Study on flow characteristics and diffusion phenomena of doublet flow by using image processing method

利用图像处理方法研究双峰流的流动特性和扩散现象

• 批准号: 11650183
• 负责人: NOZAKI Tsutomu
• 金额: $ 2.37万
• 依托单位: Kagoshima University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11650183/
• 关键词: Flow control; Jet; Particle Image Velocimetry; Diffusion; Turbulent flow; Impinging jet; Heat transfer; Heat transfer enhancement

(1) As a fundamental experiment on a doublet flow, the effects of injection velocity and the ratio of injection to suction on the flow were investigated. By using the PIV, the mean value of fluctuating velocity was found from its time mean value in the measuring section and the predicted equation is proposed by the velocity ratio and the diameter ratio. These are obtained from the conditions at the constant injection velocity and diameter. It was found that there exists a similarity of the flow at the same velocity ratio and the diameter ratio.(2) As an advanced experiment, the improvement of heat transfer and the reduction suction flow rate are investigated. For the former, it was clarified that the increase of the fluctuating velocity obtained by the fundamental experiment contributes to the heat transfer. From the results of the coefficient of heat transfer measured, the effectiveness of the doublet flow is confirmed. For the later, in order to reduce the suction flow, it is proposed to attach the suction pipe made longer. By making the suction pipe longer, it was clarified the above mentioned reduced suction flow can be obtained.

（1）作为对双重流动流的基本实验，研究了注射速度的影响以及注射速度与吸力对流动的比率。通过使用PIV，从测量部分中发现了波动速度的平均值，并且预测方程是由速度比和直径比提出的。这些是从恒定注入速度和直径下的条件中获得的。发现在相同速度比和直径比以相同的速度比率上存在相似性。（2）作为高级实验，研究了热传递的改善和还原吸力流量。对于前者，澄清说，通过基本实验获得的波动速度的增加有助于传热。从测得的传热系数的结果中，确认了双重流动流的有效性。对于后来，为了减少吸气流，建议将吸气管连接起来更长的吸力管。通过使吸入管更长，可以澄清上述吸力流量。

项目成果

福原 稔: "環状吸込流を付加した円形自由噴流の流動特性(噴射速度の影響)"可視化情報. 19・1. 235-238 (1999)

Minoru Fukuhara：“添加环形吸力流的圆形自由射流的流动特性（射流速度的影响）”可视化信息19・1。

Minoru Fukuhara: "Flow and Heat Transfer Characteristics of Circular Impinging Jet Accompanying Annular Suction Flow"Journal of Visualization. 3・4. (2001)

福原稔：“伴随环形吸流的圆形冲击射流的流动和传热特性”可视化杂志3・4。

加藤隆樹: "吹出し口を備えた粉粒体吸込みノズル近傍の流れの可視化(混合比に及ぼすノズル高さの影響)"可視化情報. 20・1. 481-482 (2000)

加藤贵树：“配备出口的粉末吸嘴附近的流动的可视化（喷嘴高度对混合比的影响）”可视化信息20・1（2000）。

Takaki Katoh, Tsutomu Nozaki, Minoru Fukuhara, Atsushi Ohzono and Yoshihumi Saruwatari: "A study of a Particle Suction Nozzle with Injection Prot (Effect of Particle Diameter)"Preprint of the 54th Kyushu Japan Society of Mechanical Engineerings. No.018-1.

Takaki Katoh、Tsutomu Nozaki、Minoru Fukuhara、Atsushi Ohzono 和 Yoshihumi Saruwatari：“具有注射保护的颗粒抽吸喷嘴的研究（颗粒直径的影响）”第 54 届日本九州机械工程学会预印本。

山下英成: "環状吸込流を付加した円形衝突噴流における吸込流量の低減化"日本機械学会九州支部第54期総会・講演会講演論文集. (2001)

山下秀成：“用环形吸流减少圆形撞击射流中的吸流速率”日本机械工程学会九州分会第 54 届全体会议论文集和演讲（2001 年）。