Optimum blade loading for a powered rotor in descent |
| |
Institution: | Department of Mechanical Engineering&Materials Science, Washington University in St. Louis, St. Louis, M0 63130, USA |
| |
Abstract: | The optimum loading for rotors has previously been found for hover, climb and wind turbine conditions;but, up to now, no one has determined the optimum rotor loading in descent. This could be an important design consideration for rotary-wing parachutes and low-speed des-cents. In this paper, the optimal loading for a powered rotor in descent is found from momentum theory based on a variational principle. This loading is compared with the optimal loading for a rotor in hover or climb and with the Betz rotor loading (which is optimum for a lightly-loaded rotor). Wake contraction for each of the various loadings is also presented. |
| |
Keywords: | Descent Helicopter Inflow Loading Optimum |
本文献已被 CNKI 万方数据 等数据库收录! |
|