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g GE Aircraft Engines __________________________ Marine & Industrial Control Dynamics LM2500 AND LM6000 DRY LOW EMISSIONS CONTROL OVERVIEW TECHNICAL DATA GENERAL LICENSE TSU/OTS APPLICABLE The information ( including technical data) contained in this document is the property of GE. It is disclosed in con
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  g  GE Aircraft Engines   __________________________   Marine & Industrial Control Dynamics LM2500 AND LM6000DRY LOW EMISSIONSCONTROL OVERVIEW Prepared by : Peter Harrison27th March, 1997 ‘Even-b800d\Data\Users’[S:]’\General\Common\Dle_fld\dleovr.doc TECHNICAL DATA GENERAL LICENSE TSU/OTS APPLICABLE The information ( including technical data) contained in this document is the property of GE. Itis disclosed in confidence and the technical data therein is exported under a U.S. governmentlicense. Therefore, none of the information may be disclosed to other than the recipient, or used for purposes other than to render services to GE, without the express prior writtenauthorization of GE. In addition, the technical data therein, and the direct product of the data,may not be diverted, transfered, re-exported or disclosed in any manner not provided for by thelicense without the prior written approval of the U.S. government.  GE Proprietary Information - Technical Export License TSU/OTSMarch 27th, 19972 Dry Low Emissions Control OverviewTable of Contents 1. OVERVIEW 6 1.1. Dry Low Emissions Combustor 61.2. Dry Low Emissions Control Components 101.3. Fuel System 12 1.3.1. Four Valve System 121.3.2. Three Valve System 13 1.4. Bleed System 141.5. Fuel Control 151.6. Flame Temperature Control 15 1.6.1. Bulk Flame Temperature 151.6.2. A and C Ring Flame Temperature 17 2. FLAME TEMPERATURE ALGORITHM 193. FUEL PROPERTIES 25 3.1. Effect of fuel properties 253.2. Ring fuel nozzle scalars 273.3. Calorimeter and Chromatograph Operation 27 4. STARTING 28 4.1. Start Sequence 284.2. Control Operation 29 5. OPERATION AT IDLE 366. OPERATION WITHIN A COMBUSTOR CONFIGURATION WINDOW 387. FUEL METERING 40  GE Proprietary Information - Technical Export License TSU/OTSMarch 27th, 19973 8. COMBUSTOR STAGING 43 8.1. General 438.2. Starting 448.3. LM6000 Core Idle-Sync-Idle 448.4. Idle and Above Operation 448.5. LM6000 BC to AB zone avoidance 468.6. LM6000 BRNUL upper limit 468.7. ABC to AB stage down - LM2500 468.8. ABC to AB stage down - LM6000 478.9. Load drop/ overspeed 48 9. ACOUSTICS AND BLOWOUT AVOIDANCE (ABAL) LOGIC 48  GE Proprietary Information - Technical Export License TSU/OTSMarch 27th, 19974 TABLE OF FIGURES FIGURE 1.1 DLE COMBUSTOR   6 FIGURE 1.2 26-VALVE FUEL MANIFOLD  7 FIGURE 1.3 STAGING VALVE LAYOUT   7 FIGURE 1.4 COMBUSTOR CONFIGURATIONS  8 FIGURE 1.5 DLE ENGINE WITH COMBUSTOR STAGING VERSUS NON-DLE ENGINE   8FIGURE 1.6 DLE ENGINE WITH COMBUSTOR STAGING AND BLEED MODULATION 9 FIGURE 1.7 DLE BLEED VALVE   11 FIGURE 1.8 FOUR VALVE FUEL SYSTEM   12 FIGURE 1.9 THREE VALVE FUEL SYSTEM   13 FIGURE 1.10 EFFECT OF COMBUSTOR CONFIGURATION AND COMPRESSOR BLEED  14 FIGURE 1.11 BULK FLAME TEMPERATURE WINDOW   16 FIGURE 1.12 SPECIFICATION LM6000 RING AND BULK FLAME TEMPERATURE SCHEDULES  17 FIGURE 2.1 LM2500 DLE FLAME TEMPERATURE ALGORITHM   19 FIGURE 2.2 FLAME TEMPERATURE ALGORITHM/AIRFLOW CONTROL INTERFACE   21 FIGURE 2.3 LM2500 FLAME TEMPERATURE SENSITIVITY   22 FIGURE 2.4 LM2500 FLAME TEMPERATURE SENSITIVITY DUE TO PS3 VARIATION   23 FIGURE 2.5 LM2500 FLAME TEMPERATURE SENSITIVITY DUE TO WFAGMV VARIATION   23 FIGURE 2.6 LM2500 FLAME TEMPERATURE SENSITIVITY DUE TO LHV   23 FIGURE 2.7 LM2500 FLAME TEMPERATURE SENSITIVITY DUE TO SG  24 FIGURE 4.1A TYPICAL LM2500 DLE START CHARACTERISTICS  32 FIGURE 4.2A TYPICAL LM6000 DLE START CHARACTERISTICS  34 FIGURE 6.1 LM2500 BLEED SEQUENCE   39 FIGURE 6.2 LM6000 BLEED SEQUENCE   40 FIGURE 6.3 LM6000 VBV BLEED MODULATION   40 FIGURE 7.1 RING FUEL FLOW DEMANDS  41 FIGURE 8.1 COMBUSTOR STAGING DURING LOAD ACCELS  45 FIGURE 8.2 COMBUSTOR STAGING DURING LOAD DECELS  45 FIGURE 9.1 ACOUSTICS/BLOWOUT AVOIDANCE LOGIC   49 FIGURE 9.2 BLOWOUT DETECTION ALGORITHM WF/PS3 ERROR CALCULATION   50 FIGURE 9.3 BLOWOUT DETECTION   51
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