冯子轩1 ,毛建兴 2,3,4 ,胡殿印 2,3,4.变循环调节机构发展现状及关键技术[J].航空发动机,2023,49(1):18-26
变循环调节机构发展现状及关键技术
Review on the Development of Adjusting Mechanism in Variable Cycle Engine and Key Technologies
  
DOI:
中文关键词:  变循环发动机  调节机构  流固耦合  动力学仿真  机构可行性验证  关键技术
英文关键词:variable cycle engine  adjusting mechanism  fluid-structure interaction  dynamic simulation  feasibility validation  key technologies
基金项目:工信部基础科学中心重大项目(P2022-A-III-001-001)资助
作者单位E-mail
冯子轩1 ,毛建兴 2,3,4 ,胡殿印 2,3,4 1. 中国航空发动机集团有限公司北京 1000972. 北京航空航天大学 航空发动机研究院 3. 航空发动机结构强度北京市重点实验室4. 中小型航空发动机联合研究中心:北京 100191 fzx031@163.com 
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中文摘要:
      变循环发动机可通过改变热力循环特性,实现更宽的工作范围和满足更多的战斗任务需求;调节机构是实现模式切换 的执行机构,其设计技术发展伴随发动机整个研制历程。以变循环发动机跨代发展为主线,聚焦调节机构目标功能及结构方案演 变,系统梳理了调节机构的发展历程、功能分类及设计要求。调节机构构型设计以低泄漏量、高调节精度、快速响应和可靠安装为 总体要求,需进一步考虑未来发动机高热力负荷与紧凑布局引入的挑战与约束;在仿真分析方面,流固耦合分析应侧重解决几何 特征复杂、结构柔性、空间跨度大、瞬态特征显著导致的网格畸变、收敛性降低问题,动力学仿真分析需重点聚焦关键件柔性变形、 装配间隙、尺寸公差、传动摩擦等因素对机构卡滞、调节精度的影响;在试验验证方面,需进一步突破瞬态调节过程中温度、机械负 载试验室模拟技术,加强试验室模拟验证能力,实现调节机构故障定位、误差归因。该研究对变循环调节机构设计、研制及相关理 论、方法、技术发展具有一定指导意义。
英文摘要:
      The variable cycle engine provides wider working ranges and meets more requirements of combat missions by changing the modes of the thermal cycle. The adjusting mechanism is the actuator for mode selection,of which the design evolves with the development of the engine. This review is concentrated on the evolution of variable cycle engines,focusing on the evolution of target function and struc? tural schemes of adjusting mechanisms. The development history,functional classification and design requirements of adjusting mecha? nisms are systematically reviewed. In terms of structure design,the overall requirements can be summarized as low leakage rate,high con? trolling precision,fast response and reliable installation. Further consideration should be given to the challenges and constraints intro? duced by high thermal and mechanical load,and compact layout of advanced aeroengines. In terms of simulation analysis,the main con? cern of fluid-structure interaction analysis lies on the avoidance of grid distortion and the maintenance of computational convergence. Ef? forts should be spent on the evaluation of the influence of complex geometric features,structural flexibility,large spatial dimension and significant transient features. Dynamics simulation methods should be developed to quantify the impact of key components' flexibility-in? duced deformation,assembly clearance,dimensional tolerance,and transmission friction on mechanism jamming and adjustment accura? cy. Furthermore,breakthroughs in the reproduction of thermal and mechanical load during transient adjustment processes,are required to realize the fault location and error attribution of the adjustment mechanism. The research is referable for the design of the adjusting mecha? nism for variable cycle engines,specifically on the related theories,methods and experimental techniques.
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