This paper presents an experimental investigation of roughness effects on aerodynamic performance in a low-speed linear compressor cascade. Equivalent sandgrain roughnesses of , , , , and have been tested. In nondimensional terms, these roughnesses represent compressor blade roughnesses found in actual gas turbines. Downstream pressure, velocity, and angle have been measured with a five-hole probe at 0.3 chord downstream of the blade trailing edge. For the tested roughnesses of , , , and , the axial velocity ratio across the blade row decreases by 0.1%, 2.1%, 2.5%, and 5.4%, respectively. For the same cases, the exit flow angle deviation increases by 24%, 38%, 51%, and 70%, respectively. Finally, the mass-averaged total pressure loss increases by 12%, 44%, 132%, and 217%, respectively. Also, the loss increases more rapidly in the transitionally rough region. Thus, among the three parameters, the loss responds most sensitively to changes in compressor blade roughness.
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June 2010
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Impact of Surface Roughness on Compressor Cascade Performance
Seung Chul Back,
Seung Chul Back
Mechanical and Aerospace Engineering,
Seoul National University
, Seoul 151-744, Korea
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June Hyuk Sohn,
June Hyuk Sohn
Renault Samsung Motors
, Yongin, 446-796 Gyunggi, Korea
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Seung Jin Song
Seung Jin Song
Mechanical and Aerospace Engineering,
Seoul National University
, Seoul 151-744, Korea
Search for other works by this author on:
Seung Chul Back
Mechanical and Aerospace Engineering,
Seoul National University
, Seoul 151-744, Korea
June Hyuk Sohn
Renault Samsung Motors
, Yongin, 446-796 Gyunggi, Korea
Seung Jin Song
Mechanical and Aerospace Engineering,
Seoul National University
, Seoul 151-744, KoreaJ. Fluids Eng. Jun 2010, 132(6): 064502 (6 pages)
Published Online: June 23, 2010
Article history
Received:
October 18, 2009
Revised:
May 11, 2010
Online:
June 23, 2010
Published:
June 23, 2010
Citation
Back, S. C., Sohn, J. H., and Song, S. J. (June 23, 2010). "Impact of Surface Roughness on Compressor Cascade Performance." ASME. J. Fluids Eng. June 2010; 132(6): 064502. https://doi.org/10.1115/1.4001788
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