Aero-engine certification method and safety margin of “drop-in” fuel
-
摘要: 在航空替代燃料缺乏足够飞行数据,几乎不可能通过有限发动机和飞行实验来评价其安全特性状况下,研究开发了一种简便却可保证适航安全性的方法来研究航空替代燃料的安全性能.“即用性”航空替代燃料被认为是发动机更换最频繁的部件,从而采用相似类比、使用经验方法来验证“即用性”燃料的适航符合性.以航空煤油实际使用经验为基准,提炼燃料性能、燃料系统、燃烧性能、发动机性能、飞机性能5个层次上参数化描述的安全边界,与通过航空替代燃料在5个层次上得到的工作边界进行相似类比,从而预测发动机使用替代燃料的安全性.该方法提炼了替代燃料在发动机安全性上的判定准则,还降低了认证流程的燃料成本和时间成本.
-
关键词:
- “即用性” 燃料 /
- 航空发动机模型 /
- 不依赖燃料的安全标准 /
- 相似类比 /
- 安全准则
Abstract: A convenient method ensured the safety of airworthiness was developed to research the safety performance of aviation alternative fuel in case of lacking enough flight data of aviation alternative fuel,and it is almost impossible to evaluate the safety performance by limited engines and flight experiments. On the base of the fuel as one of the engine replacement parts, the safety of alternative fuels can be complied with compliance verification method, including to extract a fuel-independent safety criterion from the history experience and to compare the aero-engine safety of alternative fuels by similar analogy. The critical parameters with the characteristic parametric numerical description have been extracted on five levels: fuel specification level, fuel system level, component level, engine level and aircraft level. The work margin of critical parameters obtained from alternative fuel are analogized with the safety margin of critical parameters based on kerosene flight experience, and accordingly the results can be analyzed and identified the safety of aero-engine in alternative fuel. This certification process help to achieve on the safety of alternative fuel and the cost on the refining fuel required as same as kerosene. Accordingly, the safety margin can bridge the gap from kerosene flight experiences to aviation alternative fuel safety certification. The optimization methodologies for the production and distribution of alternative fuel will be established based on the safety sensitivity analysis of aero-engine and a fuel-independent safety standard. -
[1] WANG Haiying,CHEN Zhingming,YANG Xiaoyi.Life cycle analysis of alga alternative aviation bio-fuel[R].Beijing:The Third China Energy Scientist Forum,2011. [2] CHENZhingming,YANG Xiaoyi,PENG Zhijun.The development of alternative jet fuel for aviation[R].Beijing:The Second China Energy Scientist Forum,2010. [3] Kumar K,Sung C J,Hui X.Laminar flame speeds and extinction limits of conventional and alternative fuels[J].Fuel,2010,90(3):1004-1011. [4] Garby R,Selle L,Poinsot T.Large-eddy simulation of combustion instabilities in a variable-length combustor[J].Comptes Rendus Mécanique 2013,341(1/2):220-229. [5] Smith C E,Nickolaus D,Leach T,et al.LES blowout analysis of premixed flow past V-gutter flameholder[J].AIAA-2007-170,2007. [6] Xin Y,Sung C J,Law C K.A mechanistic evaluation of Soret diffusion in heptane/air flames[J].Combust Flame 2012,159(9):2345-2351. [7] DING Shuiting,LI Guo,LUO Bin.Active control thermal-loading method to ameliorate stress in aeroengine turbine disk[J].Journal of Thermophysics and Heat Transfer,2013,27(2):274-285. [8] DING Shuiting,LI Guo,DENG Mingchun.Experimental study of an actively managed thermal loading method in turbine disk[J].Journal of Thermophysics and Heat Transfer,2014,28(1):39-49. [9] ZHANG Gong,DING Shuiting.Safety analysis of flow parameters in a rotor-stator cavity[J].Chinese Journal of Aeronautics,2012,25(6):831-838. [10] DING Shuiting,QIU Tian,LIU Xiaofeng,et al.Dynamic coupled systems FHA:a simulation-aided approach[J].Procedia Engineering,2014,80:479-493. [11] DING Shuiting,QIU Tian,LIU Xiaofeng,et al.FHA method for VBV position control function of FADEC system based on aero-engine dynamic model[J].Procedia Engineering,2011,17:567-579. [12] DING Shuiting,LI Guo.Experimental study of flow through a blade trailing edge with a wavy partition[J].Experimental Heat Transfer,2011,24(3):266-284. [13] DING Shuiting,BAO Mengyao.Causality diagram based safety analysis of micro turbojet engine[J].Transactions of Nanjing University of Aeronautics and Astronautics,2011,28(30):262-268. [14] 丁水汀,张弓,蔚夺魁,等.航空发动机适航概率风险评估方法研究综述[J].航空动力学报,2011,26(7):1441-1451. DING Shuiting,ZHANG Gong,YU Duokui,et al.Airworthiness probability risk assessment study on aviation engine[J].Journal of Aerospace Power,2011,26(7):1441-1451.(in Chinese) [15] 丁水汀,鲍梦瑶,杜发荣.航空活塞发动机涡轮增压系统的安全边界研究[J].航空动力学报,2011,26(11):2534-2542. DING Shuiting,BAO Mengyao,Du Farong.Aviation piston engine turbo system security boundary[J].Journal of Aerospace Power,2011,26(11):2534-2542.(in Chinese)
点击查看大图
计量
- 文章访问数: 1102
- HTML浏览量: 4
- PDF量: 502
- 被引次数: 0