研发阶段涡扇发动机模型自适应方法

为了实现研发阶段涡扇发动机整机试验数据的快速评估和模型自适应,提出一种发动机模型自适应方法。该方法以整机试验数据为输入,结合气动热力过程约束方程和发动机整机匹配约束条件,重构出各部件的性能参数。文中提出了按照高压涡轮导向器喉部流通能力确定核心机流量的方法,并以载荷系数为媒介实现叶轮机械部件参数修正计算,完成了小涵道比涡扇发动机的自适应建模计算。计算结果表明,17个测量参数与计算结果完全一致,该方法完成单个状态点自适应计算的平均时间约为1.44ms,主要部件特性的修正系数在0.95~1.05。采用该方法计算的部件特性参数自适应修正系数可为发动机性能调试和故障诊断提供依据。

陆对海定向钻穿越技术在海洋工程的探索与实践

为解决崖城13-1管道高栏支线项目海底管道登陆段施工存在的诸多困难和风险,尝试采用陆对海定向钻穿越技术,通过定向钻穿越方案的优化设计、精确控制导向孔精度和海底管道回拖的高效实施,高质量完成海底管道登陆段施工作业。降低了对环境的影响,提高了工程施工效率,较原海底管道预挖沟回填方案节省工期和费用。国内海洋油气田开发海底管道定向钻穿越登陆的实践,为后续国内类似油气输送管道定向钻穿越的设计和施工提供了宝贵经验。

Quality Evaluation of Lake Water and Sediment Based on Multilevel Fuzzy Theory

[ Objective ] The study aimed to assess the pollution of water and sediment in Wuliangsuhai Lake based on multilevel fuzzy theory. [ Method] On the basis of measured and survey data, the quality of water and sediment in six representative sites of Wuliangsuhai Lake was evalu- ated by using multilevel fuzzy theory. [ Result] Water quality of Wuliangsuhai Lake was different in space, that is, the water quality closer to outfalls was poor, but the water quality became better from north to south with the direction of water flow. Sediment near the water exit was at Grade IV, while it was at GradeV in other sites. From the evaluation results of water and sediment, we could see that Wuliangsuhai Lake was suffering serious pollution, and eutrophication process was aggravating, so it is extremely urgent to control and restore Wuliangsuhai Lake. [Conclusion] The re- search could provide scientific references for controlling the pollution of Wuliangsuhai Lake.