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considerations. A set of typical results from his work is presented in Fig. 1.1 to 1.6. Fig. 1.1 and 1.2 show the rV distribution along the hub and the shroud, respectively. The values have been non-dimensionalized by the value of rV9 at the leading edge. The maximum derivatives of rV, denoted by ( o),ax, along the hub and shroud are the same. Fig. 1.3 shows the rVO distribution within the blade region based on the rational technique Yang (Ref. 1) developed for generating rVo distribution. The resulting blade shape is shown in Fig. 1.4. It is not too difficult to deduce that the blade filament is highly non-radial. The relative Mach number contours on the pressure side is shown in Fig. 1.5 indicating a region with reversed flow. This region of inviscid reversed flow covers almost half of the blade region. The blade cross section at constant z section is shown in Fig. 1.6; note that the value of lean angle can get as high as 56.3* at the trailing edge. Near the leading edge (to be more precise, on cross section at z = 0.05 -zT.E.), the lean angle is 6.80. Thus there is a need to find means of relieving these two inadequacies in Yang's design calculations. The need to eliminate or to reduce the inviscid reversed flow region on the pressure surface as well as to make the blade filament as radial as possible motivate the work presented in this thesis. 1.2 Technical Approach As noted by Yang, a way of reducing the extent of the reversed flow region on the pressure side is to increase the number of blades (Ref. 1, section 6.6). However, this approach does not make the blade filament more radial. Instead of adding more "full-length" blades, we can choose the alternative of adding splitter blades, which are "partial-length" blades. The splitter blades will extend from the leading edge to a distance which is approximately 2/3 chord of the main blades. The splitter blades willPDF Image | Radial Inflow Splitter Blades in Three-Dimensional
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