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涡轮级燃气入侵的理论分析及数值模拟 被引量:17
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作者 朱莉娅 罗翔 +1 位作者 徐国强 田淑青 《推进技术》 EI CAS CSCD 北大核心 2014年第11期1511-1516,共6页
为了分析航空发动机涡轮级中的燃气入侵现象,提出一种研究封严间隙处流动规律的理论方法,并采用全环模型进行了数值模拟。在该理论方法中,动盘旋转、封严冷气、外环主流对流动的影响用三个特征速度来表征;它们的相互作用用速度比来描述... 为了分析航空发动机涡轮级中的燃气入侵现象,提出一种研究封严间隙处流动规律的理论方法,并采用全环模型进行了数值模拟。在该理论方法中,动盘旋转、封严冷气、外环主流对流动的影响用三个特征速度来表征;它们的相互作用用速度比来描述。数值模拟结果表明:随着速度比的变化,封严间隙处呈现燃气沿静盘入侵、燃气基本不入侵以及燃气沿动盘入侵等三种流动形式。利用速度比的影响规律,可初步判断封严间隙处的燃气入侵情况以及最小封严冷气流量。 展开更多
关键词 航空发动机 涡轮级 燃气入侵 理论分析 全环模型
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Multidisciplinary design optimization on production scale of underground metal mine 被引量:4
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作者 左红艳 罗周全 +1 位作者 管佳林 王益伟 《Journal of Central South University》 SCIE EI CAS 2013年第5期1332-1340,共9页
In order to ensure overall optimization of the underground metal mine production scale, multidisciplinary design optimization model of production scale which covers the subsystem objective function of income of produc... In order to ensure overall optimization of the underground metal mine production scale, multidisciplinary design optimization model of production scale which covers the subsystem objective function of income of production, safety and environmental impact in the underground metal mine was established by using multidisciplinary design optimization method. The coupling effects from various disciplines were fully considered, and adaptive mutative scale chaos immunization optimization algorithm was adopted to solve multidisciplinary design optimization model of underground metal mine production scale. Practical results show that multidisciplinary design optimization on production scale of an underground lead and zinc mine reflect the actual operating conditions more realistically, the production scale is about 1.25 Mt/a (Lead and zinc metal content of 160 000 t/a), the economic life is approximately 14 a, corresponding coefficient of production profits can be increased to 15.13%, safety factor can be increased to 5.4% and environmental impact coefficient can be reduced by 9.52%. 展开更多
关键词 underground metal mines production scale multidisciplinary design optimization adaptive mutative scale chaosoptimization algorithm immunization
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