TY - GEN
T1 - Experimental study of rotation effects on heat/mass transfer in a smooth channel with bleed holes
AU - Kim, Kyung Min
AU - Kim, Sang In
AU - Jeon, Yun Heung
AU - Lee, Dong Hyun
AU - Cho, Hyung Hee
PY - 2006
Y1 - 2006
N2 - The present study investigates the effects of bleed flow on heat/mass transfer in a rotating smooth channel. The hydraulic diameter (D h) of the channel is 40.0 mm and the diameter of the bleed holes (d) on leading surface is 4.5 mm. The tests were conducted under conditions of various bleed flow rates (0%, 10%, 20%) and rotation numbers (0, 0.2, 0.4), while Reynolds number was fixed at 10,000. A naphthalene sublimation method was employed to determine detailed local heat transfer coefficients using heat and mass transfer analogy. The results suggest that heat/mass transfer characteristics in internal cooling passages are influenced by bleed flow and Coriolis force induced by rotation. For cases with the bleed flow, the heat/mass transfer on the leading surface is higher than that without the bleed flow due to tripping flow by suction. With increment of rotation numbers, the heat/mass transfer on the leading surface is increased before Ro=0.2, but is decreased after Ro=0.2 by rotation effects.
AB - The present study investigates the effects of bleed flow on heat/mass transfer in a rotating smooth channel. The hydraulic diameter (D h) of the channel is 40.0 mm and the diameter of the bleed holes (d) on leading surface is 4.5 mm. The tests were conducted under conditions of various bleed flow rates (0%, 10%, 20%) and rotation numbers (0, 0.2, 0.4), while Reynolds number was fixed at 10,000. A naphthalene sublimation method was employed to determine detailed local heat transfer coefficients using heat and mass transfer analogy. The results suggest that heat/mass transfer characteristics in internal cooling passages are influenced by bleed flow and Coriolis force induced by rotation. For cases with the bleed flow, the heat/mass transfer on the leading surface is higher than that without the bleed flow due to tripping flow by suction. With increment of rotation numbers, the heat/mass transfer on the leading surface is increased before Ro=0.2, but is decreased after Ro=0.2 by rotation effects.
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M3 - Conference contribution
AN - SCOPUS:84866954233
SN - 9781604236774
T3 - Proceedings of the 11th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC-11
SP - 132
EP - 141
BT - Proceedings of the 11th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC-11
T2 - 11th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC-11
Y2 - 26 February 2006 through 2 March 2006
ER -