The tide of reform and opening up promotes the rapid development of science and technology in our society, and citizens have not only wimessed great improvement in basic material living conditions, but also have lived...The tide of reform and opening up promotes the rapid development of science and technology in our society, and citizens have not only wimessed great improvement in basic material living conditions, but also have lived a fulfilled spiritual life. Material wealth stimulates self- awareness of rights protection of the citizens, and that＇s the issue of civil rights that we need to carry out in-depth studies on. As important rights of citizens, how can civil rights gain effective legal protection and how citizens themselves fully and effectively exercise the rights are problems asking for attention in the study of civil rights. Civil rights are not only the issue of inherence and existence, and we should also pay attention to its development or whether there is sustainable development. Moreover, how long this sustainability could last is also the issue of sustainable civil rights this thesis is going to discuss.展开更多
Multidisciplinary design optimization （MDO） is widely employed to enhance turbomachinery compo- nents efficiency. The aim of this work is to describe a complete tool for the aero-mechanical design of a radial in- fl...Multidisciplinary design optimization （MDO） is widely employed to enhance turbomachinery compo- nents efficiency. The aim of this work is to describe a complete tool for the aero-mechanical design of a radial in- flow turbine and a centrifugal compressor. The high rotational speed of such machines and the high exhaust gas temperature （only for the turbine） expose blades to really high stresses and therefore the aerodynamics design has to be coupled with the mechanical one through an integrated procedure. The described approach employs a fuUy 3D Reynolds Averaged Navier-Stokes （RANS） solver for the aerodynamics and an open source Finite Element Analysis （FEA） solver for the mechanical integrity assessment. Due to the high computational cost of both these two solvers, a meta model, such as an artificial neural network （ANN）, is used to speed up the optimization design process. The interaction between two codes, the mesh genera- tion and the post processing of the results are achieved via in-house developed scripting modules. The obtained results are widely presented and discussed.展开更多
文摘The tide of reform and opening up promotes the rapid development of science and technology in our society, and citizens have not only wimessed great improvement in basic material living conditions, but also have lived a fulfilled spiritual life. Material wealth stimulates self- awareness of rights protection of the citizens, and that＇s the issue of civil rights that we need to carry out in-depth studies on. As important rights of citizens, how can civil rights gain effective legal protection and how citizens themselves fully and effectively exercise the rights are problems asking for attention in the study of civil rights. Civil rights are not only the issue of inherence and existence, and we should also pay attention to its development or whether there is sustainable development. Moreover, how long this sustainability could last is also the issue of sustainable civil rights this thesis is going to discuss.
文摘Multidisciplinary design optimization （MDO） is widely employed to enhance turbomachinery compo- nents efficiency. The aim of this work is to describe a complete tool for the aero-mechanical design of a radial in- flow turbine and a centrifugal compressor. The high rotational speed of such machines and the high exhaust gas temperature （only for the turbine） expose blades to really high stresses and therefore the aerodynamics design has to be coupled with the mechanical one through an integrated procedure. The described approach employs a fuUy 3D Reynolds Averaged Navier-Stokes （RANS） solver for the aerodynamics and an open source Finite Element Analysis （FEA） solver for the mechanical integrity assessment. Due to the high computational cost of both these two solvers, a meta model, such as an artificial neural network （ANN）, is used to speed up the optimization design process. The interaction between two codes, the mesh genera- tion and the post processing of the results are achieved via in-house developed scripting modules. The obtained results are widely presented and discussed.
