| This paper reviews the key parameter testing techniques for air-breathing pulse detonation engines under unsteady combustion conditions, focusing on four aspects: combustion organization, combustion chamber, component matching, and overall system performance. For combustion organization, it introduces methods for measuring detonation wave pressure and gas velocity, discussing the application of piezoelectric and piezoresistive sensors as well as optical techniques, along with their challenges in high-temperature and high-frequency environments. In combustion chamber research, it analyzes measurement techniques for boost ratio and combustion efficiency, proposing high-precision measurement solutions based on mass-weighted averaging methods and optical technologies. In the component matching aspect, dynamic testing methods for turbine speed and efficiency are examined, uncovering the causes of unsteady turbine efficiency degradation and offering optimization design recommendations. For overall system performance, the paper summarizes advancements in thrust measurement techniques, highlighting significant accuracy improvements achieved through dynamic system parameter identification and deconvolution techniques. Finally, future research directions are proposed, emphasizing the importance of multi-parameter joint measurement, dynamic response optimization, and high-precision real-time analysis to support air-breathing pulse detonation engines performance enhancement and engineering applications. |
