THERMAL SCIENCE
International Scientific Journal
Thermal Science - Online First
online first only
Study of flow and heat transfer for pulsating film cooling by dynamic modal decomposition
ABSTRACT
The effect of pulsating jet on the unsteady film cooling performance was studied by experimental and numerical simulation. The FLIR thermal infrared thermal camera was used the measure the adiabatic temperature of the surface. The Large Eddy Simulation was conducted for analyzing the adiabatic film cooling effectiveness at four different jet nondimensionalized pulsated frequency of St=0, 0.1, 0.2, and 0.3. The DMD dynamic mode analysis of both the velocity and temperature fields obtained by numerical calculation was performed to obtain the coupling relationship between the flow and heat transfer. Results show thatthe cooling effectiveness of steady film cooling (St=0) decreases with the increase of blowing ratio. At low blowing ratio (M=0.65), the cooling efficiency of the pulsating jet is significantly lower than the steady-state jet. At the blowing ratio of 1.0 and 1.5, the cooling efficiency of the low frequency pulsating jet (St=0.1) is a little higher than the steady state jet, indicating that the low frequency pulsation under the high blowing ratio can improve the coverage of the cooling air. At high pulsating frequency (St=0.3), the cooling effectiveness is obviously declined.
KEYWORDS
PAPER SUBMITTED: 2023-09-25
PAPER REVISED: 2023-12-01
PAPER ACCEPTED: 2023-12-12
PUBLISHED ONLINE: 2024-02-18
- Goldstein R J . Film Cooling, Advances in Heat Transfer, (1971), 7, pp.321-379.
- Ahn, Joon. Large Eddy Simulation of Film Cooling: A Review, Energies, 15(2022),23, pp.8876.
- Oliver T.A., Bogard D.G., Moser R.D., Large eddy simulation of compressible, shaped-hole film cooling, International Journal of Heat and Mass Transfer, 140(2019), pp.498-517.
- Yuefeng Li, Huazhao Xu, Jianhua Wang, Junqiang Zhu, Yun Chen, Large Eddy Simulation of trenched cylindrical film hole with backward compound angles, International Journal of Thermal Sciences, 184(2023), pp.107910.
- Hosseini, S.M., Zirak S., Zargarabadi, M.R., Pulsed film cooling on a complete turbine blade: steady, sinusoidal and square injections, J. Therm Anal Calorim, 148(2023), pp.9761-9783.
- F. Muldoon, S. Acharya, DNS study of pulsed film cooling for enhanced cooling effectiveness, Int. J. Heat Mass Transf, 52(2009), pp.3118-3127.
- Bons, J.P., Rivir, J.B., Mac Arthur, C.D., et al., The Effect of Unsteadiness on Film Cooling Effectiveness, Wright Laboratory, Report No. WL-TR-96-2096, 1995.
- Sultan, Qaiser, Lalizel, et al. Influence of Coolant Jet Pulsation on the Convective Film Cooling of an Adiabatic Wall, Journal of heat transfer: Transactions of the ASME, 139(2017), pp.022201.
- Coulthard S.M., Volino R.J., Flack K.A., Effect of Jet Pulsing on Film Cooling-Part I: Effectiveness and Flow-Field Temperature Results, Journal of Turbomachinery, 2006.
- Ekkad S.V.,Ou S., Rivir R.B., Effect of Jet Pulsation and Duty Cycle on Film Cooling From a Single Jet on a Leading Edge Model, Journal of Turbomachinery, 128(2006), 3, pp.564-571.
- Foroutan, Hosein, Yavuzkurt, et al., Numerical Simulations of the Near-Field Region of Film Cooling Jets Under High Free Stream Turbulence: Application of RANS and Hybrid URANS/Large Eddy Simulation Models, Journal of heat transfer: Transactions of the ASME, 137(2015), 1.
- Dupuy, Dorian, et al. Boundary-condition models of film-cooling holes for large-eddy simulation of turbine vanes, International Journal of Heat and Mass Transfer, 166(2021), 2, pp.120763.
- Hamzehloo, ArashLusher, et.al., On the performance of WENO/TENO schemes to resolve turbulence in DNS/LES of high-speed compressible flows, International Journal for Numerical Methods in Fluids, 93(2021), 1.
- Schmidt, P.J., Dynamic Mode Decomposition of Numerical and Experimental Data, J. Fluid. Mech., 656(2010), pp.5-28.
- Kutz J.N., Nathan J., Brunton S.L., et al., Dynamic mode decomposition: data-driven modeling of complex systems, Soc. Ind. Appl. Math., 2016.
- Rowley C.W., Igor M., Shervin B., et al. Spectral analysis of nonlinear flows, J. Fluid Mech., (2009).
- Kou J.Q, Zhang W.W. Dynamic mode decomposition and its applications in fluid dynamics, Acta Aerodynamica Sinica, 36(2018), 2, pp.163-179.
- Kalghatgi P., Acharya S., Modal Analysis of Inclined Film Cooling Jet Flow, J. Turbomach., 136(2014), 8, pp.081007.
- Wu, Zhao, et al., Proper orthogonal decomposition and dynamic mode decomposition of jet in channel crossflow, Nuclear Engineering and Design, 344(2019), 4, pp.54-68.
- Schmid P.J., Li L., Juniper M.P., et al., Applications of the dynamic mode decomposition, Theoretical & Computational Fluid Dynamics, 25(2011), 4, pp.249-259.