【摘 要】
：
For the optimization of turbine equipment,artificial regulation relying on the experience and global optimization are difficult to ensure the optimization efficiency.Thus,local optimization,mainly inc
【机 构】
：
Beijing Institute of Technology,Beijing,China,100081
论文部分内容阅读
For the optimization of turbine equipment,artificial regulation relying on the experience and global optimization are difficult to ensure the optimization efficiency.Thus,local optimization,mainly including the Adjoint method,becomes the mainstream of optimization.The Adjoint method used for steady flow in both external and internal field and unsteady flow in external field has got wide attention and researches.However,in internal field,the research on strictly time-accurate Adjoint optimization is rare.In this paper,the time-accurate Adjoint method for quasi-one-dimensional Euler equations is detailed derived and the discretization format is given specifically.Besides,the time-accurate Adjoint method is carried out in a duct.The gradient distribution compared with the Complex-Variable method shows correctness of the Adjoint equation and numerical discretization,which offers a platform for 3D turbomachinery time-accurate Adjoint optimization research.
其他文献
为了精确剔除GNSS（global navigation satellite system）坐标时间序列中的噪声，本文提出一种联合遗传算法（genetic algorithm， GA）和变分模态分解（variational mode decomposition， VMD）的降噪方法GA-VMD。该方法首先利用GA优化VMD参数，然后引入多尺度排列熵（multiscale permutation e
识别推力轴承轴向刚度对研究转子振动及轴承故障具有重要意义.首先建立推力轴承的力学模型,推导了推力轴承轴向刚度参数识别算法,并给出了相应的测量方法.然后,在半仿真离心压缩机试验台上,设计安装了具有轴向载荷加载功能的推力轴承试验装置,可利用电动液压泵和溢流阀实现静态和动态轴向载荷加载,分别采用传统载荷增量法和直接液压激励法的试验方法识别推力轴承的轴向刚度.最后,将试验结果与轴向刚度仿真值进行对比,发现
In turbomachinery design,rotor dynamics analysis is the most important part of the overall design process.Through the rotor dynamics analysis,the critical speed of the rotor can be analyzed,which can
This paper conducts a comprehensive study between single-camera Light Field Particle Image Velocimetry(LF-PIV)and multi-camera Tomographic Particle Image Velocimetry(Tomo-PIV).The dense ray tracing ba
High-speed high-pressure(HSHP)ratio compressor surge is a transient breakdown in compression accompanied by an abrupt momentary reversal of gas flow.It commonly exists in dynamic type turbo compressor
Since various foreign bodies can cause clogging and wear in the single-channel pump,considerable attentions have been focused on the numerical study of liquid-solid flows in the singlechannel pump.How
Blade tip profile based on NACA airfoil is firstly introduced into the radial expander to suppress the tip leakage loss.A blade with optimal NACA tip profile is obtained by coupling orthogonal experim
总结了水泵转子轴系转子动力学计算分析方法,给出了考虑密封影响的水泵轴系转子动力学计算分析方法.以某高压水泵轴系为例,利用转子动力学专业计算分析软件Madyn2000,对轴系各种支承状态进行了临界转速计算分析,与实际测试结果对比.同时也进行了考虑密封的频率响应分析,分析了密封对频率响应的影响.
The flow field in a compressor cascade is very complex due to the highly three-dimensional,turbulent and viscous effects.However,in the through-flow analysis method,viscosity effects are taken into ac
With the development of the pumped storage power station,the efficiency of the pump turbine has become a research topic in the field of the hydraulic power generation.A numerical simulation study of t