| 马会宁，李春光，崔利丰，廉征环.某型航空发动机应急放油系统研究[J].航空发动机,2013,39(1):6-11 |
| 某型航空发动机应急放油系统研究 |
| Research of Emegency Fuel Dump System for an Aeroengine |
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| DOI： |
| 中文关键词: 应急放油系统 停车 故障机理 采样频率 节流嘴 航空发动机 |
| 英文关键词:fuel dump system engine breakdown failure mechanism sampling frequency throttle nozzle aeroengine |
| 基金项目: |
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| 中文摘要: |
| 针对某型航空发动机在地面应急放油时发生的停车故障，对该型发动机应急放油系统进行了深入的理论分析，并采用5 kHz的采样频率采集数据，进行大量的发动机台架试车和装机试车，通过微观分析，找出该型发动机停车故障的1种特殊原因。在精确分析的基础上，对应急放油系统采取改进设计，并通过试验进行了设计改进后的试车和试飞验证，在应急放油附件管接头通往加力泵接通活门管接头的内部增加Φ＝1.0 mm的节流嘴，使应急放油接通时主燃油喷嘴前、后压差最低值提高200～700 kPa，并且增加节流嘴后对发动机其他功能和性能无影响，从而可靠地解决了原有应急放油系统的缺陷，有效排除了某型航空发动机在地面应急放油时发生的停车故障 |
| 英文摘要: |
| Aiming at the breakdown failure of an engine fuel dumping, the system was theoretically analyzed, and a large number of engine tests and flights were performed by the sampling frequency data of 5 kHz, then a special reason of engine breakdown failure was presented by the microcosmic analysis. The improvment design was adpoted for the fuel dump system based on the exact analysis, and the verification of improved test and flight was passed. The throttle nozzle of Φ＝1.0 mm is used from the fuel dump accessory pipe joint to the pump valve pipe joint. The minimum of main fuel nozzle in-off pressure difference increases 200～700 kPa on the fuel dump system, and the throttle nozzle has no effect on other performances of the engine. The methods have reliably solved the limitation of original fuel dump system and effectively eliminated an engine breakdown failure on the ground fuel dump system. |
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