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• W2050193267 abstract "Abstract A design method based on the iterative use of a direct (analysis) time-marching method and able to cope with heavily loaded two-dimensional blade rows is presented. This method uses as the design input an imposition of the mean (mass-averaged) tangential velocity, V y , distribution together with the definition of the desired normal blade thickness given as functions of distance along the blade axial chord. It is shown that this design input is equivalent to the use of the more frequent specification of the blade pressure loading and thickness distributions. The procedure starts by calculating the flow field produced by a guessed cascade geometry using a direct (analysis) code. In general, the calculated distribution of the mean tangential velocity using this guessed geometry will be different from the desired distribution. This difference is used in the code to generate a new cascade geometry by changing the camberline shape. Afterwards a new iteration loop is entered and the whole process repeated until convergence in the blade geometry is achieved. Although any robust two-dimensional flow solver could have been employed, an explicit time-marching program based on a finite-volume discretization was adopted in the present implementation. Special care was taken with the grid used in the calculations, in order to allow the correct determination of the flow field produced by highly loaded blade rows. The code was tested by running one of the Hobson's cascades, in the analysis mode. Then it was decided to use the results thus obtained as a starting point to the developed inverse technique. In addition, a cascade typical of a stator blade row was designed. This turbine cascade has an overall deflection of 95 ° and an isentropic exit Mach number of 1.0. These examples are used to bring out the relationship between the blade pressure loading and the derivative of the mean tangential velocity distribution." @default.
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• W2050193267 date "1996-02-01" @default.
• W2050193267 modified "2023-10-16" @default.
• W2050193267 title "Iterative use of a time-marching code for designing turbomachine blade rows" @default.
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• W2050193267 doi "https://doi.org/10.1016/0045-7930(95)00038-0" @default.
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