Experimental investigation on rotation and turning vane effects on heat transfer was performed in a two-pass rectangular internal cooling channel. The channel has an aspect ratio of AR = 2:1 and a 180 deg tip-turn, which is a scaled up model of a typical internal cooling passage of gas turbine airfoils. The leading surface (LS) and trailing surface (TS) are roughened with 45 deg angled parallel ribs (staggered P/e = 8, e/Dh = 0.1). Tests were performed in a pressurized vessel (570 kPa) where higher rotation numbers (Ro) can be achieved with a maximum Ro = 0.42. Five Reynolds numbers (Re) were examined (Re = 10,000–40,000). At each Reynolds number, five rotational speeds (Ω = 0–400 rpm) were considered. Results showed that rotation effects are stronger in the tip regions as compared to other surfaces. Heat transfer enhancement up to four times was observed on the tip wall at the highest rotation number. However, heat transfer enhancement is reduced to about 1.5 times with the presence of a tip turning vane at the highest rotation number. Generally, the tip turning vane reduces the effects of rotation, especially in the turn portion.
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Heat Transfer in a Rotating Cooling Channel (AR = 2:1) With Rib Turbulators and a Tip Turning Vane
Andrew F. Chen,
Andrew F. Chen
Turbine Heat Transfer Laboratory,
Department of Mechanical Engineering,
Texas A&M University,
College Station, TX 77843-3123
e-mail: mrandrewchen@outlook.com
Department of Mechanical Engineering,
Texas A&M University,
College Station, TX 77843-3123
e-mail: mrandrewchen@outlook.com
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Hao-Wei Wu,
Hao-Wei Wu
Turbine Heat Transfer Laboratory,
Department of Mechanical Engineering,
Texas A&M University,
College Station, TX 77843-3123
e-mail: zwoodwu@gmail.com
Department of Mechanical Engineering,
Texas A&M University,
College Station, TX 77843-3123
e-mail: zwoodwu@gmail.com
Search for other works by this author on:
Nian Wang,
Nian Wang
Turbine Heat Transfer Laboratory,
Department of Mechanical Engineering,
Texas A&M University,
College Station, TX 77843-3123
e-mail: wangnian@gmail.com
Department of Mechanical Engineering,
Texas A&M University,
College Station, TX 77843-3123
e-mail: wangnian@gmail.com
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Je-Chin Han
Je-Chin Han
Fellow ASME
Turbine Heat Transfer Laboratory,
Department of Mechanical Engineering,
Texas A&M University,
College Station, TX 77843-3123
e-mail: jc-han@tamu.edu
Turbine Heat Transfer Laboratory,
Department of Mechanical Engineering,
Texas A&M University,
College Station, TX 77843-3123
e-mail: jc-han@tamu.edu
Search for other works by this author on:
Andrew F. Chen
Turbine Heat Transfer Laboratory,
Department of Mechanical Engineering,
Texas A&M University,
College Station, TX 77843-3123
e-mail: mrandrewchen@outlook.com
Department of Mechanical Engineering,
Texas A&M University,
College Station, TX 77843-3123
e-mail: mrandrewchen@outlook.com
Hao-Wei Wu
Turbine Heat Transfer Laboratory,
Department of Mechanical Engineering,
Texas A&M University,
College Station, TX 77843-3123
e-mail: zwoodwu@gmail.com
Department of Mechanical Engineering,
Texas A&M University,
College Station, TX 77843-3123
e-mail: zwoodwu@gmail.com
Nian Wang
Turbine Heat Transfer Laboratory,
Department of Mechanical Engineering,
Texas A&M University,
College Station, TX 77843-3123
e-mail: wangnian@gmail.com
Department of Mechanical Engineering,
Texas A&M University,
College Station, TX 77843-3123
e-mail: wangnian@gmail.com
Je-Chin Han
Fellow ASME
Turbine Heat Transfer Laboratory,
Department of Mechanical Engineering,
Texas A&M University,
College Station, TX 77843-3123
e-mail: jc-han@tamu.edu
Turbine Heat Transfer Laboratory,
Department of Mechanical Engineering,
Texas A&M University,
College Station, TX 77843-3123
e-mail: jc-han@tamu.edu
1Corresponding author.
Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received January 31, 2018; final manuscript received April 30, 2018; published online June 8, 2018. Assoc. Editor: Danesh K. Tafti.
J. Heat Transfer. Oct 2018, 140(10): 102007 (10 pages)
Published Online: June 8, 2018
Article history
Received:
January 31, 2018
Revised:
April 30, 2018
Citation
Chen, A. F., Wu, H., Wang, N., and Han, J. (June 8, 2018). "Heat Transfer in a Rotating Cooling Channel (AR = 2:1) With Rib Turbulators and a Tip Turning Vane." ASME. J. Heat Transfer. October 2018; 140(10): 102007. https://doi.org/10.1115/1.4040260
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