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Radial Inflow Splitter Blades in Three-Dimensional

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Radial Inflow Splitter Blades in Three-Dimensional ( radial-inflow-splitter-blades-three-dimensional )

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set to zero. This corresponds to the condition of zero incidence angle at the leading edge. In this section, a swirl distribution with non-vanishing a'va at the leading edge (i.e., non-zero incident angle) is examined, and this case will be referred to as case h. The rVe distributions along the hub and the shroud are shown in Fig. 6.23 and 6.24. The maximum loading along the shroud for the main blade is the same as that of case d (-3), but on the splitter blade it is reduced to -2.5 because the distance along the shroud for the splitter is shorter than that for the main blade. Along the hub of the main blade, a region of finite loading is used to avoid the occurrence of small mean velocity. The value of arVa at the leading edge is taken to be -1.25 (normalized by the value of rVe at the leading edge of the main blade). This number is chosen so that the resulting E-1 along the hub and shroud near the leading edge is close to zero (see Fig. 6.25). As expected, this vanishing value of WO near the leading edge results in highly radial blade shape at location z = 0.05zT.E., a location near the leading edge (see Fig. 6.26). This is desirable from structural consideration. The Wrap Factor is calculated to be 0.27 for this case. It results in lean angle of 6.0* at the trailing edge. This again shows the correlation between the Wrap Factor and the lean angle and confirms to the trend shown in Table 6.1 above. 6.5 Non-vanishing P2 at the Leading Edge and the Trailing Edge The condition of 2 = 0 at the leading edge and trailing edge has been imposed so that V rVe is C2 continuous at those locations. However, it is not required by any physical or mathematical constraint. Hence, in this section this condition is relaxed and the degrees of polynomials at Section 1 and Section 3 are reduced by one (see Sec 4.3). This will be referred to as case i. The rVO distributions along the hub and shroud are shown in Fig. 6.27 and 6.28,

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