TY - JOUR
T1 - Effect of vane/blade relative position on heat transfer characteristics in a stationary turbine blade
T2 - Part 2. Blade surface
AU - Rhee, Dong Ho
AU - Cho, Hyung Hee
PY - 2008/11
Y1 - 2008/11
N2 - This study was carried out to investigate local heat/mass transfer characteristics on the stationary blade near-tip surface for various relative positions of the blade. A low speed wind tunnel with a stationary annular turbine cascade was used. The test section has a single turbine stage composed of sixteen guide plates and sixteen blades. The chord length of the blade is 150 mm and the mean tip clearance of the blade is 2.5% of the blade chord. Detailed mass transfer measurements were conducted for the stationary blade fixed at six different relative blade positions in a single pitch using a naphthalene sublimation method. The Reynolds number based on the blade inlet velocity and the chord length ranges between 1.0 × 105 and 2.3 × 105 and mean turbulence intensity is about 3%. The change in blade position, which causes a different interaction between vane and blade, changes the incoming flow condition. As a result, significantly different patterns are observed on the blade surface, especially near the blade tip due to the variation in tip leakage flow.
AB - This study was carried out to investigate local heat/mass transfer characteristics on the stationary blade near-tip surface for various relative positions of the blade. A low speed wind tunnel with a stationary annular turbine cascade was used. The test section has a single turbine stage composed of sixteen guide plates and sixteen blades. The chord length of the blade is 150 mm and the mean tip clearance of the blade is 2.5% of the blade chord. Detailed mass transfer measurements were conducted for the stationary blade fixed at six different relative blade positions in a single pitch using a naphthalene sublimation method. The Reynolds number based on the blade inlet velocity and the chord length ranges between 1.0 × 105 and 2.3 × 105 and mean turbulence intensity is about 3%. The change in blade position, which causes a different interaction between vane and blade, changes the incoming flow condition. As a result, significantly different patterns are observed on the blade surface, especially near the blade tip due to the variation in tip leakage flow.
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U2 - 10.1016/j.ijthermalsci.2007.12.007
DO - 10.1016/j.ijthermalsci.2007.12.007
M3 - Article
AN - SCOPUS:50949088515
SN - 1290-0729
VL - 47
SP - 1544
EP - 1554
JO - Revue Generale de Thermique
JF - Revue Generale de Thermique
IS - 11
ER -