Numerical Investigation Of The Effect of Plasma Actuator on Film Cooling Effectiveness

Document Type : Research Article

Authors

Faculty of Technology and Engineering, Guilan University, Guilan, Iran

Abstract

In this paper, a 2-D numerical approach was conducted for analyzing incompressible,turbulent and steady flow and thermal fields of the film cooling through using plasma actuator over a flat plate model. Simulations were implemented using non uniform structured grid and low-Re k-ε turbulence model. The present study was analyzed at 35 degree injection angle, hole length-to-diameter ratio (L/D) 5 and density ratio (DR) 1.2, with the present of plasma actuator. The flow and temperature fields were investigated with different blowing ratios and applied voltages. In addition, the effect of geometry parameters and position of plasma actuator has been studied on the adiabatic film cooling effectiveness. Based on the numerical analysis results, the effect of plasma actuator on film cooling effectiveness is better in lower blowing ratios and higher applied voltages and positions near the film hole. Unlike other similar works in this filed, this study has examined geometry parameters of plasma actuator and their effect on adiabatic film cooling effectiveness. These parameters include electrode gap distance and dielectric thickness. The results show that higher thickness has low effect on improving of film cooling effectiveness. But when electrode gap distance decreases, the performance of plasma actuator and average effectiveness enhances.

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References

[1] A. Sinha, D. Bogard, M. Crawford, Film-cooling effectiveness downstream of a single row of holes with variable density ratio, ASME J. Turbomach, 113(3) (1991) 442-449.
[2] J. Pietrzyk, D. Bogard, M. Crawford, Hydrodynamic measurements of jets in crossflow for gas turbine film cooling applications, ASME J. Turbomach, 111(2) (1989)139-145.
[3] D.K. Walters, J.H. Leylek, Impact of film–cooling jets on turbine aerodynamic losses, in: ASME , Journal of turbomechinary, American Society of Mechanical Engineers, 2000, pp. 537-545.
[4] M. Naghashnejad, N. Amanifard, H. Deylami, A predictive model based on a 3-D computational approach for film cooling effectiveness over a flat plate using GMDH-type neural networks, Heat and Mass Transfer, 50(1) (2014)139-149.
[5] A. Bergles, Techniques to enhance heat transfer, Handbook of heat transfer, 3 (1998) 11.11-11.76.
[6] T.C. Corke, M.L. Post, D.M. Orlov, Single-dielectric barrier discharge plasma enhanced aerodynamics:concepts, optimization, and applications, Journal of Propulsion and Power, 24(5) (2008) 935-945.
[7] Y. Suzen, P. Huang, J. Jacob, D. Ashpis, Numerical simulations of plasma based flow control applications, AIAA paper, 4633 (2005) 2005.
[8] B. Jayaraman, Y. Lian, W. Shyy, Low-Reynolds number flow control using dielectric barrier discharge actuators, AIAA paper, 3974 (2007).
[9] B. Jayaraman, W. Shyy, Modeling of dielectric barrier discharge-induced fluid dynamics and heat transfer, Progress in Aerospace Sciences, 44(3) (2008) 139-191.
[10] M. Malik, L. Weinstein, M. Hussaini, Ion Wind Drag Reduction, AIAA paper, 0231 (1983).
[11] M. Forte, J. Jolibois, J. Pons, E. Moreau, G. Touchard, M.Cazalens, Optimization of a dielectric barrier discharge actuator by stationary and non-stationary measurements of the induced flow velocity: application to airflow control, Experiments in Fluids, 43(6) (2007) 917-928.
[12] S. Seyyed ShamsTaleghani, A. Shadaram, M. Mirzaee, Experimental investigation of geometric and electrical characteristics by measurements of the induced flow velocity, (2013) 132-145(in Persian).
[13] A. Rafi, N. Amanifard, H.M. Deylami, F. Dolati, Numerical investigation of the plasma actuator effects on the flow field and heat transfer coefficient in a flat channel, Modares Mechanical Engineering, 15(6) (2015)(in Persian).
[14] C.-C. Wang, S. Roy, Active cooling of turbine blades using horse-shoe plasma actuator, AIAA Paper, 679 (2009) 2009.
[15] C.-C. Wang, S. Roy, Physics based analysis of horseshoe plasma actuator for improving film cooling effectiveness, AIAA Paper, 1092 (2010) 2010.
[16] J.-L. Yu, L.-m. He, Y.-f. Zhu, W. Ding, Y.-q. Wang, Numerical simulation of the effect of plasma aerodynamic actuation on improving film hole cooling performance, Heat and Mass Transfer, 49(6) (2013) 897-906.
[17] B. Launder, B. Sharma, Application of the energydissipation model of turbulence to the calculation of flow near a spinning disc, Letters in heat and mass transfer,1(2) (1974) 131-137.
Amirkabir Journal of Mechanical Engineering
Volume 49, Issue 3
November 2017
Pages 605-616

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