...Rui Zhu; Guohua Zhang; Shulei Li; Gongnan Xie Film cooling is one of the most efficient and widely used cooling methods for high-temperature components. The interaction between the film cooling jet and main flow creates the counter-rotating vortex pair (CRVP), which enhances the mixing between...

...Jian Liu; Wei Du; Guohua Zhang; Safeer Hussain; Lei Wang; Gongnan Xie; Bengt Sundén Endwall film cooling is a significant cooling method to protect the endwall region and the junction region of endwall and a turbine vane, where usually a relatively high temperature load exists. This work aims...

... controlled by the DBD-VGs is also elucidated in the processes of parametric study with the actuation conditions. The calculation results show that the DBD-VGs provides us an effective approach to further enhance the performance of the film cooling. When it is applied into the flow, symmetrical streamwise...

... to accommodate for small fluctuations in the mainstream flow, a nondimensional approach is used, which also reduces uncertainty, and leads to results which are more repeatable. The film cooling BR is the ratio of local film cooling mass flux to local freestream mass flux, as given by (8) BR = ρ...

... manuscript received September 18, 2014; published online November 5, 2014. Assoc. Editor: Danesh K. Tafti. 03 03 2014 18 09 2014 This paper investigates the flow field and thermal characteristics in the near-field region of film cooling jets through numerical simulations using Reynolds...

...Xueying Li; Yanmin Qin; Jing Ren; Hongde Jiang References [1] Haven , B. A. , Yamagata , D. K. , Kurosaka , M. , Yamawaki , S. , and Maya , T. , 1997 , “ Anti-Kidney Pair of Vortices in Shaped Holes and Their Influence on Film Cooling Effectiveness ,” IGTI Turbo Expo...

.... Ligrani. 27 04 2013 18 08 2013 In this study, the effect of randomness of blowing ratio on film cooling performance is investigated by combining direct numerical simulations with a stochastic collocation approach. The geometry includes a 35-deg inclined jet with a plenum attached...

... / D locations. As such, this latter trend is consistent with the spatially averaged effectiveness data which are presented in Figs. 13–15 . Adiabatic film cooling effectiveness data and iso-energetic heat transfer coefficients are presented for full-coverage film cooling which develops along...

... 14 09 2012 Large eddy simulations of film cooling from a discrete hole inclined 35 deg and fed by a plenum chamber are performed at a density ratio of 2 and blowing ratios from 0.5 to 2.0. Cylindrical holes at a length to diameter ratio of 1.75 and 3.5 are simulated issuing into a crossflow...

...Jin Wang; Bengt Sundén; Min Zeng; Qiu-wang Wang Three-dimensional simulations of the squealer tip on the GE-E 3 blade with eight film cooling holes were carried out. The effect of the rim width and the blowing ratio on the blade tip flow and cooling performance were revealed. Numerical simulations...

... some of the heaviest thermal load over an airfoil [( 7 8 )]. The definition of the leading edge region is open to interpretation, but generally includes the first 20% of the airfoil axial chord length. Film cooling, or often termed “showerhead film cooling”, is most often the technique chosen...

...T. S. Dhanasekaran; Ting Wang Film cooling techniques have been successfully applied to gas turbine blades to protect them from the hot flue gas. However, a continuous demand of increasing the turbine inlet temperature to raise the efficiency of the turbine requires continuous improvement in film...

...Xianchang Li; Ting Wang Air-film cooling has been widely employed to cool gas turbine hot components, such as combustor liners, combustor transition pieces, turbine vanes, and blades. Studies with flat surfaces show that significant enhancement of air-film cooling can be achieved by injecting water...

...Xianchang Li; Ting Wang Effective cooling of gas turbine combustor liners, combustor transition pieces, turbine vanes (nozzles), and blades (buckets) is a critical task to protect these components from the flue gas at extremely high temperature. Air film cooling has been successfully used to cool...

... on the downstream half of the platform for additional cooling. The film cooling effectiveness is measured on the platform using pressure sensitive paint (PSP). Using PSP, it is clear that the film cooling effectiveness on the blade platform is strongly influenced by the platform secondary flow through the passage...

...Xianchang Li; Ting Wang Numerical simulation is performed in this study to explore film-cooling enhancement by injecting mist into the cooling air with a focus on investigating the effect of various modeling schemes on simulation results. The effect of turbulence models, dispersed-phase modeling...

...Sangkwon Na; Tom I-P. Shih A new design concept is presented to increase the adiabatic effectiveness of film cooling from a row of film-cooling holes. Instead of shaping the geometry of each hole; placing tabs, struts, or vortex generators in each hole; or creating a trench about a row of holes...

...Jaeyong Ahn; M. T. Schobeiri; Je-Chin Han; Hee-Koo Moon Detailed film cooling effectiveness distributions are measured on the leading edge of a rotating gas turbine blade with two rows (pressure-side row and suction-side row from the stagnation line) of holes aligned to the radial axis using...

...Xianchang Li; Ting Wang Cooling of gas turbine hot-section components, such as combustor liners, combustor transition pieces, and turbine vanes (nozzles) and blades (buckets), is a critical task for improving the life and reliability of them. Conventional cooling techniques using air-film cooling...

... to this publication during his MPhil program of study. 13 05 2003 24 06 2005 water steel drops sprays two-phase flow cooling mass transfer rotational flow steel industry heat transfer cooling film cooling high temperature droplet sprays and atomization Sprays are used...