基于单杆操纵的双轴涡桨发动机稳态调节计划设计

Design of Steady State Control Schedule for Two-Spool Turboprop Engine Based on Single-Lever Control

关键词:  涡桨发动机  稳态调节计划  逆算法  单操纵杆控制  优化设计

Key words:  Turboprop engine  Steady state control schedule  Inverse algorithm  Single-lever control  Optimization design

摘要:

为实现涡桨发动机的单杆操纵，提出一组基于发动机稳态特性的功率规划具体寻优设计流程。提出巡航状态下的两种综合性能指标，以兼顾发动机耗油率与螺旋桨效率的优化需求。为解决优化设计过程中稳态特性图难以有效获取的问题，对稳态求解模型进行了逆算法改进。某型双轴涡桨发动机的仿真结果表明，逆算法的求解精度与正向算法一致，且与传统双杆恒转速调节计划相比，单杆功率规划变转速调节计划使发动机在巡航状态设计工况下的平均耗油率降低了1.38%，平均效率/耗油率综合性能指标提升了2.09%。

Abstract:

A specific optimization design process of power planning based on engine steady state characteristic was presented to realize the single-lever control of turboprop engine. Two comprehensive performance indexes under the cruise state were presented to give consideration to both optimization requirements of engine specific fuel consumption and propeller efficiency. In order to solve such problem that the steady state characteristic map is difficult to obtain in optimization design process， the steady state model was improved by employing an inverse algorithm. The results of simulation on a two-spool turboprop engine show that the accuracy of inverse algorithm is consistent with that of direct algorithm. Compared with conventional double-lever constant speed control schedule， the single-lever power planning variable speed control schedule has reduced engine’s average specific fuel consumption by 1.38% and has increased average efficiency/specific fuel consumption comprehensive performance index by 2.09% under designed cruise state.