Abstract
The first implementation of a combined laser absorption diagnostic/gas chromatography (GC) sampling system for the measurement of combustion-relevant species in a conventional shock tube configuration is reported. A heated, sidewall sampling system is used to extract a post-shock sample for GC analysis. Analysis of the gas sample yields a measurement of the ultimate mole fraction values of multiple species (ethylene, acetylene, hydrogen, and methane) at the end of the reflected shock test time. A 10.532-µm laser absorption diagnostic is used to measure time-resolved ethylene. The simultaneous in situ optical measurement allows for a comparison of the sampled and optically measured results. Sample dilution and non-reactive shock experiments were carried out to validate the accuracy of the sidewall-sampling technique. The combined optical and sampled-gas measurement techniques were then used to study ethylene pyrolysis (1.0% mole fraction ethylene/argon) at approximately 5 atm, over a range of temperatures (1200-2000 K). The results obtained using both measurement techniques show close agreement.
| Original language | English (US) |
|---|---|
| State | Published - 2017 |
| Externally published | Yes |
| Event | 10th U.S. National Combustion Meeting - College Park, United States Duration: Apr 23 2017 → Apr 26 2017 |
Other
| Other | 10th U.S. National Combustion Meeting |
|---|---|
| Country/Territory | United States |
| City | College Park |
| Period | 4/23/17 → 4/26/17 |
All Science Journal Classification (ASJC) codes
- General Chemical Engineering
- Physical and Theoretical Chemistry
- Mechanical Engineering
Keywords
- Ethylene pyrolysis
- Gas chromatography (GC)
- Laser absorption
- Shock tube