G. Pagano, F. Nannoni, M. Simoni, H.J. Langer

This paper presents the results of a detailed analysis performed on the available data of the wind tunnel testing performed at DNW on an isolated articulated 4-bladed main rotor model [ref s. 1 and 2). The correlation with prediction methods and flight tests data is discussed in terms of global data, i.e. power level, rotor forces, control angles and control loads. Different prediction methods are applied, ranging from energy methods and simplified trim algorithm to a blade element code; the codes are described in terms of characteristics, input data and solution procedures, and level of confidence already gained with flight test data comparison. A general discussion then follows on the effects of some simulation parameters, both in calculation methods and in wind tunnel modeling, like the blade dynamics representation and the rotor system configuration. The differences in flight and tunnel measurement techniques and the reduction procedures applied in the comparison of data from different sources are analyzed and discussed. The conclusions state the level of confidence achieved in tunnel simulation and model testing, and in the prediction of rotor characteristics (performance and loads); further improvements required and future work in the improvement of all techniques (calculation and testing) are discussed.

17th European Rotorcraft Forum 1991, Berlin

Conference Paper

englisch

21,0 x 29,7 cm, 22 Seiten

DGLR-Bericht, 1991, 1991-08, 17th European Rotorcraft Forum Proceedings; 1991; Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn

NA

Dieser Aufsatz ist nicht Teil der Veröffentlichung!

flight tests, helicopters, rotors, wind tunnel tests

Bestellbar

1991