0
TECHNICAL PAPERS: Forced Convection

Fluctuating Temperature Measurements on a Heated Cylinder Placed in a Cylinder Near-Wake

[+] Author and Article Information
Z. J. Wang, Y. Zhou, X. W. Wang, W. Jin

Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong

J. Heat Transfer 126(1), 62-69 (Mar 10, 2004) (8 pages) doi:10.1115/1.1643910 History: Received June 26, 2003; Revised November 19, 2003; Online March 10, 2004
Copyright © 2004 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Fiber-optic Bragg grating sensing system (adapted from Kersey et al. 23; Ho et al. 26). TOF denotes a tunable optical filter, and LP and HP stand for low pass and high pass, respectively.
Grahic Jump Location
Experimental arrangement
Grahic Jump Location
Schematic of test cylinders
Grahic Jump Location
Laser-induced fluorescence flow visualization in the water tunnel behind two inline cylinders: (a) L/d=5.20; (b) 2.50; and (c) 1.18. Re=450. Flow is left to right.
Grahic Jump Location
Time histories of u (the hot wire was placed at x/d=2 and y/d=1.5) and θs at α=85 deg. Time t=0 is arbitrary; (a) L/d=5.20; (b) L/d=2.50; and (c) L/d=1.18. The same scales are used in (a), (b), and (c) for u and θs.
Grahic Jump Location
Power spectral density function Eθs of the fluctuating surface temperature θs at α=85° and Eu of the streamwise fluctuating velocity u: (a) Eθs; and (b) Eu. The hot wire was located at x/d=2 and y/d=1.5. –, L/d=5.20; [[dashed_line]], L/d=2.50; -⋅⋅-⋅⋅-, L/d=1.18.
Grahic Jump Location
Spectral coherences Cohθsu between the fluctuating surface temperature θs at α=85 deg and the streamwise fluctuating velocity u. The hot wire was located at x/d=2 and y/d=1.5. –, L/d=5.20; [[dashed_line]], L/d=2.50; -⋅⋅-⋅⋅-, L/d=1.18.
Grahic Jump Location
Co-spectrum Coθsu between the fluctuating surface temperature θs at α=85 deg and the streamwise fluctuating velocity u. The hot wire was located at x/d=2 and y/d=1.5. —, L/d=5.20; [[dashed_line]], L/d=2.50; -⋅⋅-⋅⋅-, L/d=1.18.
Grahic Jump Location
Circumferential distributions of θs/Θ and Nu (from Adachi et al. 33) on an isolated cylinder. ♦, θs/Θ measured using the FBG sensor; ⋄, θs/Θ measured using a type-K thermocouple; ○, Nu at Re=5000; •, Nu at Re=11000.
Grahic Jump Location
Circumferential distributions of the local time-averaged surface temperature θs/Θ measured using the FBG sensor. ○, L/d=5.20; ▴, L/d=2.50; ▵, L/d=1.18.Re=9080.
Grahic Jump Location
Influence of L/d on the global mean surface temperature Θ of the downstream cylinder
Grahic Jump Location
Circumferential distribution of the rms value θs,rms/Θ of the fluctuating surface temperature θs.Re=9080. ♦, Isolated cylinder; ○, L/d=5.20; ▴, L/d=2.50; ▵, L/d=1.18.

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In