Influence of hole imperfection on jet cross flow interaction

Jovanovic, MB Milenko; Lange, de Hc Rick; Steenhoven, van Aa Anton

doi:10.1016/j.ijheatfluidflow.2005.06.003

Cited by 33 publications

(17 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Test case description Two geometrical configurations which have been studied experimentally by Jovanović et al (2006) are reproduced here. In the first configuration, the jet was injected perpendicularly into the cross-flow through the cylindrical hole with a diameter D ¼ 64 mm (Figure 1(a)).…”

Section: Turbulence and Mathematical Modelsmentioning

confidence: 99%

See 1 more Smart Citation

Numerical investigation of the influence of a hole imperfection on film cooling effectiveness

Nemdili

Azzi

Jubran

2011

International Journal of Numerical Methods for Heat &Amp; Fluid Flow

View full text Add to dashboard Cite

Purpose -The purpose of this paper is to report a numerical investigation of jet-cross-flow interaction in the presence of imperfection inside the injection hole with application to film cooling of turbine blades. Design/methodology/approach -The work includes the prediction of the thermal and hydrodynamic fields by solving the Reynolds Averaged Navier Stokes and energy equations using the finite volume method with a body-fitted hexahedral unstructured grid. The turbulence field is resolved by use of the k-epsilon turbulence model. Findings -The computational results show a dramatic and rapid decrease of the film cooling effectiveness when the obstruction is superior to 50 per cent. It is found that when the obstruction is close to the exit hole, the thermal protection is significantly reduced.Research limitations/implications -The present numerical investigation is simply directed towards a qualitative investigation of hole imperfection effects on film cooling. Practical implications -The motivation comes from several industrial applications such as film cooling of gas turbine components and fuel injection. One of the main challenges of using film cooling is the blockage of holes by particles ingested by the engine during landing/take off or due to application of thermal barrier coating or due to combustion particles as well as inaccuracies that result from drilling of holes. Originality/value -The main goal of the present study is to conduct a numerical parametric investigation rather than reproducing the exact Jovanović's experimentation.

show abstract

Section: Turbulence and Mathematical Modelsmentioning

confidence: 99%

“…Inaccuracies can results from applying TBC to the film-cooled blades (Sundaram and Thole, 2007). Jovanović et al (2006) reported the effect of discrete imperfection inside a short perpendicular hole and found that an additional vortex is generated due to imperfection which in turn changes the film cooling effectiveness.…”

mentioning

confidence: 99%

Numerical investigation of the influence of a hole imperfection on film cooling effectiveness

Nemdili

Azzi

Jubran

2011

International Journal of Numerical Methods for Heat &Amp; Fluid Flow

View full text Add to dashboard Cite

show abstract

“…Recently, many researchers [3][4][5][6][7][8] employed PIV techniques to further investigate the influences of the previously mentioned parameters on film cooling flow structure.…”

Section: Introductionmentioning

confidence: 99%

Application of algebraic anisotropic turbulence models to film cooling flows

Ren

Jiang

2015

International Journal of Heat and Mass Transfer

View full text Add to dashboard Cite

“…They classified the vortical structures into a shear layer, horseshoe and wake vortices and a counter rotating vortex pair. Jovanovic et al [2] illustrated Figure 1 which shows vortical structures generated by means of jet cross-flow interaction with film cooling characteristics. Morton and Ibbetson [3] analyzed the warp mechanism of the vortical structures.…”

Section: Introductionmentioning

confidence: 99%

Quantitative measuring methods applied for the mixing phenomena of film cooling

Takeishi¹,

Komiyama²,

Oda³

2014

WIT Transactions on Engineering Sciences

View full text Add to dashboard Cite

In this paper, the quantitative measuring methods of Pressure Sensitive Paint (PSP), acetone Laser Induced Fluorescence (LIF) and Particle Image Velocimetry (PIV) are presented for the measuring of a complicated mixing flow field of film coolant and a mainstream. The time-averaged film cooling effectiveness was accurately measured with the PSP method, when precise calibration has been conducted. Instantaneous distributions of velocity vectors and film cooling effectiveness were measured simultaneously near the exit of circular hole by acetone LIF and PIV. The simultaneous measurement is very useful not only to clear the spatial flow field of film cooling but also to confirm the accuracy of numerical simulations of film cooling.

show abstract

Influence of hole imperfection on jet cross flow interaction

Cited by 33 publications

References 19 publications

Numerical investigation of the influence of a hole imperfection on film cooling effectiveness

Numerical investigation of the influence of a hole imperfection on film cooling effectiveness

Application of algebraic anisotropic turbulence models to film cooling flows

Quantitative measuring methods applied for the mixing phenomena of film cooling

Contact Info

Product

Resources

About