Registration of the Ignition of A Combustible Mixture in a Shock Tube Using a Thermoelectric Detector

The possibility of using a thermoelectric detector (TD) to measure the ignition delay time of a combustible mixture behind the front of a reflected shock wave is demonstrated. This device has already been used to record heat flows in shock tubes and is used for the first time to record the process of ignition of combustible mixtures. In the course of experiments with propane-air mixtures, it is found that the TD is capable of recording high heat flows, low inertia, high signal-to-noise ratios, and high time resolution. It is also shown that, due to the faster response time, the use of the sensor makes it possible to refine the ignition delay time of the mixture, and the sensor itself can serve as a useful device for studying the ignition processes of combustible mixtures in shock tubes in more detail.

Automated summary

This study demonstrates the possibility of using a thermoelectric detector to measure the ignition delay time of a combustible mixture. The detector shows high recording capabilities for heat flows, low inertia, high signal-to-noise ratios, and high time resolution. It also allows for a more detailed study of the ignition process of combustible mixtures in shock tubes due to its faster response time.