... of internal enhanced cooling at the endwall backside could be an option, but it increases manufacturing cost, adds weight to the component, causing excessive pressure losses in the secondary air system. Novel film cooling concepts are, therefore, required to provide effective cooling for these difficult...

...Guoqing Li; Ang Li; Shen Zhang; Chenfeng Wang; Xingen Lu Under the influence of secondary flow, the film cooling deviates from the flow direction on the turbine blade, which directly results in undesirable uneven film coverage. On the pressure side, the film appears divergent, while on the suction...

...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...

... Simon. 09 04 2013 14 11 2014 17 12 2014 The present experimental investigation considers a full coverage film cooling arrangement with different streamwise static pressure gradients. The film cooling holes in adjacent streamwise rows are staggered with respect to each other...

.... 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-averaged Navier–Stokes (RANS) and hybrid unsteady RANS (URANS)/large eddy...

..., 2013. Assoc. Editor: Phillip M. Ligrani. 31 03 2013 09 09 2013 The complex structures in the film cooling flow field of gas turbines lead to the anisotropic property of the turbulent eddy viscosity and scalar diffusivity. An algebraic anisotropic turbulence model is developed...

... deviation of the local film cooling effectiveness, since θ ¯ ( x 1 , 0 , x 3 ; ξ ) = 1 - η ( x 1 , x 3 ; ξ ) . The region immediately downstream of the jet hole has the largest amount of variability in film cooling effectiveness of σ η...

... and no further improvement in cooling protection is possible by increasing the coolant mass flow rate. This negligible dependence on the blowing ratio for dense film cooling arrays agrees with the findings of Lin et al. [ 16 ] and Scrittore et al. [ 2 ], who also conclude that blowing ratio has a negligible...

... at two locations. In the near field ( x/D  = 1), the cooling effectiveness distribution agrees very well with the measurements. This is in contrast with the RANS predictions reported that typically do not correctly predict the lateral distributions of the near-field film cooling effectiveness. Further...

...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...

... fuels gas turbines syngas film cooling leading edge main body trailing edge endwall tip turn heat transfer coefficient Gas turbines are the workhorse for propulsion and power generation systems. For those well-developed countries, technical advances in gas turbines link directly...

...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...