Investigation of Effects of Ignition Improvers on Ignition Delay Time of Ethanol Combustion with Rapid Compression and Expansion Machine

Paper #:
  • 2012-01-0854

Published:
  • 2012-04-16
Citation:
Munsin, R., Laoonual, Y., Jugjai, S., Matsuki, M. et al., "Investigation of Effects of Ignition Improvers on Ignition Delay Time of Ethanol Combustion with Rapid Compression and Expansion Machine," SAE Technical Paper 2012-01-0854, 2012, https://doi.org/10.4271/2012-01-0854.
Pages:
11
Abstract:
This work investigates the effects of ignition improvers on the ignition and combustion characteristics of hydrous ethanol with 5% by weight water and 1% by weight Lauric acid (Eh95) under simulated diesel engine conditions using the rapid compression and expansion machine (RCEM). Results indicate that hydrous ethanol with commercial additive (ED95) and hydrous ethanol with 5% by weight glycerol ethoxylate in hydrous ethanol exhibit a near identical rate-of-pressure-rise and heat release rate. Ignition delay of hydrous ethanol with 5% by weight glycerol ethoxylate is shorter, but hydrous ethanol with 1% by weight glycerol ethoxylate has longer ignition delay time and different combustion characteristics compared with hydrous ethanol with commercial additive (ED95). Hydrous ethanol with 1% by weight glycerol ethoxylate and hydrous ethanol with 5% by weight glycerol ethoxylate are considered suitable fuels for high compression-ratio diesel engines. Ignition and combustion characteristics of hydrous ethanol with 5% by weight DEE and hydrous ethanol with 5% by weight biodiesel are similar to hydrous ethanol with 5% by weight water and 1% by weight Lauric acid (Eh95), with the longest ignition delay and the highest peak rate-of-pressure-rise of tested fuels.
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