Semi-empirical modeling of fuselage–rotor interference for comprehensive codes: the fundamental model
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- 作者：Berend G. van der Wall ; André Bauknecht ; Sung N. Jung…
- 关键词：HART?II ; Fuselage–rotor interference ; Comprehensive code ; Rotor dynamics ; Rotor aerodynamics ; Rotor wake
- 刊名：CEAS Aeronautical Journal
- 出版年：2014
- 出版时间：December 2014
- 年：2014
- 卷：5
- 期：4
- 页码：387-401
- 全文大小：1,750 KB
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André Bauknecht (2)
Sung N. Jung (3)
Young H. You (3)
1. Institute of Flight Systems, German Aerospace Center (DLR), Lilienthalplatz 7, 38108, Braunschweig, Germany
2. Institute of Aerodynamics and Flow Technology, German Aerospace Center (DLR), Bunsenstra?e 10, 37073, G?ttingen, Germany
3. Department of Aerospace Information Engineering, Konkuk University, Seoul, 143-701, Republic of Korea - ISSN：1869-5590
文摘
The flow field around the isolated HART?II fuselage is computed by a computational fluid dynamics code. Velocities normal to the rotor rotational plane are extracted in a volume around the rotor as a data basis. A simple semi-empirical analytical formulation of the fuselage-induced velocities, based on parameter identification from computational fluid dynamics or measured data, is developed for use in comprehensive rotor codes. This model allows the computation of fuselage–rotor interferences on the rotor blade element level. It also allows the prediction of the rotor wake geometry deformation due to the presence of the fuselage in both prescribed wake and free-wake codes. Its impact on rotor thrust, power and trim is evaluated analytically using blade element momentum theory and by DLR’s comprehensive rotor code.