Surrogate based optimization of a laidback fan-shaped hole for film-cooling

Lee, Ki‐Don; Kim, Kwang‐Yong

doi:10.1016/j.ijheatfluidflow.2010.08.007

Cited by 98 publications

(21 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Bardina et al [27] reported that the SST model more precisely predicted the near wall turbulent flows, including flow separation, than the other eddy viscosity models. Lee and Kim [25] suggested that the numerical results of film-cooling analysis using the SST model also showed very good agreement with the experimental data for the cylindrical and laidback fan-shaped holes. The computational domain consisted of the main channel, supply channel, and two film-cooling holes connecting these two channels, as shown in Fig.…”

Section: Numerical Analysismentioning

confidence: 60%

See 1 more Smart Citation

Analysis and Optimization of Double-Jet Film-Cooling Holes

Choi

Lee

Kim

2013

Journal of Thermophysics and Heat Transfer

Self Cite

View full text Add to dashboard Cite

A parametric analysis and optimization of double-jet film-cooling holes was performed using three-dimensional Reynolds averaged Navier-Stokes equations with the shear stress transport turbulence model. The numerical results for film-cooling effectiveness were validated in comparison with experimental data. The lateral and streamwise distances between the centers of the holes, along with two lateral ejection angles, were chosen as the design variables. The effects of these four variables on the film-cooling effectiveness were evaluated. For optimization of double-jet filmcooling holes, film-cooling effectiveness was considered as the objective function. Latin hypercube sampling was used to determine the design points. A weighted average surrogate model was constructed using the objective function values calculated at the design points. Sequential quadratic programming was used to search for the optimal point from the constructed surrogate. The cooling performance of double-jet film-cooling holes was improved considerably by optimization in comparison with the reference geometry.

show abstract

Section: Numerical Analysismentioning

confidence: 60%

“…They reported that a weighted average surrogate model shows reliable and robust performance in terms of prediction accuracy. Finally, Lee and Kim [22][23][24][25] performed the single-and multi-objective optimizations of fan-shaped film-cooling holes using a surrogate modeling.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Optimization of Double-Jet Film-Cooling Holes

Choi

Lee

Kim

2013

Journal of Thermophysics and Heat Transfer

Self Cite

View full text Add to dashboard Cite

show abstract

“…To our knowledge, two main concerns were emphasized on the fan-shaped hole film cooling more recently. In the view of bringing out the latent potentiality of the existing cooling configuration, multi-parameter optimization of the fan-shaped hole film cooling was an important research concern (Lee and Kim, 2010Kim, , 2011Wang et al, 2016). Another concern was the extensive demonstration of fan-shaped film cooling under more representative application situations.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of internal crossflow effects on film cooling performance at turbine blade suction surface

Zhao

Zhang

Tan

2018

JTST

View full text Add to dashboard Cite

A series of numerical simulations are performed to study the internal crossflow effect on single-row film cooling performances on a turbine blade suction surface, under the representative film-cooled engine-simulated conditions. The cylindrical and fan-shaped holes are considered, both having the same length-to-diameter of 3. In the current simulations, the blowing ratio (Br) is selected as 1, 2 and 3 respectively. The velocity ratio of the internal crossflow to ejection jet (Vr) is selected as 0, 1 and 2, respectively. The results show that the helical flow feature is dominant inside film hole with the presence of internal crossflow and the ejection jet is pushed toward one side in accordance to the internal flow direction. For the fan-shaped hole, the effect of internal crossflow on mutual interaction between ejection jet and primary flow downstream the film cooling hole is relatively weaker in compared to the cylindrical hole. In general, the velocity ratio of Vr=1.0 has a little influence on the film-hole discharge coefficient. However, under a high velocity ratio of Vr=2.0, approximately 15%~20% reduction of discharge coefficient is produced for the cylindrical hole, and 20%~27% reduction for the fan-shaped hole. In the viewing of laterally-averaged adiabatic film cooling effectiveness, the impact of internal crossflow effect is more profound for the cylindrical hole. In general, a moderate velocity ratio (Vr=1.0) plays a positive role on film cooling improvement but a high velocity ratio (Vr=2.0) is confirmed to reduce the film cooling effectiveness.

show abstract

“…Lee and Kim [5] numerically optimized a laidback fan-shaped hole film cooling. Their work has been performed to evaluate the effects of geometric variables of laidback fan-shape hole on film cooling.…”

Section: Introductionmentioning

confidence: 99%