| Citation: | DING Hongbing, LI Yiming, LI Jinxia, et al. Adaptability of high-frequency response characteristic model for micro probe-transducer system[J]. Journal of Beijing University of Aeronautics and Astronautics, 2019, 45(8): 1519-1528. doi: 10.13700/j.bh.1001-5965.2019.0104(in Chinese)
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To broaden the available bandwidth of micro probe transducer system and improve the measurement accuracy of high-frequency pressure signal, it is important to study the frequency response characteristic and analyze the application scope and prediction accuracy of the mathematic models for different probe-transducer system structures. In this study, the probe-transducer system structure was divided into five typical types. Then, the frequency response prediction models, and assumed conditions and updating methods of the existing probe-transducer system were summarized. To evaluate the theoretical mathematic models' prediction accuracy quantitatively, the resonant frequency, cut-off frequency and working band (amplitude error ±5%) for probe-transducer system with different structures were extracted by mathematic models and compared with the CFD and experimental results. For the resonator whose probe is shorter, the Panton model can be used and the error can be controlled within 1%. For the structure whose probe is longer and the structure with pressure hole, the B-T model is the most accurate. Finally, the probe-transducer system was optimized to study the self-excited oscillation phenomenon in supersonic condensation. The results show that the frequency response characteristic of the optimized probe-transducer system can meet the requirement of dynamic measurement for the high-frequency (about 10 kHz) fluctuating pressure signal.
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