DOE在航空发动机试验设计中的应用
Application of DOE in Test Design for Aero-engine
崔金辉 1杨乐 1闫雨嘉 1周玉昭1
作者信息
- 1. 中国航发沈阳发动机研究所,辽宁 沈阳 110015
- 折叠
摘要
航空发动机的性能受可调几何变量控制规律的影响十分明显,在工程试验中,通常采用不同的几何调整措施实现发动机性能优化.但随着可调几何变量数量的增加,性能寻优工作越来越难.为明确不同几何调整措施对发动机性能的影响,获取使发动机性能较优的可调几何变量控制规律组合调整方法,在尽可能少的试验次数下实现发动机性能优化,引入了一种高效、简便的试验设计DOE(Design of Experiment)法.采用DOE技术,以降低发动机排气温度为最终优化目标制定了试验计划,确定将风扇进口导向叶片角度(α1)、高压压气机可调静子叶片角度(α2)、喷管喉道面积(A8)作为可调几何变量,并在给定的调节范围内开展了试验,录取了不同几何调整措施对应的发动机性能参数.根据性能录取结果拟合了性能优化模型,采用DOE自带的响应优化器功能确定了 3 个可调几何变量组合调整方法,并对更低的排气温度进行了预测计算,得到了满意的可调几何变量控制规律组合调整策略,最终完成了试验的优化设计.分析结果表明,降低发动机排气温度,可采取增加A8 或者减小α2 的措施,但α1 和A8 之间存在明显的交互效应,台架上需参考A8 的大小确定α1 的调试方法;DOE预测功能通过对可调因子水平进行扩展,可以实现性能寻优;DOE能够高效地实现多可调变量下的试验优化设计,具有较好的使用前景.
Abstract
The performance of aero-engine is obviously affected by the control law of adjustable geometric variables.In engineering tests,different geometric adjustment measures are usually adopted to optimize the engine performance.However,with the increase of the number of adjustable geometric variables,the performance optimization is more and more difficult.In order to determine the influences of different geometric adjustment measures on engine performance,and obtain the combination adjustment method of adjustable geometric variable control law for optimizing engine performance with as few test times as possible,an efficient and simple method of DOE(Design of Experiment)is introduced.DOE technology is used in the paper to make a test plan to reduce the engine exhaust temperature as the final optimization goal.The fan inlet guide blade angle(α1),the variable stator vane angle of compressor(α2)and the nozzle throat area(A8)are determined as adjustable geometric variables.The tests are carried out within a given adjustment range,and the engine performance parameters corresponding to the different geometric adjustment measures are recorded.The performance optimization model is fitted according to the test results.Combination adjustment method of adjustable geometric variable is determined by using the response optimizer function of DOE.The lower exhaust temperature is predicted and satisfactory combination adjustment strategies are obtained.The optimization design of the experiment is finally completed.The analysis results show that the reduction of engine exhaust temperature can be achieved by increasing nozzle throat area or decreasing α2.There are obvious interaction effects between α1 and A8,and the debugging method of α1 should be determined by reference to nozzle throat area.DOE prediction function can realize performance optimization by extending the level of adjustable factor.Therefore,DOE can realize the optimal design of experiments efficiently under multiple adjustable variables,and has a good application prospect.
关键词
试验设计(DOE)/可调几何变量/性能优化/航空发动机Key words
DOE/adjustable geometric variable/performance optimization/aero-engine引用本文复制引用
出版年
2024
NETL
NSTL
万方数据