Optimum blade loading for a powered rotor in descent

Optimum blade loading for a powered rotor in descent

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 o...

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Veröffentlicht in:Chinese journal of aeronautics 2016-06, Vol.29 (3), p.580-584
Hauptverfasser: Modarres, Ramin, Peters, David A.
Format: Artikel
Sprache:eng
Schlagworte:
Climb
Descent
Helicopter
Inflow
Loading
Mathematical analysis
Optimization
Optimum
Rotors
Variational principles
Wakes
Wind turbines
动量理论
变分原理
叶片
最佳负荷
最佳负载
转子
载荷
风力涡轮机
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Peters, David A.
description 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.
doi_str_mv 10.1016/j.cja.2016.04.015
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source Elsevier ScienceDirect Journals Complete; EZB-FREE-00999 freely available EZB journals
subjects Climb
Descent
Helicopter
Inflow
Loading
Mathematical analysis
Optimization
Optimum
Rotors
Variational principles
Wakes
Wind turbines
动量理论
变分原理
叶片
最佳负荷
最佳负载
转子
载荷
风力涡轮机
title Optimum blade loading for a powered rotor in descent
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