每年出版 8 期
ISSN 打印: 1065-5131
ISSN 在线: 1563-5074
IF:
2.3
5-Year IF:
1.8
Immediacy Index:
0.2
Eigenfactor:
0.00037
JCI:
0.6
SJR:
0.433
SNIP:
0.593
CiteScore™::
4.3
H-Index:
35
Indexed in
COMPUTATIONAL INVESTIGATION OF DIMPLE EFFECTS ON HEAT TRANSFER AND FRICTION FACTOR IN A LAMILLOY COOLING STRUCTURE
Get access
摘要
Good heat transfer performance with a moderate pressure drop penalty contributes to the gas turbine engine lifetime and guaranteeing engine efficiency. In this study, the dimple effects for a Lamilloy® (Allison Advanced Development Corporation, Indiana, IN, USA) cooling structure on the heat transfer and friction factor are numerically investigated. The dimple is positioned directly under the jet impingement nozzle. The Reynolds number ranges from 10,000 to 70,000, the dimple normalized depth is between 0 and 0.3, and the dimple normalized diameter varies from 1 to 2.5. The results for the flow field, target surface heat transfer, pin fin surface heat transfer, friction factor, and solid domain outer-wall temperature are included. For comparison, a Lamilloy cooling structure without the dimple is considered as the baseline. The results show that the dimple significantly increases the local heat transfer due to flow reattachment and recirculation. With an increase in the normalized dimple depth, the heat transfer on the target surface is first augmented due to the increase of flow reattachment and recirculation, and then it is decreased due to the large toroidal vortex. However, an increase in the dimple depth results in reduction of the pin fin surface heat transfer. As the dimple diameter increases, the target surface heat transfer is also first augmented due to the increase in the flow reattachment and recirculation, and then it is decreased as the flow separation increases. The thermal performance indicates that the intensity of the heat transfer enhancement depends on the depth and diameter of the dimple.
-
Luo Lei, Wen Fengbo, Wang Lei, Sundén Bengt, Wang Songtao, Thermal enhancement by using grooves and ribs combined with delta-winglet vortex generator in a solar receiver heat exchanger, Applied Energy, 183, 2016. Crossref
-
Luo Lei, Wen Fengbo, Wang Lei, Sundén Bengt, Wang Songtao, On the solar receiver thermal enhancement by using the dimple combined with delta winglet vortex generator, Applied Thermal Engineering, 111, 2017. Crossref
-
Manglik Raj M., Enhancement of Convective Heat Transfer, in Handbook of Thermal Science and Engineering, 2017. Crossref
-
Luo Lei, Du Wei, Wang Songtao, Wang Lei, Sundén Bengt, Zhang Xinhong, Multi-objective optimization of a solar receiver considering both the dimple/protrusion depth and delta-winglet vortex generators, Energy, 137, 2017. Crossref
-
Jing Qi, Zhang Di, Xie Yonghui, Numerical investigations of impingement cooling performance on flat and non-flat targets with dimple/protrusion and triangular rib, International Journal of Heat and Mass Transfer, 126, 2018. Crossref
-
Manglik Raj M., Enhancement of Convective Heat Transfer, in Handbook of Thermal Science and Engineering, 2018. Crossref
-
Saha Sujoy Kumar, Ranjan Hrishiraj, Emani Madhu Sruthi, Bharti Anand Kumar, Active and Passive Techniques: Their Applications, in Introduction to Enhanced Heat Transfer, 2020. Crossref
-
Luo Lei, Yan Han, Yang Shaoyun, Du Wei, Wang Songtao, Sunden Bengt, Zhang Xinghong, Convergence angle and dimple shape effects on the heat transfer characteristics in a rotating dimple-pin fin wedge duct, Numerical Heat Transfer, Part A: Applications, 74, 10, 2018. Crossref
-
Wang Chen, Zhang Jingzhou, Wang Chunhua, Tan Xiaoming, Multi-optimization of a specific laminated cooling structure for overall cooling effectiveness and pressure drop, Numerical Heat Transfer, Part A: Applications, 79, 3, 2021. Crossref
-
Wang Songtao, Li Shouzuo, Luo Lei, Zhao Zhiqi, Du Wei, Sundén Bengt, A high temperature turbine blade heat transfer multilevel design platform, Numerical Heat Transfer, Part A: Applications, 79, 2, 2021. Crossref
-
Zhao Zhiqi, Luo Lei, Li Shouzuo, Qiu Dandan, Wang Songtao, Wang Zhongqi, Cooling structure design of gas turbine blade by using multi-level highly efficient design platform, Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, 235, 5, 2021. Crossref
-
GAO Wenjing, LI Honglin, LI Lei, ZHAO Zhe'nan, YUE Zhufeng, Numerical simulation of broken pin effects on the flow field and cooling performance of a double-wall cooling configuration, Chinese Journal of Aeronautics, 34, 2, 2021. Crossref
-
Wang Chen, Wang Chunhua, Zhang Jingzhou, Cervone Angelo, Parametric Studies of Laminated Cooling Configurations: Overall Cooling Effectiveness, International Journal of Aerospace Engineering, 2021, 2021. Crossref
-
Nourin Farah Nazifa, Amano Ryoichi S., Heat Transfer Augmentation With Multiple Jet Impingement Cooling on Dimpled Surface for Gas Turbine Blades, Journal of Energy Resources Technology, 145, 2, 2023. Crossref
-
Jia Haonan , Zhu Feng , Tian Xing, Guo Zhigang, Yang Jian, Wang Qiuwang, NUMERICAL INVESTIGATION OF HEAT TRANSFER ENHANCEMENT WITH DIMPLED PARTICLES IN STRUCTURED PACKED BEDS , Heat Transfer Research, 53, 17, 2022. Crossref