Research on fuel dynamic flow measurement technology for aero-engine based on laminar flow meter

被引：0
|
作者：
Wang X. [1 ]
Chen Y. [1 ]
Jiang Y. [1 ]
机构：
[1] School of Power and Energy, Northwestern Polytechnical University, Xi'an
来源：
Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument | 2021年 / 42卷 / 03期
关键词：
Aero-engine; Dynamic measurement; Fuel; Laminar flow element; Transient state;
D O I：
10.19650/j.cnki.cjsi.J2107318
中图分类号：
学科分类号：
摘要：
In order to solve the problem of aero-engine fuel measurement in transient state, the dynamic flow measurement technology of aero-fuel flow based on laminar flow meter (LFM) was studied. A liquid LFM with a range of 0~3 000 mL/min was designed. The LFM was tested on a small turbojet-engine test bench and compared with a coriolis mass flowmeter (CMF). The test results show that the LFM has excellent dynamic characteristics. When the engine is in a steady state, the LFM measurement results are in good agreement with those of the CMF, and the relative error is -1.25%~1.16%, which is consistent with the relative error of -1.24%~1.26% when the LFM is calibrated. When the engine is in a transition state, the liquid LFM can follow the oil pressure after pump well, while the CMF cannot follow the oil pressure after the pump and there is a lag of about 2 s. The measurement result of the LFM can be consistent with the control logic during starting and acceleration/deceleration. The study in this paper provides valuable references for the research of aero-engine test technology and the expansion of LFM applications. © 2021, Science Press. All right reserved.
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页码：35 / 41
页数：6
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