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Keywords: film cooling
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Journal Articles
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. February 2023, 15(2): 021002.
Paper No: TSEA-22-1290
Published Online: October 18, 2022
... row will form combined-hole units. The kidney–vortex pairs in the combined-hole unit will interact with each other and get weakened, finally enhancing film cooling performance. Compared to the original two rows of staggered holes, the coolant mass flowrate will be reduced by 25% for the new hole...
Journal Articles
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. November 2022, 14(11): 111014.
Paper No: TSEA-22-1128
Published Online: July 18, 2022
...Bo Bai; Zhigang Li; Jun Li; Shuo Mao; Wing F. Ng In this paper, the endwall film cooling and vane pressure side surface phantom cooling performances of a first nozzle guide vane (NGV) with endwall contouring, similar to an industry gas turbine, were experimentally and numerically evaluated...
Journal Articles
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. November 2022, 14(11): 111009.
Paper No: TSEA-21-1638
Published Online: June 15, 2022
...Ting Wang; Lei Zhao; Ramy Abdelmaksoud Film cooling is a cooling technique widely used in high-performance gas turbines to protect the turbine airfoils from being damaged by hot flue gases. Motivated by the need to further improve the turbine hot section cooling performance, a mist/air film cooling...
Journal Articles
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. November 2022, 14(11): 111010.
Paper No: TSEA-21-1639
Published Online: June 15, 2022
...Ramy Abdelmaksoud; Ting Wang; Lei Zhao In this Part II of the paper, a numerical study has been performed to validate the multiphase computational fluid dynamics (CFD) model by comparing its results to the experimental data of an air/mist film cooling study presented in Part I . The complete...
Journal Articles
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. September 2022, 14(9): 091006.
Paper No: TSEA-21-1653
Published Online: March 8, 2022
...Rui Zhu; Shulei Li; Gongnan Xie Internal cooling and film cooling, as two main cooling methods in modern gas turbines, work together to protect the high-temperature components of gas turbines. This paper presents the results of a computational study on cooling performance for a flat plate with both...
Journal Articles
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. April 2022, 14(4): 041007.
Paper No: TSEA-20-1715
Published Online: July 30, 2021
...Spencer J. Sperling; Randal M. Mathison Gas turbine film cooling creates complicated and highly unsteady flow structures. This study seeks to examine the unsteady characteristics created by different cooling hole inlet geometries using a fast-response pressure-sensitive paint (PSP) technique able...
Journal Articles
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. March 2022, 14(3): 031006.
Paper No: TSEA-21-1054
Published Online: June 22, 2021
... of the cooling hole to investigate incoming turbulent boundary layer effect on the film cooling flow behavior. Without the trip, horseshoe vortex generated by laminar boundary layer induced laterally discharging cooling flow in the lateral direction. Meanwhile, the induced cooling flow formed high film cooling...
Journal Articles
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. January 2022, 14(1): 011012.
Paper No: TSEA-21-1037
Published Online: June 17, 2021
... was 500,000 with an inlet turbulence intensity of 15%. The film cooling effectiveness and heat transfer coefficient distribution were obtained by the transient liquid crystal (TLC) technology, three mass flow ratios (MFRs = 7.0%, 9.9%, 11%) and two density ratios (DRs = 1.0, 1.5) were tested. The results show...
Journal Articles
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. December 2021, 13(6): 061007.
Paper No: TSEA-20-1644
Published Online: March 31, 2021
.... The present study experimentally investigates the effects of leakage flow through the slot between the gas turbine vane and blade rows on the film cooling effectiveness of the forward region of the shroud ring segment. The experiment is carried out in a linear cascade with five blades. Instead of the vane...
Journal Articles
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. December 2021, 13(6): 061001.
Paper No: TSEA-20-1525
Published Online: March 30, 2021
... of the micro-scale surface structures is demonstrated by using well-validated numerical simulations. Overall film cooling performance and total thermodynamic loss are examined to comprehensively evaluate the feasibility of the micro-scale surface patterns for three cavity air flowrates. Detailed thermal fields...
Journal Articles
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. June 2021, 13(3): 031027.
Paper No: TSEA-20-1180
Published Online: November 11, 2020
...Ashutosh Kumar Singh; Kuldeep Singh; Dushyant Singh; Niranjan Sahoo The large eddy simulations (LES) are performed to access the film cooling performance of cylindrical and reverse shaped hole for forward and reverse injection configurations. In the case of reverse/backward injection, the secondary...
Journal Articles
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. June 2021, 13(3): 031016.
Paper No: TSEA-20-1145
Published Online: October 27, 2020
...Mallikarjuna Rao Pabbisetty; B. V. S. S. S. Prasad A novel mist-assisted air film cooling scheme is proposed by Li and Wang (2006, “Simulation of Film Cooling Enhancement With Mist Injection,” ASME J. Heat Transfer, 128 , pp. 509–519) to increase the film cooling effectiveness of a gas turbine...
Journal Articles
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. April 2021, 13(2): 021004.
Paper No: TSEA-20-1098
Published Online: July 14, 2020
... of the air/mist fluid flow inside and outside the blades as well as the heat conduction through the blade body. The complete 3D blade with internal cooling passages and external film cooling holes on the surface and blade tip is simulated in a rotating, periodic sector of the blade. The discrete phase model...
Journal Articles
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. August 2020, 12(4): 041002.
Paper No: TSEA-19-1176
Published Online: November 25, 2019
...Bo-lun Zhang; Hui-ren Zhu; Cun-liang Liu; Jian-sheng Wei The film cooling characteristics of the transverse trench (TT) and the double-wave trench (DWT) were numerically studied by using Reynolds-averaged Navier–Stokes simulations with realizable k–ɛ turbulence model and enhanced wall treatment...
Journal Articles
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. February 2020, 12(1): 011009.
Paper No: TSEA-18-1497
Published Online: September 7, 2019
...Ting Wang; Reda Ragab This paper presents a numerical study to investigate the feasibility of transporting water mist to the rotating blades of a high-pressure turbine. The idea of using mist film cooling to enhance conventional air cooling has been proven to be a feasible technique under...
Journal Articles
Article Type: Research-Article
J. Thermal Sci. Eng. Appl. June 2019, 11(3): 031002.
Paper No: TSEA-18-1327
Published Online: January 25, 2019
...Xiao-Ming Tan; Jing-Zhou Zhang; Qing-Zhi Cai Experimental and numerical research is performed to illustrate the effects of pin-fin shapes on mesh-fed slot film cooling performance on a flat-plate model. Three types of pin-fin shapes (such as circular, elliptical, and drop-shaped) with the same...
Journal Articles
Article Type: Research-Article
J. Thermal Sci. Eng. Appl. April 2019, 11(2): 021014.
Paper No: TSEA-18-1130
Published Online: December 6, 2018
...E. Kannan; Seralathan Sivamani; D. G. Roychowdhury; T. Micha Premkumar; V. Hariram Three-dimensional Reynolds-averaged Navier–Stokes equations with shear stress transport turbulence model are used to analyze the film cooling effectiveness on a flat plate having single row of film hole involving...
Journal Articles
Article Type: Research-Article
J. Thermal Sci. Eng. Appl. March 2015, 7(1): 011010.
Paper No: TSEA-13-1113
Published Online: March 1, 2015
...Chang Han; Zhongran Chi; Jing Ren; Hongde Jiang The classical kidney vortexes produced in a round-hole film cooling system are the most important factor adversely influencing on the film cooling effectiveness. It is a good way to overcome the kidney vortexes and improve the film cooling effect...
Journal Articles
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. September 2011, 3(3): 031011.
Published Online: September 13, 2011
...Cuong Q. Nguyen; Perry L. Johnson; Bryan C. Bernier; Son H. Ho; Jayanta S. Kapat Data from conical-shaped film cooling holes are extremely sparse in open literature, especially the cooling uniformity characteristic, an important criterion for evaluating any film cooling design. The authors...