|
|
|
| Combustion gas temperature measurement based on dual comb absorption spectroscopy |
|
|
|
|
Abstract Flame temperature measurement is a much talked about test technology issue, from contact to non-contact measurement, laser spectroscopy diagnostic methods are now becoming the mainstream, of which dual optical comb absorption spectroscopy is today's cutting-edge research direction because of its wide spectral range, fast measurement speed, high signal-to-noise ratio, and no need for mechanical structure. Most of the current research is in the use of this technique to measure the temperature of gases such as methane, failing to measure the flame directly. In this paper, the stability of dual optical comb spectroscopy is first evaluated, and the overall spectral stability is within 2%, and then with the combustion absorption device, the absorption signal through the flame is captured in a continuous mode, and combined with the double line absorption method, the average temperature of the absorption path is initially calculated, and the temperature distribution is obtained, which is compared with the thermocouples, and the temperature trend is basically the same, which provides a reference for the accurate measurement of the flame temperature.
|
|
Received: 01 November 2024
Published: 03 April 2025
|
| Fund:National Natural Science Foundation of China;National Key Research and Development Program of China |
|
|
|
|
|
|
2025, Vol. 46 
