Bekaert Sa · EURONEXT:BEKB
Bekaert Sa — Technical Presentation (2015)
16 slides from Bekaert Sa's technical presentation, 2015
Slide 1: Transfer Function Calculations of Segregated Elements in a Simplified Slit Burner with Heat Exchanger
Transfer Function Calculations of Segregated Elements in a Simplified Slit Burner with Heat Exchanger Naseh Hosseini V. Kornilov, O. J. Teerling, I. Lopez Arteaga and L. P. H. de Goey
Slide 2: Motivation
Motivation Setup Simulations Future Created using www.wordle.net 2
Slide 3: Motivation
Motivation Setup Simulations Future Image courtesy of Slant / Fin Corp. 3
Slide 4: Setup
Motivation Setup Simulations Future 4
Slide 5: Setup
Motivation Setup Simulations Future 5
Slide 6: Setup
Motivation Setup Simulations Future 6
Slide 7: Element Heat Transfer Rate (W)
Motivation Setup Simulations Future 5000 4500 4612 Element Heat Transfer Rate (W) 4000 3500 3000 2500 2000 1663 1500 1000 15 500 0 Flame Hex Deck 7
Slide 8: Simulation results of heat and velocity
6.3 4700 Motivation Setup 6.2 Simulations Future 4600 6.1 Q-Hex (W) V-Out (m/s) 1725 5000 6.6 4.9 1710 4.8 6.5 4900 1695 4.7 6.4 4800 1680 4.6 6.3 1665 4700 4.5 6.2 1650 4600 4.4 6.1 19 Q-Flame (W) V-PreHex (m/s) 5000 172518 0.98 6.6 4.9 0.97 6.5 4900 171017 4.8 0.96 1695 6.4 4.7 0.95 4800 16 168015
Slide 9: Normalized gain and heat
Motivation Setup Simulations Future Q-Flame Q-Hex Q-Deck V1V1 V2 V2 V3 V3 V4 V4 V5 V5 V6 1.30 1.30 1.040 0.8 Normalized Hex Heat 1.25 1.25 1.035 0.7 Normalized Gain 1.030 Normalized Heat 1.20 1.20 0.6 17 W Gain 1.15 1.15 1.025 0.5 1.020 1.10 4841 W 1.10 0.4 1.015 1.05 1.05 0.3 1.010 1.00 1.00 1.005
Slide 10: Transfer Function
Motivation Setup Simulations Future Transfer Function Q flame Qhex TFtotal TF Q flame Q hex TF total total 10
Slide 11: Transfer Function gain and phase
Motivation Setup Simulations Flame Hex Total Future Flame+Hex 1.75 1.50 1.25 Transfer Function Gain 1.00 0.75 0.50 0.25 0.00 0 100 200 300 400 500 600 700 800 900 Frequency (Hz) Gain Phase Flame Hex Total Flame+Hex Flame Total Flame+Hex Hex 1.75 0 0.00 1.50 -1 -0.02 Phase/Pi (rad) 1.25 -2 -0.04 Gain
Slide 12: Relative excitation amplitude
Motivation Setup Simulations Future Vin total flame hex Vin Vin kin Vin sin(t ) Q f Q f k f Q f sin(t ) k f Q f kh Qh ktotal Qh Qh kh Qh sin(t ) Q f Qh Qtotal Qtotal ktotal Qtotal sin(t ) kj = relative excitation amplitude of element j → gain = kj / kin 12
Slide 13: Muu of Transfer Matrix
Motivation Setup Simulations Future Muu of Transfer Matrix 1 0 1 0 1 0 1 0 0 M 0 M M uu flame 0 M uuhex uu flame uuhex 0 M uutotal TM flame TM hex TM flame*hex TM total 13
Slide 14: Muu of Transfer Matrix
8 Motivation Setup Simulations 7 6 Future 5 4 Gain 3 2 Muu of Transfer Matrix 1 0 0.96 -1 0.92 -2 0.88 -3 0.84 0 100 200 300 400 500 600 700 800 900 Frequency (Hz) Gain Phase Flame Hex Total Flame*Hex Flame Hex Hex Total Flame*Hex 8 1 0.02 7 6 0 Phase/Pi (rad) 5 4 -1 Gain 3 2 -2 1 -3 0 0.96 -1 0.92
Slide 15: Simulations and experiments of intense interactions between flame and hex
Motivation Setup Simulations Future Simulations and experiments of intense interactions between flame and hex 15
Slide 16: Acknowledgement: Marie Curie TANGO network
The presented work is part of the Marie Curie Initial Training Network Thermo-acoustic and aero-acoustic nonlinearities in green combustors with orifice structures (TANGO). We gratefully acknowledge the financial support from the European Commission under call FP7- PEOPLE-ITN-2012.