| Budget Amount *help |
¥3,920,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥420,000)
Fiscal Year 2007: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2006: ¥2,100,000 (Direct Cost: ¥2,100,000)
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| Research Abstract |
1. We tried to manufacture the air suction guns with various geometry parameters and measured the yarn suction Throe and air mace flow rate by using then air suction guns. As the results, the effect of the air suction gun geometries on the yarn suction three and the air mass flow rate was cleared. For example, the compressed-air inflow angle and converging angle of the de Laval tube mainly had effects on the yam suction efficiency. While, the passage diverging angle, the throat diameter of the de Laval tube and the yam propulsion is the length had few effects on the yarn suction farce.
2. We tried to take the photographs of the running yarn postures in an air suction gun by using the air suction gun made of dear acrylic, and analyze quantitatively these yam postures. As the results, the effect of the air suction gin geometries on the avenge yarn diameter, which is the diameter of a spiral shape of the yarn pasture and the average yarn pitch, which is the pitch of a spiral shape of the y
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arn posture, was dewed. For example, the compressed-air inflow angle and the throat diameter of the de Laval tube had the influence on the average yam diameter and the average yam pitch. While, the converging angle of the de Laval tube had hardly influence on the average yam diameter and the pitch.
3. We carried out the air flow simulation in an air suction gun by using the calculation model referred to the obtained results in this study. As the results, the whole air flow states in the air suction gun were cleared. For example, (1) an air vacuumed from the yam inhalant tube flowed spirally in the de Laval tube and the straight tile, (2) The air flow in an air suction gun was large near the tube wall, and the air flow near the wall would have the influence on the yarn suction force.
4. We considered the time course of running yam postures in the air suction gun by using the high speed camera. The used air suction gun geometries were optimized from the calculation results. As the results, the frequency of the trajectory of running yarn spirally in the air suction gun decreased with an increase of the supplied air pressure, and the residence time, that is the time for the running yarn to pass in the air suction gun, alga decreased with the increase tithe supplied air pressure.
5. As the results, we concluded the design manuals of the air suction gun with the energy saving and the high performance based on the fluid engineering. Less
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