Effect of stage spacing on performance of 3.75-inch-mean-diameter two-stage turbine having partial admission in the first stage

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National Aeronautics and Space Administration, 1964 - Technology & Engineering - 22 pages
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"The design and the experimental investigation of a 3.75-inch-mean-diameter partial-admission two-stage turbine are presented herein. The investigation was made to determine the effect on two-stage-turbine performance of a change in the axial distance between stages for a turbine with partial admission in the first stage. Accordingly, the turbine was designed with 31.3-percent admission in the first stage, full admission in the second stage, and provision for changing the axial distance between stages. The results of the two-stage investigation are presented for each of the axial distances between stages of 0.25, 0.50, 0.75, 1.00, 1.50, and 2.00 inches. The results of the first-stage investigation are also presented, together with a calculated efficiency for the second stage, at each value of stage spacing as calculated from the two-stage and first-stage results."--P. [1].

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