Film cooling simulation on an entire gas turbine blade with square pulsed coolant injection


Faculty of Mechanical Engineering, Semnan University, Semnan, Iran



Film cooling is an effective method to keep the gas turbine blades from high temperature gases and thermal stresses. Square pulsating film cooling on different sections of a modified NASA C3X blade is numerically investigated. Temperature distribution and film cooling performance are investigated for various blowing ratios of 0.5, 0.75, 1.0, 1.5, 2 and 2.5 in pulse frequency of 50Hz. Reynolds-Averaged Navier-Stokes equations for steady and pulsating injection considered. The shear stress transport ( ) model applied for turbulence effects. Simulations are performed using finite volume method. Obtained results show different findings of pulsating film cooling on the various blade surfaces. For large blowing ratios, averaged pulsed film covering effectiveness at leading edge and pressure side of blade is reduced compared to small and middle values of blowing ratios. This trend is reversed in the suction side. Reynolds number of mainstream has the maximum effect on film effectiveness distribution on pressure section. The averaged centerline pulsed film coolant performance on the pressure surface and leading edge at blowing ratio of 0.5 and for suction side at blowing ratio 2.5 was maximum.


[1] Zirak S., Ebrahimi H., Maissamy A.R., The Required Power of the MGT-40 Gas Turbine,Starter, Energy Equipment and Systems (2015) 3: 137-142.
[2] Foroutan H., M Rajabi-Zargarabadi F., Film Cooling Effectiveness in Single Row of Holes: First Moment Closure Modeling, Energy Equipment and Systems, (2013) 1: 5-18.
[3] Mousavi S.M., Nejat A., Kowsary F., Optimization of Turbine Blade Cooling with the Aim of Overall Turbine Performance Enhancement, Energy Equipment and Systems, (2017) 5: 71-83.
[4] Park S.H., Kang Y.J., Seo H.J., Kwak J.S., Kang Y.S., Experimental Optimization of a Fan-Shaped Film Cooling Hole with 30 Degrees-Injection Angle and 6-Hole Length-to-Diameter Ratio, International Journal of Heat and Mass Transfer (2019) 144: 118652.
[5] Abdelmohimen M.A., Mohiuddin A., Experimental Investigation of Film Cooling from Compound Angle Holes Supplemented by Secondary Holes, International Journal of Heat and Mass Transfer (2019) 144: 118678.
[6] Chen Z., Zhang  Z., Li Y., Su X., Yuan X., Vortex Dynamics Based Analysis of Internal Crossflow Effect on Film Cooling Performance, International Journal of Heat and Mass Transfer (2019)145: 118757.
[7] Qingzong X., Qiang D., Pei W., Junqiang Z., Computational Study of Film Cooling and Flowfields on a Stepped Vane Endwall with a Row of Cylindrical Hole and Interrupted Slot Injections, International Journal of Heat and Mass Transfer (2019) 134: 796-806.
[8] Mousavi S.M., Rahnama S.M., Shape Optimization of Impingement and Film Cooling Holes on a Flat Plate Using a Feed Forward ANN and GA, Energy Equipment and Systems (2018) 6: 247-259.
[9] Zhang C., Wang J., Luo X., Song L., Li J., Feng Z., Experimentally Measured Effects of Height and Location of the Vortex Generator on Flow and Heat Transfer Characteristics of theFlat-Plate Film Cooling, International Journal of Heat and Mass Transfer (2019) 141: 995-  1008.
[10] Liu Y., Luo Y., Transient Simulation of Pulsed Purge Film Cooling on Flow and Thermal Characteristics of a Turbine Endwall, Applied Thermal Engineering (2019) 161: 114208.
[11] Hosseini Baghdad Abadi S.M., Zirak S., Rajabi Zargar Abadi M., Numerical Simulation of the Sinusoidal Wave Pulsed Film Cooling Effectiveness Due to the Changing Cooling Injection Parameters, Journal of Modares Mechanical Engineering  (2019) 19: 191-200.
[12] Womack K.M., Volino R.J., Schultz M.P., Combined Effects of Wakes and Jet Pulsing on Film Cooling, Journal of Turbomachinery, (2008) 130: 041010.
[13] Borup D.D., Fan D., Elkins C.J., Eaton J.K., Experimental Study of Periodic Free Stream Unsteadiness Effects on Discrete Hole Film Cooling in Two Geometries, Journal of Turbomachinery (2019) 141: 061006.
[14] Abdous R., Zirak S., Performance Evaluation of Trapezoidal Teeth Labyrinth Seal, Energy Equipment and Systems (2017) 5: 265-273.
[15] Hosseini Baghdad Abadi S.M., Zirak S., Rajabi Zargarabadi M., Numerical Investigation of the Effect of Sinusoidal Pulsating Cooling Air on Film Cooling Effectiveness of Leading Edge, Pressure and Suction Side of a Turbine Blade, Journal of Solid and Fluid Mechanics (2019) 9: 227-247.
[16] Montomoli F., D’Ammaro A., Uchida S., Numerical and Experimental Investigation of a New Film Cooling Geometry with High P/D Ratio, International Journal of Heat Mass Transfer (2013) 66: 366-375.
[17] Lin Y.L., Shih T.P., Film Cooling of a Cylindrical Leading Edge with Injection Through Rows of Compound-Angle Holes, Journal of Heat Transfer  (2001) 123: 645-654.
[18] He W., Deng Q., Zhou W., Gao T., Feng Z., Film Cooling and Aerodynamic Performances of a Turbine Nozzle Guide Vane with Trenched Cooling Holes, Applied Thermal Engineering (2019) 150: 150-163.
[19] Ke  Z., Wang  J., Conjugate Heat Transfer Simulations of Pulsed Film Cooling on an Entire Turbine Vane, Applied Thermal Engineering  (2016) 109: 600-609.
[20]Wang H., Tao Z., Zhou Z., Han F., Li H., Experimental and Numerical Study of the Film Cooling Performance of the Suction Side of a Turbine Blade Under the Rotating Condition, International Journal of Heat and Mass Transfer (2019) 136: 436-448.      
[21] Menter F.R., Two-Equation Eddy-Viscosity Turbulence Models for Engineering Applications, AIAA Journal (2002) 40: 254-266.
[22] Mohajer A., Zirak S., Abbasi E., Development of a Compression System Dynamic Simulation Code for Testing and Designing of Anti-Surge Control System, Energy Equipment and Systems (2019) 7: 99-110.
[23] Hylton L.D., Mihelc M.S., Turner E.R., Nealy D.A., York R.E., Analytical and Experimental Evaluation of the Heat Transfer Distribution Over the Surfaces of Turbine Vanes, NACA, Report CR-168015.
[24] Zhaoqing K., Wang J., Numerical Investigations of Pulsed Film Cooling on an Entire Turbine Vane, Applied Thermal Engineering (2015) 87: 117-126.
[25] Charmchi M., Zirak S., Numerical Simulation of Incompressible Turbulent Flow in Shrouded Disk System with Radial Outflow, Energy Equipment and Systems (2019) 7: 1-10.
[26] Hosseini Baghdad Abadi S.M., Zirak S., Rajabi Zargar Abadi M., Experimental and Numerical Investigation of Square Wave Pulsed Film Cooling Performance on a Flat Plate, Journal of Modares Mechanical Engineering (2020) 20:329-340.
[27] Hosseini Baghdad Abadi S.M., Zirak S., Rajabi Zargar Abadi M., Numerical Investigation of the Effect of Coolant Injection Angle on the Pulsed Film Cooling Effectiveness of Square Wave Flow on Flat Plate, Amirkabir Journal of Mechanical Engineering (2020) 52:161-170.
[28] Hosseini Baghdad Abadi S.M., Zirak S., Rajabi Zargar Abadi M., Numerical Study of the Effect of Rotation on the Film Cooling Effectiveness of a Turbine Blade with Square Pulsating Cooling Flow, Journal Fluid Mechanics and Aerodynamics (2019) 8: 113-130.
[29] Hosseini Baghdad Abadi S.M., Zirak S., Rajabi Zargar Abadi M., Effect of pulsating injection and mainstream attack angle on film cooling performance of a gas turbine blade, Physics of Fluids (2020) 32: 117102.