航空发动机

The 3-dimension solid model of the 8th turbine rotor blade of some type aero engine is constructed in software UG, and the numerical calculation region of stream field in ECM is set up in special flow field calculation software FLUENT based on the principle of hydrodynamics. The distribution of 6-dimension forces is got after numerical calculation, and the equation between 6-dimision forces and interelectrode gap is set up.

基于流体力学原理，用UG造型出某型航空发动机8级涡轮转子叶片，用流场计算软件FLUENT构造电解加工中叶片的流场计算区域，经数值计算得到六维力的分布，并从理论上建立六维力与间隙之间的关系方程式，为后续试验研究提供了参考依据。

In this thesis, adaptive inverse control for aeroengine is studied.

本文对航空发动机自适应逆控制进行了较为全面的研究。

School of Jet Propulsion, Beijing University of Aeronautics and Astronautics

航空发动机气动热力科技重点实验室，北京 100191

The project activities include the use of FLUENT to optimize the scarf angle of the inlet face of an aero-engine nacelle, making the compromise between ground noise levels and aerodynamic performance.

该项目的活动包括使用流利的优化围巾角湾面临的航空发动机短舱，使地面之间的妥协噪音水平和空气动力学性能。

Coach and manage the team member, deploy the design and analysis of flow path, component dynamic, thermodynamic and thermal analysis etc.

通过指导和管理团队人员，组织开展商用航空发动机流道、部件气动与热力、热分析设计及分析。

Application of topology optimization in the structure design of aero-engine pylon is studied.

研究了拓扑优化技术及其在航空发动机吊挂结构设计中的应用。

The contact modal of turbine disk and blade rabbet is made aiming at the high reliability. The 3D heat-structure coupling modal is computed by ANSYS and the dangerous position is confirmed. The 15 scattering point of strain breadth is computed by APDL language of center-composition in probability design mold. The teacher signal is intervened referring to the points.

针对航空发动机涡轮盘榫接触部位在寿命期内高可靠性的要求，建立某涡轮盘榫接触模型，用ANSYS计算其热、结构耦合的三维弹塑性模型的应力应变并确定危险部位，然后用APDL语言在概率设计模块中采用中心组合法计算15个应变幅分布的离散点值，对这些点进行插值得到人工神经网络的目标函数。

The radius of curvature of blade tip is the most important factor that affects the quality of blade.

所以对航空发动机叶片前缘曲率半径质量的检测就尤为重要。

In real flight, multiple sensors of aircraft engine control system may fault at a time. In order to solve this problem, a revised multiple-failure-hypothesis based testing is investigated. This approach uses multiple Kalman filters, and each of Kalman filter is designed based on a specific hypothesis for detecting specific sensors fault, and then uses WSSR (Weighted Sum of Squared Residual) to deal with Kalman filter residuals, and residual signals are compared with threshold in order to make fault detection decisions. The simulation results show that the proposed method can be used to detect multiple sensors soft failures fast and accurately.

一般认为两个以上传感器同时发生故障的概率较小，但实际上不能排除其发生的可能性；提出了一种改进的多重故障假设方法来解决航空发动机控制系统多传感器同时发生软故障的问题，这一方法采用一组卡尔曼滤波器，每个滤波器对应一个被检测传感器的故障模态；采用残差加权二乘方处理滤波残差并与门限值作比较来判断是否发生故障；仿真结果表明，所提出的方法能有效解决多传感器软故障的检测与隔离问题。

Modeling of nonlinearity dynamic respondence of the aero engine was studied.

研究航空发动机的非线性动态模型的建立问题。

At the rear was an innovative combination transaxle with the gearbox, clutch, differential, and inboard-mounted drum brakes.

在后面是与变速箱，离合器，差的创新结合变速，和内侧安装鼓式制动器。

For more people can apprecaite and have the master work, there is reproduction painting appears in the market, the large various selection of paint,the high saturation of color plus the plentiful sfumato, to make the reproduction perfect copy and detail as original painting, so as to meet the requirment of amateurs who love art paintings,they do not need to pay high price to get classical paintings.

颜料色域广，色彩饱和度高，色彩层次丰富，图像色彩还原真实，能完美的复制原作，满足艺术爱好者欣赏，艺术爱好者们不用支付昂贵的价格就能拥有经典油画。