The effects of jet flow-rate modulation were investigated in the case of a 35 deg inclined jet in cross-flow over a flat plate using Mie scattering visualizations, time-resolved flow rate records, and large eddy simulations (LES). An unforced jet study was conducted over a wide range of blowing ratios to provide a baseline for comparison to the pulsed results. The two distinct and well known steady jet regimes (attached jet with high film cooling performance for BR < 0.4 and detached jet with poor film cooling performance for BR > 1.0) were related to the dynamics of characteristic vortical structures, significant in the transition from one regime to the other. Similarity of the inclined jet results with a past vertical jet study are also put in perspective when comparing wall adiabatic effectiveness results. 3D proper orthogonal decomposition (3D-POD) was performed on LES results of an unforced case at BR = 0.15 to provide an analysis of dominant modes in the velocity and temperature fields. Error calculations on the reconstructed fields provided an estimation of the number of modes necessary to obtain satisfactory reconstruction while revealing some of the shortcomings associated with POD.
Skip Nav Destination
Article navigation
March 2013
Research-Article
Study of Unforced and Modulated Film-Cooling Jets Using Proper Orthogonal Decomposition—Part I: Unforced Jets
Clementine Vézier,
Dimitris E. Nikitopoulos
Dimitris E. Nikitopoulos
e-mail: medimi@lsu.edu
Turbine Innovation and Energy Research
(TIER) Center
Mechanical Engineering Department,
Turbine Innovation and Energy Research
(TIER) Center
Mechanical Engineering Department,
Louisiana State University
,Baton Rouge, LA 70803
Search for other works by this author on:
Guillaume Bidan
e-mail: gbidan3@lsu.edu
Clementine Vézier
e-mail: clemvezier@gmail.com
Dimitris E. Nikitopoulos
e-mail: medimi@lsu.edu
Turbine Innovation and Energy Research
(TIER) Center
Mechanical Engineering Department,
Turbine Innovation and Energy Research
(TIER) Center
Mechanical Engineering Department,
Louisiana State University
,Baton Rouge, LA 70803
Contributed by the International Gas Turbine Institute (IGTI) of ASME for publication in the JOURNAL OF TURBOMACHINERY. Manuscript received October 6, 2011; final manuscript received October 29, 2011; published online November 8, 2012. Editor: David Wisler.
J. Turbomach. Mar 2013, 135(2): 021037 (11 pages)
Published Online: November 8, 2012
Article history
Received:
October 6, 2011
Revision Received:
October 29, 2011
Citation
Bidan, G., Vézier, C., and Nikitopoulos, D. E. (November 8, 2012). "Study of Unforced and Modulated Film-Cooling Jets Using Proper Orthogonal Decomposition—Part I: Unforced Jets." ASME. J. Turbomach. March 2013; 135(2): 021037. https://doi.org/10.1115/1.4006599
Download citation file:
Get Email Alerts
Related Articles
Unsteady Structure and Development of a Row of Impingement Jets, Including Kelvin–Helmholtz Vortex Development
J. Fluids Eng (May,2015)
Study of Unforced and Modulated Film-Cooling Jets Using Proper Orthogonal Decomposition—Part II: Forced Jets
J. Turbomach (March,2013)
The Effect of Rib Turbulators on Film Cooling Effectiveness of Round Compound Angle Holes Fed by an Internal Cross-Flow
J. Turbomach (December,2016)
Regular Structures in a Plane Triple Jet
J. Fluids Eng (March,1983)
Related Proceedings Papers
Related Chapters
The MCRT Method for Participating Media
The Monte Carlo Ray-Trace Method in Radiation Heat Transfer and Applied Optics
Modeling Grain Boundary Scattering in Nanocomposites
Inaugural US-EU-China Thermophysics Conference-Renewable Energy 2009 (UECTC 2009 Proceedings)
Model and Simulation of Low Elevation Ground-to-Air Fading Channel
International Conference on Instrumentation, Measurement, Circuits and Systems (ICIMCS 2011)