Characteristics and Application to Manufacturing Technique of Spiral Jets

螺旋射流的特点及其在制造技术中的应用

• 批准号: 10650177
• 负责人: SUDOU Kouzou
• 金额: $ 1.6万
• 依托单位: Hiroshima University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10650177/
• 关键词: Jet; Nozzle; Velocity Distribution; Pressure Distribution; Turbulence; Diffusion; Hot-wire; Rotating Probe Technique; 回転プローブ法

1. Contents of research made in 1998-1999(1)Nozzles of seven types affected to fluid characteristics of spiral jet have been made.(2)The distributions of velocity and static pressure Issuing from each nozzle are measured and jet characteristics are investigated.(3)In case of swirling jet issuing from taper nozzle, flow visualization and velocity measurement have been carried out and jet characteristics have been Investigated.2. Results obtained In 1998-1999(1)In case of the jet issuing from taper nozzle, static pressure on the nozzle axis at the nozzle exit becomes higher with an increase of taper angle. Downstream static pressure falls down rapidly and pressure gradient becomes steeper with an increase of taper angle.(2)In case of the jet Issuing from taper nozzle, the fluid is accelerated near the nozzle exit and its degree of acceleration becomes larger with an increase of taper angle.(3)In case of the jet with swirl issuing from taper nozzle, jet width becomes wider with an increase of taper angle.(4)In case of the jet with swirl issuing from tapered nozzle, Reynolds stress becomes larger with an Increase of taper angle and accordingly the turbulent diffusion becomes more marked with an increase of taper angle.

1. 1998-1999年的研究内容：（1）研究了影响螺旋射流流体特性的七种喷嘴类型。（2）测量了各喷嘴出口的速度分布和静压分布，研究了射流特性。(3)In以锥形喷嘴产生的旋转射流为例，进行了流动显示和速度测量，研究了射流特性. 1998-1999年的研究结果：（1）对于锥形喷嘴，随着锥角的增大，喷嘴出口处喷嘴轴上的静压增大;随着锥角的增大，下游静压福尔斯迅速下降，压力梯度变陡。(2)In对于锥形喷嘴射流，流体在喷嘴出口附近加速，且加速程度随锥角的增大而增大。(3)In对于锥形喷嘴产生的旋流射流，射流宽度随锥角的增大而变宽。(4)In对于锥形喷嘴产生的旋流射流，随着锥角的增大，雷诺应力增大，湍流扩散也随之增大。

项目成果

Kozo SUDO: "Effect of the Nozzle Shape on Axisymmetric Jet"Proc. of Jpn. Soc. Mech. Eng.. 995-1. 161-162 (1999)

Kozo SUDO：“喷嘴形状对轴对称射流的影响”Proc。

Kozo SUDO: "Effect of the Nozzle Shape on Axisymmetric Jet"Proc. of Jpn. Soc. Mech. Eng.. 994-2. 5-17-5-18 (1999)

Kozo SUDO：“喷嘴形状对轴对称射流的影响”Proc。

須藤浩三: "壁面に衝突する旋回噴流" 日本機械学会講演論文集. (発表予定).

Kozo Sudo：“旋转喷射与墙壁碰撞”日本机械工程师学会会议记录（待提交）。

須藤 浩三: "軸対称噴流に及ぼすノズル形状の影響"日本機械学会講演論文集. 995・1. 161-162 (1999)

Kozo Sudo：“喷嘴形状对轴对称射流的影响”日本机械工程师学会会议记录 995・1（1999）。

須藤 浩三: "壁面の衝突する旋回噴流"日本機械学会講演論文集. 993・1. 329-330 (1999)

Kozo Sudo：“旋转喷射与墙壁碰撞”日本机械工程师学会会议记录993・1（1999）。