Thermal hydraulic performance augmentation by petal-shaped ribs in a two-pass cooling channel

被引：15

作者：

Zhang, Qiang ^{[1
]}

Wang, Tao ^{[1
]}

Hou, QingZhi ^{[2
,3
]}

Song, KeWei ^{[1
]}

Hu, WanLing ^{[1
]}

Wu, Xiang ^{[1
]}

机构：

[1] Lanzhou Jiaotong Univ, Sch Mech Engn, Key Lab Railway Vehicle Thermal Engn MOE, Lanzhou 730070, Gansu, Peoples R China

[2] Qinghai Minzu Univ, Sch Civil & Transportat Engn, Xining 810007, Qinghai, Peoples R China

[3] Tianjin Univ, Sch Civil Engn, Tianjin 300350, Peoples R China

来源：

CASE STUDIES IN THERMAL ENGINEERING | 2022年 / 40卷

基金：

中国国家自然科学基金;

关键词：

Novel rib shape; Petal -shaped rib; A -quarter -cylinder rib; Numerical simulation; HEAT-TRANSFER; RECTANGULAR CHANNELS; FLOW CHARACTERISTICS; FORCED-CONVECTION; SQUARE CHANNELS; PARALLEL; FRICTION; RATIO;

D O I：

10.1016/j.csite.2022.102542

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The increase of inlet gas temperature will lead to security problem of turbine blades. Internal cooling channels are usually used to ensure the safe operation temperature of the turbine blades. Rib-roughness can effectively enhance the cooling performance of the internal channels. To further promote the channel performance, a novel petal-shaped rib is proposed and numerically simulated with SST k-omega model in this paper. Three different rib types, including square rib, aquarter-cylinder rib and petal-shaped rib, are compared under the identical rib height and rib cross-section area. The results showed that the petal-shaped and a-quarter-cylinder ribs have larger heat transfer performance than the normal square rib. The heat transfer of the petal-shaped rib is the largest and increases by up to 21.14% compared with square rib. While the friction factor of the channel with the petal-shaped rib is 10.04% smaller than the square rib. The thermal performance factor of the petal-shaped rib reaches up to 2.02, which concludes a significant

引用

页数：11

共 31 条

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