Name:
Zhu et al.-AIAA P&E 2020.pdf
Size:
8.924Mb
Format:
PDF
Description:
Accepted manuscript
Type
Conference PaperKAUST Department
Clean Combustion Research CenterMechanical Engineering Program
Physical Science and Engineering (PSE) Division
high-pressure combustion (HPC) Research Group
KAUST Grant Number
BAS/1/1370-01-01Date
2020-08-17Online Publication Date
2020-08-17Print Publication Date
2020-08-24Permanent link to this record
http://hdl.handle.net/10754/664795
Metadata
Show full item recordAbstract
This work describes the stability characteristics of an actively-valved pulse combustor through experimental methods. An ion probe detected the combustion events and a pressure sensor measured the pressure wave in the combustion chamber. By decreasing the injected fuel flow rate to approach near blow-out limit and fixing the value frequency to 270 Hz, the stability characteristics of the pulse combustor was studied systematically. The time and frequency domains of the ion and pressure data show that with decreased fuel flow rate, the ion and pressure signals amplitude decrease, time traces show some discontinuity, and low frequency oscillations appear. We then quantified the stability characteristics by introducing two indexes: the integrated power spectrum density (PSD) and PSD ratio. The indexes provide direct evidence showing that the low frequency oscillation governs the combustion dynamics when approaching blowout limit. The strong low frequency oscillation is treated as the symptom of the near blowout. The present study can be used to guide the operation of the pulse combustor and avoid low frequency oscillations.Citation
Zhu, X., Lisanti, J. C., Guiberti, T., & Roberts, W. L. (2020). Stability Characteristics of an Actively-valved Pulse Combustor. AIAA Propulsion and Energy 2020 Forum. doi:10.2514/6.2020-3851Sponsors
The research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST), under award number BAS/1/1370-01-01.ISBN
9781624106026Additional Links
https://arc.aiaa.org/doi/10.2514/6.2020-3851ae974a485f413a2113503eed53cd6c53
10.2514/6.2020-3851