamping and subjecting the yarn to air stream, its motion is not active but very complicated and influenced by s...
متن کاملMeasurement of Reynolds Stress Distribution in a Fluidic Element by the Laser Doppler Velocimeter
The one-phase flow and the two-phase flow in a fluidic element are investigated by measuring Reynolds stress distributions of the main jets using the laser Doppler velocimeter. In the one-phase flow, a water flow jets from a main nozzle into water and in the two-phase flow, a water fiow jets into air. Some results with the one-phase flow are as follows. When either of the two control ports is c...
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ژورنال
عنوان ژورنال: Sen'i Kikai Gakkaishi (Journal of the Textile Machinery Society of Japan)
سال: 1991
ISSN: 0371-0580,1880-1994
DOI: 10.4188/transjtmsj.44.2_t32