Installed Performance of Adaptive Cycle Engine Ejector Nozzle Based on Multi-Fidelity Simulation

被引：0
作者：
Xu Z.-W. [1 ]
Tang H.-L. [2 ]
Chen M. [1 ]
Zhang J.-Y. [2 ]
机构：
[1] School of Energy and Power Engineering, Beihang University, Beijing
[2] Research Institute of Aero-Engine, Beihang University, Beijing
来源：
Tuijin Jishu/Journal of Propulsion Technology | 2023年 / 44卷 / 09期
关键词：
Adaptive cycle engine; Afterbody drag; Computational fluid dynamics; Ejector nozzle; Multi-fidelity simulation; Variable-fidelity surrogate model;
D O I：
10.13675/j.cnki.tjjs.2207083
中图分类号：
学科分类号：
摘要：
The unique three-bypasses configuration of the Adaptive Cycle Engine（ACE）makes the ejector nozzle a viable exhaust system option. To accurately evaluate the installed performance of the ejector nozzle matching with ACE under various operating conditions，an ACE-ejector nozzle multi-fidelity simulation method was proposed based on the variable-fidelity surrogate model. A variable-fidelity surrogate model of ejector nozzle was established through the combination of ejector nozzle low-fidelity and high-fidelity computational fluid dynamics（CFD）model. By dynamically optimizing and updating the variable-fidelity surrogate model，high-fidelity CFD simulations are carried out in the matching region of the ejector nozzle performance space，and the performance evaluation of the ejector nozzle in the matching state is efficiently achieved. Simulation results show that the installed thrust coefficients of the ACE ejector nozzle are 0.979 and 0.961 respectively at subsonic and supersonic cruise. The afterbody drag coefficient reaches a maximum of 0.25 in the transonic speed region at dry acceleration condition. The primary nozzle discharge coefficient is the lowest at subsonic cruise，which is 0.896. Through the method，only 180 low-fidelity CFD simulations and 173 high-fidelity CFD simulations are required to complete the ejector nozzle installed performance evaluation of 33 ACE operating points. © 2023 Journal of Propulsion Technology. All rights reserved.
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