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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Thank you for your attention !!!