Thermal and emission characteristics of liquid Fuel flameless combustion in a forward flow combustion chamber

EasyChair Preprint 6929

Abstract

This paper presents the experimental results for a simple cylindrical combustor capable of achieving flameless combustion with liquid fuels for different thermal heat inputs of 10, 12, 14, 16, 18, 20, and 21 kW. NOx, CO and temperatures in the reaction zone are used to determine the combustion performance of the burner operated with ethanol. The fuel and air injected at ambient conditions. The tangential air inlets acted as swirlers for high swirl flows to achieve high internal recirculation rates, residence time, and increased dilution of the incoming reactants in the reaction zone, resulting in flameless combustion mode. Ethanol is injected axially through a nozzle located symmetrically while air tangentially through 12 nozzles across the combustor length. Results showed that by spreading the tangential air inlets across the combustor length, the swirl strength reduced and evenly distributed circumferentially across the entire length of the combustor. As a result, good combustion performance in flameless combustion mode was achieved with a low peak temperature and uniformly distributed in the whole reaction zone. The uniform temperature distribution in the furnace reduced NOx to 3.6 ppm and CO emissions to 15 ppm at Φ of 0.9.

Keyphrases: Forward flow, Liquid fuel, flameless combustion, low emissions, temperature uniformity

@booklet{EasyChair:6929,
  author    = {Mohammed Bashir Abdulrahman and Mazlan Abdul Wahid and Ali Asmayou and Adam Kasani and Mohd Fairus Mohd Yasin and Md. Mizanur Rahman},
  title     = {Thermal and emission characteristics of liquid Fuel flameless combustion in a forward flow combustion chamber},
  howpublished = {EasyChair Preprint 6929},
  year      = {EasyChair, 2021}}