Position and function of numerical simulation technology in aero-engine development
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摘要:
针对先进航空发动机的技术发展需求,提出了航空发动机数值仿真技术的定义和内涵。从专业、学科、空间、时间、工具等方面给出了航空发动机数值仿真技术的五个维度,从促进航空发动机研制模式转变等方面分析了其战略地位和作用。通过国外典型研究计划和实例分析了国内外发展现状,指出了我国在该技术领域的主要差距。提出要充分认识数值仿真技术在航空发动机研制中的重要地位和作用,尽快建设和发展属于我国自己的航空发动机数值仿真系统,建设面向全行业的“航空发动机数据库”。
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关键词:
- 航空发动机 /
- 数值仿真技术维度 /
- 技术发展需求 /
- 发动机仿真系统 /
- 航空发动机数值仿真研究中心
Abstract:The definition and implication of numerical simulation technology were proposed based on the technical development requirements of advanced aero-engines development.The dimensions of aero-engine numerical simulation technology were studied from specialty,discipline,space,time and tools,while the strategic position and function in promoting the transformation of aero-engine development method were analyzed.The disparity of numerical technology for aero-engine at home and abroad was discussed by analyzing the development status of typical foreign research plans and projects.It is proposed to fully understand the important position and function of numerical simulation technology in the aero-engine development,and to build and develop our own aero-engine numerical system and industry-wide “aero-engine database” as soon as possible.
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表 1 采用先进设计仿真工具技术可减少的试验小时数
Table 1. Reduced experimental hours with advanced simulation technology
测试项目 试验时间/h 传统方式 先进仿真设计 气动/机械 775 400 功能/环境 675 500 主动控制/耐久性 775 400 地面操控性 750 450 空中操控性 2595 1325 热端部件/寿命 3000 2000 总试验小时数 11020 7550 表 2 采用先进设计仿真工具技术可减少的研制经费
Table 2. Reduced development costs with advanced simulation technology
研发过程 (研制经费/百万美元)/% 传统方式 先进仿真
设计概要设计 46(3) 37(7) 详细设计 198(13) 160(22) 工装/制造/
装配部件 30(2) 22(3) 核心机/发动机样机 481(32) 164(22) 飞行试验用发动机 300(21) 156(21) 试验 部件 16(1) 16(2) 核心机/发动机 202(14) 126(17) 项目管理/其他 213(14) 52(8) 总研制经费 1496 733 注:括号内为该阶段经费占总经费的比例。 表 3 仿真需要的精度和目前达到的水平
Table 3. Accuracy required for simulation and the currently level
参数 目前的精度/% 需要的精度/% 整机性能 ±2.0 ±0.5 操控性 ±20.0 ±2.0 气动热力学 ±3.0 ±1.0 三维结构 ±5.0 ±2.0 高周疲劳/断裂力学 ±20.0 ±10.0 集成控制规律的性能 ±2.0 ±0.5 寿命 低周疲劳 ±25.0 ±5.0 高周疲劳 ±100.0 ±20.0 抗氧化 ±10.0 ±5.0 应力断裂 ±10.0 ±5.0 材料属性 ±10.0 ±5.0 表 4 目前CANSS系统达到的水平
Table 4. Current level of CANSS system
参数 目前的
精度/%需要的
精度/%CANSS实现的
精度/%整机性能 ±2.0 ±0.5 2.80 气动热力学性能 ±3.0 ±1.0 6.00 集成控制
规律的性能±2.0 ±0.5 3.08 -
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