航空活塞发动机点火强度均衡性测试及防火研究

发布时间：2018-05-18 10:13

本文选题：航空活塞发动机 + 点火强度　；参考：《火灾科学》2016年04期

【摘要】：针对磁电机故障和点火电嘴故障会使发动机失去动力引起飞行事故,高压导线破损放电可能导致动力系统起火并引发飞机火灾等安全隐患,利用紫外探测技术和虚拟仪器技术设计了航空活塞发动机点火强度均衡性测试系统,利用该测试系统完成航空活塞发动机点火系统的安全隐患检测。以四缸活塞发动机正常点火、高压导线破损、点火电嘴积碳等三种点火系统作为测试对象,测试发动机在不同转速下各气缸点火电火花紫外辐射强度,用以表征点火能量强度。实测得到,在不同转速下点火电嘴积碳故障都会导致点火强度降低;高压导线破损漏电会同时导致点火能量损失与点火强度不均衡,并且与转速呈正相关。测试结果可为航空活塞发动机点火系统故障排除及发现可能存在的高压导线破损放电电气火灾隐患点提供技术依据。
[Abstract]:In view of the failure of magneto motor and ignition nozzle, the failure of engine losing power will cause flight accident, and the breakage and discharge of high voltage wire may cause fire in power system and lead to the safety hidden trouble such as airplane fire, etc. Using ultraviolet detection technology and virtual instrument technology, the test system of ignition intensity equalization of aeropiston engine is designed, and the safety hidden trouble detection of ignition system of aeropiston engine is completed by using the system. Three kinds of ignition systems, such as normal ignition, high pressure wire breakage and charring of ignition nozzle, are used as test objects to test the ultraviolet radiation intensity of ignition spark of engine at different rotating speeds, which can be used to characterize the intensity of ignition energy. The measured results show that the ignition intensity will be decreased under the different rotating speed, and the loss of ignition energy and the igniting intensity will be unbalanced at the same time, which is positively related to the rotational speed. The test results can provide the technical basis for troubleshooting the ignition system of aero-piston engine and finding out the potential electrical fire hidden point of high pressure wire breakage and discharge.
【作者单位】：中国民用航空飞行学院;
【基金】：国家自然科学基金项目(No.51176179和51036007)
【分类号】：V234

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