ISSN オンライン: 2688-7231
ISBN オンライン: 978-1-56700-524-0
Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India
A study on data processing techniques of expanding spherical flames at constant pressure conditions.
The goal was to quantity the uncertainties on the laminar burning velocity measured using an expanding spherical flame method due to the mixture preparation and extrapolation schemes. Data analysis was performed on the experimental data of premixed refined producer gas-air mixtures at 1-4 bar, 300K and different equivalence ratios. The error induced on the LBV due to mixture preparation was: (a) quite high for most of the mixtures due to the utilization of higher range absolute pressure transducer, (b) hydrogen rich mixture showed larger error due to its higher calorific value. Of the analysed five different extrapolation schemes to estimate unstretched LBV, NE, NQ and linear schemes were less sensitive to the range of
data available for extrapolation. The critical radius at which
hydrodynamic instability that got initiated was estimated
using an automation algorithm without any human bias. It showed that producer gas with higher mole fractions of H2 and CO preponed the onset hydrodynamic instability as compared to mixtures with larger mole fractions of CH4 due to lower values of Lewis number.