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  • ASME International  (2)
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  • ASME International  (2)
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  • 1
    Online Resource
    Online Resource
    ASME International ; 1980
    In:  Journal of Mechanical Design Vol. 102, No. 1 ( 1980-01-01), p. 162-167
    In: Journal of Mechanical Design, ASME International, Vol. 102, No. 1 ( 1980-01-01), p. 162-167
    Abstract: This paper presents a way of analyzing the vibration of a rotor shaft system coupled with flexible impellers based on the transfer method. Each of the flexible impellers is modelled so that it comprises an inertia and an elastic hinge based on the assumption that any impeller’s vibration mode except its one-nodal diameter has no dynamical connection with a shaft. The stiffness of the hinge is based on the eigen frequency of its mode calculated by means of a finite element method, or obtained by experiment. The method developed allows the calculation of the vibration response of a rotor shaft system consisting of several flexible impellers and several bearings when it is subject to an out-of-balance force. Theoretical results are compared with experimental data and show very satisfactory agreement. This simple method appears therefore to be practical and efficient to predict the dynamical characteristics of a high speed rotor system with coupling of impeller flexibility.
    Type of Medium: Online Resource
    ISSN: 0161-8458
    Language: English
    Publisher: ASME International
    Publication Date: 1980
    Location Call Number Limitation Availability
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  • 2
    Online Resource
    Online Resource
    ASME International ; 1980
    In:  Journal of Fluids Engineering Vol. 102, No. 4 ( 1980-12-01), p. 486-493
    In: Journal of Fluids Engineering, ASME International, Vol. 102, No. 4 ( 1980-12-01), p. 486-493
    Abstract: An experimental investigation to improve the stage efficiency through the use of vaned diffusers is presented. Sixteen different vaned diffusers were tested on a model compressor rig. The results showed that the pressure recovery of the vaned diffuser increased up to the critical diffusion ratio, which was shown to be approximately 0.5. The measured pressure distribution around vanes of the well-designed diffusers which had the fair diffusion ratios, were found to agree well with the potential flow solutions. Finally, the importance of the diffuser inlet configuration to the improvement of the stage efficiency is discussed.
    Type of Medium: Online Resource
    ISSN: 0098-2202 , 1528-901X
    Language: English
    Publisher: ASME International
    Publication Date: 1980
    Location Call Number Limitation Availability
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