| XING Yao-dong， ZHU Zhen-ye， XUE Cheng-cheng， YANG Fan.Application of Variable Area Fuel Nozzle for Aeroengine Digital Control System Semi-Physical Test[J].航空发动机,2024,50(6):120-124 |
| Application of Variable Area Fuel Nozzle for Aeroengine Digital Control System Semi-Physical Test |
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| Key Words:variable area fuel nozzle semi-physical test digital control system back-pressure simulation aeroengine |
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| Abstract:To improve the confidence level of semi-physical tests for aeroengine digital control systems, the combustor back-pressure
simulation study was conducted during the test process. Based on the fuel flow rate and pressure differential characteristics of the nozzle of
an aeroengine combustor, a test scheme based on variable area fuel nozzle was proposed. The nozzle adopts a mechanical valve structure
and is designed with a shaped hole to ensure that the pressure difference and fuel flow rate passing through the nozzle meet the test require?
ments. Two variable area nozzles were manufactured and tested on a semi-physical test bench. The test results show that the main working
pressure data of the digital control system in the semi-physical test is consistent with actual engine test results, thus invalidating the vari?
able area fuel nozzle is a practical method for combustor back-pressure simulation. Compared with the traditional back-pressure simula?
tion scheme, the variable area fuel nozzle has a simpler structure and does not need a complex combustor back-pressure control system.
This test scheme are applicable to control system semi-physical tests for different engine models. |
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