In today’s marketplace the repairs of various components especially long lead items for turbomachinery equipment are an important factor for the maintaining reliability and performance of the equipment. This paper will describe repairs applied to compressors

Abstract In this paper, various averaging techniques commonly used in turbomachinery applications are analyzed. It is shown how the work average relates to Miller’s mechanical potential and that it is, a certain way, consistent with Hartsel’s cooled turbine efficiency. found key understand these approaches analyze impact entropy variations at inflows have on them. Second-order asymptotics of mi...

This paper describes methods and test beds for components of turbomachinery, use in automotive fuel cell applications at the Ostfalia University applied sciences. Turbomachinery is subject to different requirements than those conventional turbochargers. Therefore, turbine air bearings an electrical turbocharger will be evaluation. The boundary conditions comparison turbochargers, with less heat...

Turbomachinery disks are heavy, highly stressed components used in gas turbines. Improved design of turbomachinery disks could yield a significant reduction in engine weight. This paper focuses on rapid low fidelity design and optimization of isotropic and transversely isotropic disks. Discussion includes the development of a one dimensional plane stress model, disk parameterization methods, an...

The turbomachinery systems on oil platforms are extremely sensitive, as their failure can cause total shutdown of the platform's production activity. Scheduled stoppages for preventive maintenance are effective, since qualified personnel and replacement parts are available and ready. On the other hand, shutting down a turbo machine ceases petroleum production. Not rarely, maintenance people con...

This paper presents an optimization tool used for the design of turbomachinery components. It is based on a metamodel assisted evolutionary approach combined with a Computer Aided Design (CAD) library for the shape generation. The analysis of the components performance is performed by Computational Solid Mechanics (CSM) and Computational Fluid Dynamics (CFD). Typical optimization problems inclu...

In recent years, there has been rapid progress in aerodynamic optimization methods which use adjoint ow analysis to e ciently calculate the sensitivity of steady-state objective functions to changes in the underlying design variables. This paper shows that the same adjoint approach can be used in turbomachinery applications in which the primary concern is blade vibration due to harmonic ow unst...