Author : National Aeronautics and Space Administration (NASA)
Release : 2018-07-02
Genre :
Kind : eBook
Book Rating : 099/5 ( reviews)
Book Synopsis Effect of Blade Planform Variation on a Small-Scale Hovering Rotor by : National Aeronautics and Space Administration (NASA)
Download or read book Effect of Blade Planform Variation on a Small-Scale Hovering Rotor written by National Aeronautics and Space Administration (NASA). This book was released on 2018-07-02. Available in PDF, EPUB and Kindle. Book excerpt: A hover test was conducted on a small-scale rotor model for three sets of tapered rotor blades and a baseline rectangular planform rotor blade. All configurations had the same airfoils, twist, and thrust-weighted solidity. The tapered blade planforms had taper initiating at 50, 75, and 94 percent of the blade radius with a taper ratio of 3 to 1 for each blade set. The experiment was conducted for a range of thrust coefficients, and the data were compared to the predictions of three hover analysis methods. The data show the 94 percent tapered blade was slightly more efficient at the higher rotor thrust levels. The other tapered planform rotors did not show the expected improvement over the baseline rotor, and all configurations had similar performance for low thrust coefficients. None of the analysis methods correlated well with the experimental data. Althoff, Susan L. and Noonan, Kevin W. Langley Research Center DA PROJ. 1L1-61102-AH-45-A; RTOP 505-61-51-10...
