Effect of partial blockage on flow and heat transfer of film cooling with cylindrical and fan-shaped holes

被引：15

作者：

Chen, Xiaohu ^{[1
]}

Wang, Yuzhang ^{[1
,2
]}

Long, Yun ^{[1
]}

Weng, Shilie ^{[1
,2
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Mech Engn, Minist Educ, Key Lab Power Machinery & Engn, 800 Dong Chuan Rd, Shanghai 200240, Peoples R China

[2] Shanghai Jiao Tong Univ, Gas Turbine Res Inst, 800 Dong Chuan Rd, Shanghai 200240, Peoples R China

来源：

INTERNATIONAL JOURNAL OF THERMAL SCIENCES | 2021年 / 164卷

关键词：

Partial blockage; Film cooling; Flow; Heat transfer; Large eddy simulation;

D O I：

10.1016/j.ijthermalsci.2021.106866

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Large eddy simulation is used to study the effect of partial blockage on the film cooling characteristics of cylindrical and fan-shaped holes at the blowing ratio of M = 0.5. The results show that severe blockage (H/D = 0.75) resulted in a decrease of about 97% and 27% in the laterally-averaged film cooling effectiveness of cylindrical and fan-shaped holes. Slight blockage (H/D < 0.5) improved the cooling performance of the fan-shaped hole by about 13%. The blockage tolerance of the fan-shaped hole is stronger than that of the cylindrical hole. The blockage alters the flow characteristics in the tube and downstream. A "hairpin vortex forest" is formed downstream of the blocked fan-shaped hole with more hairpin vortexes than the unblocked one. These largescale coherent structures dominate the mixing and dispersion. The deterioration of the cooling performance of the blocked cylindrical hole is mainly caused by the strengthening of the head and horizontal legs of the hairpin vortex. Several rows of smaller scale hairpin vortexes downstream of the blocked fan-shaped hole and the streak structure near the wall improved the film cooling effectiveness.

引用

页数：20

共 50 条

[1] Reynolds stresses and turbulent heat fluxes in fan-shaped and cylindrical film cooling holes
Hao, Muting
di Mare, Luca
[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2023, 214
[2] Budgets of Reynolds stresses in film cooling with fan-shaped and cylindrical holes
Hao, Muting
di Mare, Luca
[J]. PHYSICS OF FLUIDS, 2023, 35 (08)
[3] Heat transfer and film-cooling measurements on a stator vane with fan-shaped cooling holes
Colban, W.
Grafton, A.
Thole, K. A.
Haendler, M.
[J]. PROCEEDINGS OF THE ASME TURBO EXPO 2005, VOL 3 PTS A AND B, 2005, : 299 - 309
[4] Heat transfer and film-cooling measurements on a stator vane with fan-shaped cooling holes
Colban, W
Gratton, A
Thole, KA
Haendler, M
[J]. JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME, 2006, 128 (01): : 53 - 61
[5] Film-Cooling Performance of Multiple Arrays of Cylindrical and Fan-Shaped Holes
Najafabadi, Hossein Nadali
Karlsson, Matts
Utriainen, Esa
Kinell, Mats
Wang, Lieke
[J]. JOURNAL OF PROPULSION AND POWER, 2015, 31 (06) : 1621 - 1630
[6] Effect of particle deposition on film cooling from fan-shaped holes
Chen, Xiaohu
Wang, Yuzhang
Long, Yun
Weng, Shilie
[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2021, 181
[7] HEAT TRANSFER PERFORMANCES OF FAN-SHAPED FILM COOLING HOLES. PART II - NUMERICAL ANALYSIS
Bianchini, C.
Facchini, B.
Mangani, L.
Maritano, M.
[J]. PROCEEDINGS OF THE ASME TURBO EXPO 2010, VOL 4, PTS A AND B, 2010, : 1573 - 1583
[8] HEAT TRANSFER PERFORMANCE OF FAN-SHAPED FILM COOLING HOLES. PART I: EXPERIMENTAL ANALYSIS
Bonanni, L.
Facchini, B.
Tarchi, L.
Maritano, M.
Traverso, S.
[J]. PROCEEDINGS OF THE ASME TURBO EXPO 2010, VOL 4, PTS A AND B, 2010, : 1561 - 1571
[9] Effect of hole geometry on the thermal performance of fan-shaped film cooling holes
Gritsch, M
Colban, W
Schär, H
Döbbeling, K
[J]. JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME, 2005, 127 (04): : 718 - 725
[10] Numerical Simulation of Backward Film Cooling with Fan-Shaped Holes
Subbuswanny, Ganesh
Li, Xianchang
Gharat, Kunal
[J]. PROCEEDINGS OF THE ASME SUMMER HEAT TRANSFER CONFERENCE - 2013, VOL 4, 2014,

← 1 2 3 4 5 →