Gas Temperature Measurement in a DME-HCCI Engine using Heterodyne Interferometry with Spark-Plug-in Fiber-Optic Sensor 2007-01-1848
Non-intrusive measurement of transient unburned gas temperatures was developed with a fiber-optic heterodyne interferometry system. Using the value of the Gladstone-Dale constant for DME gas and combustion pressure we can calculate the in-cylinder temperature inside unburned and burned region. In this experimental study, it was performed to set up a fiber-optic heterodyne interferometry technique to measure the temperature before and behind the combustion region in a DME-HCCI engine. At first, measured temperature was almost the same as the temperature history assuming that the process that changes of the unburned and the burned are polytropic. In addition, we measured the temperature after combustion which of condition was burned gas with DME-HCCI combustion. The developed heterodyne interferometry used the spark-plug-in fiber-optic sensor has a good feasibility to measure the unburned and burned temperature history.
Citation: Lee, C., Kawahara, N., Tomita, E., and Inoshita, K., "Gas Temperature Measurement in a DME-HCCI Engine using Heterodyne Interferometry with Spark-Plug-in Fiber-Optic Sensor," SAE Technical Paper 2007-01-1848, 2007, https://doi.org/10.4271/2007-01-1848. Download Citation