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管内旋回流の空気・粒子流動特性におよぼす装置・操作条件の影響に関する研究

设备及运行条件对管道内旋流空气及颗粒流动特性影响研究

基本信息

批准号：
09750205
负责人：
中武靖仁
金额：
$ 1.47万
依托单位：
Kurume National College of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Encouragement of Young Scientists (A)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-09750205/
关键词：
旋回流速度分布管内流オリフィス

项目摘要

管内旋回流の空気・粒子流動特性におよぼす装置・操作条件の影響について,内径280mm,全長560mmの供試円筒を用いて実験的に検討をおこなった.装置パラメータとしては旋回羽根角から導かれる供給スワール数ならびに供試円筒中間に設置したオリフィス径(絞り比)であり,それらを変化させて,オリフィス前後における空気流動場を5孔ピト-管により詳細に測定し,装置パラメータと速度べクトル・圧力分布との関係について検討した結果,次の知見を得た.(1)管内旋回流中に設置したオリフィス径,ならびに供給スワール数の大きさにより,オリフィス前後の流れ場が種々変化し,装置条件により逆流・循環領域が形成される.(2)スワール数が大きい場合,強い旋回流が形成され,円筒中心軸と側壁付近との圧力差が大きくなり,逆流領域が形成される.また,スワール数が小さい場合,オリフィス径の影響が少ない.(3)オリフィス径が小さいほど,円筒中心付近の周方向流速が大きくなり,最大周方向流速の半径位置は円筒中心軸に近くなり,逆流領域が形成される.また,オリフィス径が大きいほど,オリフィス前後での速度ベクトル・圧力分布の変化が小さくなる.これらの結果は管内旋回流を利用した装置において,装置条件により,旋回流動場を自由に制御できることを示唆しており,今後さらに詳細な実験と数値シミュレーションを実施し,装置の理論的な最適化をおこなう.

The operating conditions of the airborne particle flow in the tube are very sensitive, the inner diameter is 280mm, and the full-length 560mm is used in the test tube. The equipment is used to cycle the root angle of the feather. The equipment is used to supply the equipment to the equipment in the test tube. The equipment is installed in the test tube. The equipment is installed in the test tube. In the test tube, the air flow field is 5 holes in front and rear, and the air flow field is in front and rear. The device is used to determine the speed force distribution and the results of the experiment. (1) in the circumfluence flow in the tube, the trail diameter is set in the rotary flow, and the equipment is supplied to a large number of runners, and there are several kinds of operation in front and back of the flow. The condition of the device is that the countercurrent is close to the field and the countercurrent field is close. (2) the countercurrent field is close to the countercurrent field. The flow velocity in the circumferential direction is larger than that in the circumferential direction, the maximum circumferential flow velocity in the circumferential direction, the radius position in the circumferential direction, the center of the tube, and the countercurrent field. The speed, speed, force distribution, force distribution, velocity, velocity, force distribution, force distribution, velocity, velocity, force distribution, force distribution, velocity, force distribution, velocity, velocity, force distribution, force distribution, velocity, velocity, force distribution, speed, speed, force distribution, force distribution, speed, speed, force distribution, force distribution, speed, speed, force distribution, force distribution, speed, speed, force distribution, speed, speed, force distribution, force distribution, speed, speed, force distribution, The results show that the rotary flow in the tube is effective in the use of the equipment, the conditions of the device, and the free control of the circumfluence field.