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DTIC AD0256533: SHROUDED PROPELLER INVESTIGATIONS: PROPELLER TIP CL... |
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by Defense Technical Information Center |
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Wind tunnel tests were conducted on a shrouded propeller |
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model in which the propeller diameter was varied for the |
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purpose of measuring the effects of tip to shroud |
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clearance. The basic model tested contained a four-bladed |
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variable pitch propeller operating within a 0.50 |
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chord/diameter ratio shroud. To assist in studying the |
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effect of annulus area on tip clearance, two models |
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having 0.30 and 0.40 hub/tip diameter ratio centerbodies |
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were tested over roughly the same range of propeller tip |
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clearances. Performance of the models was measured |
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throughout a range of advance ratios from zero to roughly |
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2.20 at several propeller blade pitch settings at zero |
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angle of attack only. Results are presented in the form |
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of force and power coefficients and efficiency varying |
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with propeller tip clearance and rotational speed for |
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forward and static flight conditions. |
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Date Published: 2018-03-07 22:41:21 |
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Identifier: DTIC_AD0256533 |
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Item Size: 63294706 |
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Language: english |
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Media Type: texts |
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# Topics |
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DTIC Archive; HOEHNE, VERNON O ; WICH... |
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