Heat Transfer Characteristics in Separated Flows Controlled by Acoustic Excitation

スポンサーリンク

概要

• 論文の詳細を見る

• An experimental study has been conducted to investigate the heat / mass transfer and flow characteristics for flow over a backward-facing step and cavities with various aspect rations. A naphthalene sublimation method is employed to measure the heat / mass transfer coefficients on the bottom wall. Acoustic excitations are forced on the spearated flow using a woofer speaker placed above the step edge for Strouhal numbers between 0.2 and 0.4 In the spectra of streamwise velocity fluctuations for the flow excited at St_H=0.2, a sharp peak appears at the forcing frequency. For the backward-facing step, the reattachment length of about 6.7H is reduced by 0.7〜1.5H when the flow is forced by acoustic excitation. The peak Sh is located about 1.1H upstream from the reattachment point. For the 10H cavity, the reattachment of separated flow, which is unclear for a natural case, is produced clearly by the acoustic excitaition. For the 5H cavity, the turbulence intensity and heat / mass transfer coefficient in the recirculation region are slightly enhanced.

• 一般社団法人日本機械学会の論文
• 2000-11-15

著者

• Kang Seung-Goo

  Department of Orthodontics, Osaka Dental University

• Cho Hyung

  Department Of Mechanical Engineering Yonsei University

• Kang Seung-goo

  Department Of Mechanical Engineering Yonsei University

• Kang Seung-goo

  Department Of Orthodontics Osaka Dental University

• Lee Jinho

  Department Of Mechanical Engineering Yonsei University

• Cho Hyung

  Dept. of Mechanical Eng., Yonsei University

• KANG Seung-Goo

  Dept. of Mechanical Eng., Yonsei University

• JOO Won-Gu

  Dept. of Mechanical Eng., Yonsei University

• LEE Jinho

  Dept. of Mechanical Eng., Yonsei University

• Joo Won-gu

  Department Of Mechanical Engineering Yonsei University

• Cho Hyung

  Dept. Of Mechanical Eng. Yonsei University

• Cho Hyung

  Department of Mechanical Engineering, Yonsei University

関連論文

• Effect of the position of the hyoid bone relative to the oral cavity on occlusion and skeletal patterns
• OSTEOLYSIS OF THE DISTAL CLAVICLE IN THE ELITE ROCK CLIMBER : A CASE REPORT(Proceedings of The 8^ Asian Federation of Sports Medicine Congress 2005 Tokyo)
• C105 HEAT/MASS TRANSFER OF ARRAY IMPINGING JETS WITH PROTRUDING EFFUSION HOLES EJECTING SPENT AIR
• Heat Transfer Characteristics in Separated Flows Controlled by Acoustic Excitation
• F304 HEAT TRASFER CHARACTERISTIC IN SEPARATED FLOWS CONTROLLED BY ACOUSTIC EXCITATION(Control of turbulent mixing process)
• Straightforward Numerical Analysis of Casting Process in a Rectangular Mold: From Filling to Solidification
• C201 HEAT TRANSFER AND FLOW CHARACTERISTICS IN A SINGLE ROTATING DISK AND CO-ROTATING DISKS(Heat transfer in complex system-2)

スポンサーリンク