Frequency-Domain Analysis for Pulsating Combustion of Gaseous Fuel / Berg I. A.,Porshnev S. V.,Oshchepkova V. Y.,Medvedev A. N. // . - 2017. - V. 1836, l. .

ISSN/EISSN:

0094-243X / нет данных

Type:

Proceedings Paper

Abstract:

Pulsating combustion is among combustion control methods used to suppress formation of NOx. Past experiments showed that the dependency of NOx content from pulsation rate has a minimum. A measuring unit was set up to study torch behavior in infrared band. To study pulsating combustion of gaseous fuel a thermographic camera was used. Thermographic sequences were recorded using the instrument FLIR 7700M with the resolution of 320x240 pixels at the frame rate of 412 Hz. The experiments resulted in obtaining thermographic sequences radiation intensity fields in the longitudinal section of the torch at different pulsation rates. The obtained raw data was preprocessed to obtain distributions of quantities of pixels corresponding to temperatures in each frame, as well as time-domain series for changes of the torch core longitudinal section area. Frequency-domain analysis was run for each time-domain series using Fast Fourier transform (FFT). The results demonstrate that the first maximum of spectral density coincides with the control action rate. The spectrum also contains pronounced second and third harmonics. For each spectrum of the time-domain series signal-to-noise ratio (SNR) was calculated. Comparison of different SNR shows that maximum impact of pulsation control on torch radiation intensity takes place at the on/off valve opening rate of 4 Hz. This method of torch diagnostics can be helpful for future studies and development of pulsating combustion control systems.

Author keywords:

Thermal imager; pulsating torch; NOx reduction; Frequency-domain analysis; FFT analysis; Time series

DOI:

10.1063/1.4981976

Web of Science ID:

ISI:000409539000036

Соавторы в МНС:

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Другие поля

Поле	Значение
Editor	Ntalianis, K
Booktitle	APPLIED MATHEMATICS AND COMPUTER SCIENCE
Series	AIP Conference Proceedings
Note	1st International Conference on Applied Mathematics and Computer Science (ICAMCS), Rome, ITALY, JAN 27-29, 2017
Publisher	AMER INST PHYSICS
Address	2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
Language	English
Article-Number	UNSP 020036-1
ISBN	978-0-7354-1506-5
Research-Areas	Computer Science; Mathematics; Physics
Web-of-Science-Categories	Computer Science, Interdisciplinary Applications; Mathematics, Applied; Physics, Applied
Author-Email	berg77777@gmail.com sergey\_porshnev@mail.ru valeoupi@gmail.com alnikmed52@gmail.com
ResearcherID-Numbers	Medvedev, Alexander/J-2493-2017
ORCID-Numbers	Medvedev, Alexander/0000-0002-5160-2816
Number-of-Cited-References	7
Doc-Delivery-Number	BI2OY