95/06427 A simple model to evaluate direct contact heat transfer and flow characteristics in annular two-phase flow

1995 ◽  
Vol 36 (6) ◽  
pp. 454
Keyword(s):  
Heat Transfer ◽  
Simple Model ◽  
Direct Contact ◽  
Two Phase Flow ◽  
Flow Characteristics ◽  
Phase Flow ◽  
Contact Heat ◽  
Two Phase ◽  
Contact Heat Transfer

Flow and Heat Transfer of Mist/Steam Two-Phase Flow in Two-Pass Rectangular Channels With Paralleled and V-Shaped Rib Turbulators

2018 ◽  
Author(s):  
Guangwen Jiang ◽  
Jianmin Gao ◽  
Xiaojun Shi ◽  
Wang Zhao ◽  
Yunlong Li
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Performance ◽  
Two Phase Flow ◽  
Flow Characteristics ◽  
Internal Cooling ◽  
Phase Flow ◽  
Transfer Performance ◽  
Two Phase ◽  
Flow And Heat Transfer ◽  
Cooling Passage

The heat and flow characteristics of mist/steam two-phase flow in U-shaped internal cooling passage of gas turbine blade are studid numerically in this paper. The standard k-ε model was used as the turbulence model combined with the DPM model to calculate the influence of mist/steam mass ratio and mist diameter on flow and heat transfer of U-passage with different shaped ribs. The result indicates that under the same working condition, the U-shaped channel with 45 deg. V-shaped ribs has better heat transfer performance than other channels and heat transfer non-uniformity of the U-shaped channel with 75 deg. ribs is the worst among all channels studied in this paper. The heat transfer performance of the U-shaped channel with V-shaped ribs is higher than that of the channel with paralleled ribs. As for the mist/steam cooling in U-shaped passage with same ribs structure, heat transfer non-uniformity increases with the increasing of heat transfer performance. When mists diameter increases from 5μm to 15μm, the heat transfer performance of the Second-Flow-Passage increases obviously and the heat transfer non-uniformity increases at the same time. The heat transfer performance has not been further enhanced when the mists diameter continuously increases after mist diameter are larger than 10μm.

Study on Pb-Bi-water direct contact boiling two-phase flow and heat transfer

2005 ◽  
Vol 47 (1-4) ◽  
pp. 569-576 ◽  
Author(s):  
M. Takahashi ◽  
H. Sofue ◽  
T. Iguchi ◽  
Y. Pramono ◽  
F. Huang ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Direct Contact ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Flow And Heat Transfer
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