Analysis of drag reduction and heat transfer under a non-similar condition between turbulent flow and temperature fields

湍流与温度场非相似条件下减阻传热分析

• 批准号: 13650205
• 负责人: KURODA Akiyoshi
• 金额: $ 1.66万
• 依托单位: HOKKAIDO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650205/
• 关键词: Turbulence Control; Numerical Simulation; Turbulent Heat Transfer; Similarity; Channel Flow; DNS

Numerical simulations of the velocity and temperature fields in a fully developed turbulent channel flow were carried out. It is well known that the similarity between the heat transfer and the friction exists in such a turbulent wall bounded flow as the Reynolds analogy. We applied a turbulence control to reduce the drag by blowing and suction on the channel walls. And it is found that the heat transfer rate reduces as well as the skin friction does. But the rate of the heat transfer to the momentum transfer is a littie larger than that of the natural (no-control) flow. The correlation between velocity and temperature fluctuations weakens owing to the local pressure gradient when the blowing velocity is imposed on the wall against the fluid moving towards the wall.

对充分发展的槽道湍流流场进行了数值模拟。众所周知，在雷诺类比的湍流壁面边界流动中，存在着传热与摩擦的相似性。我们应用了湍流控制，通过在通道壁上吹气和吸气来减少阻力。研究发现，表面摩擦力的增加会使表面换热速率降低。但热传递转化为动量传递的速率比自然（无控制）流动的速率稍大。当吹气速度作用在壁面上时，由于局部压力梯度的存在，速度和温度波动之间的相关性减弱。

项目成果

坂斉秀和, 工藤一彦, 黒田明慈: "吹き出し・吸い込み制御による壁面摩擦低減とその温度場のDNS"第40回日本伝熱シンポジウム講演論文集. (発表予定). (2003)

Hidekazu Saka、Kazuhiko Kudo、Akiji Kuroda：“通过吹/吸控制和温度场 DNS 减少壁面摩擦”第 40 届日本传热研讨会论文集（2003 年）。

Sakasai,H., Kudo,K., Kuroda,A.: "Direct Numerical Simulation of Temperature Field in Wall-Bounded Flow with Injection and Suction Aimed for Drag Reduction"Proc. 40^<th> National Heat Transfer Symposium of Japan. (to be published). (2003)

Sakasai,H.、Kudo,K.、Kuroda,A.：“以减阻为目的的注入和抽吸壁面流动温度场的直接数值模拟”Proc。

黒田明慈, 坂斉秀和, 工藤一彦: "吹き出し・吸い込み制御による壁面摩擦低減とその温度場のDNS"第40回日本伝熱シンポジウム講演論文集. (発表予定). (2003)

Akiji Kuroda、Hidekazu Sakasari、Kazuhiko Kudo：“通过吹吸控制及其温度场 DNS 减少壁面摩擦”第 40 届日本传热研讨会论文集（2003 年）。