1. Task 2.2: Analytical study of laminar dump combustor
Nalini Kanta Mukherjee
Keele University, U.K.
Research Supervisor: Prof. Maria Heckl

2. Personal background Home country: India
Master of Engineering: Indian Institute of Science, Bangalore, India
Employment history: Ashok Leyland, India
Joined TANGO project: September-2013
N. K. Mukherjee, Keele University

3. Objective of the current project
Fig 1: combustor section demonstrating flame and flame holder
N. K. Mukherjee, Keele University

4. Subsections of the project
Part 1:
Calculation of the combustor resonance frequency
Part 2:
Understand the flame-acoustic coupling within the combustor
Study of the combustor instability frequencies
N. K. Mukherjee, Keele University

5. Part 1: 1-D Mathematical model of combustor
Fig 2: Schematic of a combustor
N. K. Mukherjee, Keele University

6. Calculation of the resonance frequency
Resonance frequency calculated using continuity equations and boundary conditions
Question: How does resonance frequency change with respect to
Blockage inside the combustor
Area expansion within the combustor
Temperature rise within the combustor
N. K. Mukherjee, Keele University

7. Part 1: Current status
Mathematical model prepared to calculate the combustor resonance frequency
Effect of different combustor parameters (e.g. blockage, area expansion, temperature jump) on resonance frequency have been analysed
Need to validate the results with experimental data
N. K. Mukherjee, Keele University

8. Part 2: Flame-acoustic coupling within combustor
Experimental setup (ref Vishnu R., IIT Madras, 2013):
Fig 4: Schematic of a V-flame combustor
N. K. Mukherjee, Keele University

9. Flame-acoustic coupling within combustor
Capture flame-images
Calculate surface area/ heat release rates
Fig 5: Flame images before and after application of filter
N. K. Mukherjee, Keele University

10. Flame-acoustic coupling within combustor
Focus will also be on instability frequencies
Fig 6: Fast Fourier Transform of pressure signal
N. K. Mukherjee, Keele University

11. Part 2: Current status
Background literature studied and results reproduced
Need to perform experiments to capture better quality flame images
Heat release rate to be calculated for different dynamical states within combustor
Combustor instability frequencies to be studied in larger detail
N. K. Mukherjee, Keele University

12. Training modules attended at Keele University
Managing our research
Techniques to do a proper literature review
Improving oral and poster presentation skill
Sources of funding in research
How to publish and protect research
Technical modules:
Applied mathematics seminars
N. K. Mukherjee, Keele University

13. TANGO workshops attended
1st Workshop on Communication and Outreach (September 2013)
Workshop on Experimental Methods in Thermo-acoustics (February 2014)
Work Package 1 meeting (March 2014)
Workshop on Aero-acoustics in Confined Flows of Low Mach Number (May 2014)
Workshop on Gender Issues (May 2014)
N. K. Mukherjee, Keele University

14. Conferences and publications
Presented work at ICSV conference, held in Beijing in July 2014
Topic of the paper, ‘Analysis of modal frequencies of tubes with internal constriction using the blockage integral’
N. K. Mukherjee, Keele University

15. Secondment plans
Planned secondment at IIT Madras, India, between October 2014 and January 2015
Will perform experiments to capture images of V- flames
N. K. Mukherjee, Keele University

16. Career plans
Continue research work in technical-acoustics after completion of PHD
N. K. Mukherjee, Keele University

17. Thank you for your attention !!!