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航空工程学院 航空发动机综合课程设计
题 目 No Light Up During Start CFM56-5C发动机启动不点火 作者姓名 专业名称 热能与动力工程 指导教师
提交日期 答辩日期 CONTENTS
CHAPTER 1 GENERAL 1
1.1 Overview of the CFM56-5C Turbofan Engine 1
1.2 The Technology behind the CFM56-5C Turbofan Engine 2
1.3 The Subject of this Article 2
CHAPTER 2 FADEC CONTROL SYSTEM 4
2.1 FADEC System Introduction 4
2.1.1 FADEC Purpose 4
2.1.2 FADEC Component 4
2.2 Electronic Control Unit 4
2.2.1 ECU Distribution 4
2.2.2 ECU Power Supply 4
2.3 Hydro-mechanical Unit (HMU) 5
2.3.1 HMU Introduction 5
2.3.2 HMU Function 5
2.3.3 Schematic Diagram of HMU 6
2.4 Process of FADEC Control 7
2.4.1 Working Process 7
2.4.2 Function diagram of the FADEC 8
2.4.3 Abnormal work 8
CHAPTER 3 IGNITION SYSTEM 10
3.1 General Description 10
3.2 Ignition System Distribution 10
3.2.1 Electrical Power 10
3.2.2 Ignition Exciter 11
3.2.3 Ignition Leads 12
3.2.4 Spark Igniter 12
3.3 Ignition System Control 13
3.3.1 The process of Ignition 13
3.3.2 The Control Switch 14
3.4 Principle Diagram of the Ignition 15
3.4.1 Working Process 15
3.4.2 Function diagram of the Ignition system 15
3.4.3 Abnormal work 16
3.4 Fuel Nozzle 16
CHAPTER 4 FAULT ANALYSIS 18
4.1 Fault Analysis 18
4.1.1 Fault description 18
4.1.2 Analysis of failure causes 18
4.1.3 Fault Tree 18
4.2 Process of Trouble Shooting 19
Reference 21
Appendix 22
Abbreviations
EGT: exhaust gas temperature
ECU: Electronic Control Unit
HMU: Hydro-mechanical Unit
FADEC: Full Authority Digital Engine Control
PMC: Power Management Control
ACC: Active Clearance Control
ADIRU: Air Data/Inertial Reference Unit
EIVMU: Engine Interface and Vibration Monitoring Unit
VSV: Variable Stator Vane
VBV: Variable Bleed Valve
HPT: High Pressure Turbine
LPT: Low Pressure Turbine
LPTCC: Low Pressure Turbine Case Cooling
HPTCC: High Pressure Turbine Case Cooling
RACSB: Rotor Active Clearance Start Bleed
CHAPTER 1 GENERAL
1.1 Overview of the CFM56-5C Turbofan Engine
The CFM56-5C, the most powerful engine in the
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