基于称重法的微型涡喷发动机燃油流量测量方法研究

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中图分类号：V216.8；TB9 文献标志码：A 文章编号：1674-5124（2025）09-0057-09

Abstract： To address the challenge accurately measuring small fuel flow rates in real-time during micro turbojet engine bench tests， a method based on the weighing technique is proposed. The system comprises a bridge-type cantilever beam sensor， a high-resolution £-△ ADC，an ESP32-based embedded platform， LabVIEW-based host stware.By combining high-precision mass measurement the fuel tank， a queuebased algorithm， a second-order Buterworth low-pass filter，real-time fuel flow measurement within a defined time window is achieved. Test results show that within the designed weighing range，the full-scale mass measurement erroris within 0.052% .At anupdate rate 10Hz， thesystem achieves pressure-loss-free flow measurement over the full operating range the engine， with a ful-scale flow error not exceeding 0.641% . Under low-vibration test conditions，the full-scale flow error is further reduced to 0.086% demonstrating consistently high performance across various scenarios.

Keywords： micro turbojet engine; smallfuel flow measurement; weighing technique; real-time measurement; bench testing

0 引言

航空发动机台架试验测试是评估发动机性能的重要工作。（剩余10776字）