A versatile volume-based modeling technique of distributed local quadratic convergence for aeroengines  

作　　者：Yudong Liu Min Chen Hailong Tang 

机构地区：[1]School of Energy and Power Engineering,Beihang University,Beijing 100191,China [2]Research Institute of Aero-Engine,Beihang University,Beijing 100191,China

出　　处：《Propulsion and Power Research》2024年第1期46-63,共18页推进与动力（英文）

基　　金：funded by the National Science and Technology Major Project (2017-I-0001-0001,and 2017-I-0005-0006).

摘　　要：For advanced aero-engine design and research,modeling and simulation in a digital environment is indispensable,especially for engines of complicated configurations,such as var-iable cycle engines(VCE)and adaptive cycle engines(ACE).Also,in the research of future smart engines,reliable real-time digital twins are paramount.However,the 2 dominant methods that used in solving the simulation models,Newton-Raphson(N-R)method and volume-based method,are not fully qualified for the study requirements,because neither of them reaches the satisfactory balance of convergence rate and calculating efficiency.In this study,by deeply analyzing the mathematical principle of these 2 methods,a novel modeling and solving method for aero-engine simulation,which integrates the advantages of both N-R and volume-based methods,is established.It has distributed architecture and local quadratic convergence rate.And a novel modeling method for variable area bypass injectors(VABI)is put forward.These facilitate simulation of various configurations of aero-engines.The modeling cases,including a high bypass-ratio(BPR)turbofan and an ACE,illustrate that the novel technique decreases the iterations by about two-thirds comparing with volume-based method,while the success rate of convergence remains over 99%.This proves its superiority in both convergence and calculating efficiency over the conventional ones.This technique can be used in advanced gas turbine en-gine design and control strategy optimization,and study of digital twins.

关 键 词：Aero-engine performance simulation Variable cycle engine Variable area bypass injector Digital twin Newton-Raphson method 

分 类 号：V23[航空宇航科学与技术—航空宇航推进理论与工程]