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| 1 | Detailed modeling of aluminum particle combustion——From single particles to cloud combustion in Bunsen flames显示文摘A numerical model for aluminum cloud combustion which includes the effects of interphase heat transfer,phase change,heterogeneous surface reactions,homogeneous combustion,oxide cap growth and radiation within the Euler–Lagrange framework is proposed.The model is validated in single particle configurations with varying particle diameters.The combustion process of a single aluminum particle is analyzed in detail and the particle consumption rates as well as the heat release rates due to the various physical/chemical sub-models are presented.The combustion time of single aluminum particles predicted by the model are in very good agreement with empirical correlations for particles with diameters larger than 10μm.The prediction error for smaller particles is noticeably reduced when using a heat transfer model that is capable of capturing the transition regime between continuum mechanics and molecular dynamics.The predictive capabilities of the proposed model framework are further evaluated by simulating the aluminum/air Bunsen flames of Mc Gill University for the first time.Results show that the predicted temperature distribution of the flame is consistent with the experimental data and the double-front structure of the Bunsen flame is reproduced well.The burning rates of aluminum in both single particle and particle cloud configurations are calculated and compared with empirical correlations.Results show that the burning rates obtained from the present model are more reasonable,while the correlations,when embedded in the Euler–Lagrange context,tend to underestimate the burning rate in the combustion stage,particularly for the considered fuel-rich flames. | Jiarui ZHANG Oliver T.STEIN Tien D.LUU Ali SHAMOONI Zhixun XIA Zhenbing LUO Likun MA Yunchao FENG Andreas KRONENBURG | 2022 | Chinese Journal of Aeronautics2022，35，5： | 2 |
| 2 | 汽车配套供应工业中的经营过程优化──面向顾客的备件供应业显示文摘经营过程始终面向顾客利益是市场中企业经营行为的最重要的任务。因此,通常作为先锋的汽车工业及其供应商开发了各种可以转让给其他行业的方法。对汽车供应商而言,变化了的环境条件是促使他们在为顾客服务的过程中实施整个经营过程优化的原因。从备件的确认、购置、储存直到发送和车辆维修,在整个关系中通过采用彼此协调的措施,使供应成本显著降低。对机械设备制造而言,这些措施具有同样重要的意义,它们可以在资本货物的寿命不断延长的情况下,满足保障备件供应的需要。 | J.Becker T.Stein 胡振东 | 1997 | 工业工程与管理1997，2，5： | 1 |
| 3 | 高效液相色谱泵出口单向阀功能的新性能测试显示文摘高效液相色谱(HPLC)中泵的单向阀要承受反复的机械强度压力,故容易发生故障。由于外部漏液会导致泵压明显下降,所以这种情况很容易诊断,然而遗憾的是,泵内部连接的漏液却是比较复杂的,因为此时不会有一个明显的压力下降,所以HPLC软件程序中的诊断算法也无法识别。本文讨论了一个测试发现单向阀隐藏故障并清除故障的方法。 | Eduard ROGATSKY Matthew GALLITTO Daniel T.STEIN | 2011 | 生命科学仪器2011，9，1： | 0 |
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