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Chapter 5 Additional Remarks on Computational Procedure for Design In utilizing the inverse design code, there are several points to be stated. These are the grid used, the division of the total value of rV at the leading edge between the main and splitter blades, the stacking conditions of the main and splitter blades, and the iteration process. 5.1 The Computational Domain The turbine design conditions for the present study are summarized in Table I. The velocity triangle at the leading edge is shown in Fig. 5.1. The absolute Mach number at the inlet is computed to be equal to 0.98. The grid used for study has 97 nodes in the streamwise direction and 33 nodes in the spanwise direction. The number of harmonic modes is taken to be 8, which corresponds to 17 Fourier collocation points. 5.2 The Division of rVe between the Main and Splitter Blades The total value of rVe is to be divided between the main blade and the splitter blade. Especially, we have to decide what fraction of rVO at the leading edge is to be assigned to the splitter. That division can be arbitrary. However, in the present study, that division is based on the length of the splitter blade (the average of the meridional distances along the hub and the shroud). For instance, if we have a splitter blade which is half the length of the main blade, then the value of rVO at the leading edge will be 0.5/(1 + 0.5) = 1/3 of the total value of rVo at the leading edge. This linear divisionPDF Image | Radial Inflow Splitter Blades in Three-Dimensional
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