Design of a rotor blade tip for the investigation of dynamic stall in the transonic wind-tunnel Göttingen-Reference-Cited by-同舟云学术

Design of a rotor blade tip for the investigation of dynamic stall in the transonic wind-tunnel Göttingen

Published:2016-07-04 Issue:1232 Volume:120 Page:1509-1533
ISSN:0001-9240
Container-title:The Aeronautical Journal
language:en
Short-container-title:Aeronaut. j.

Author:

Lütke B.,Nuhn J.,Govers Y.,Schmidt M.

Abstract

ABSTRACTThe aerodynamic and structural design of a pitching blade tip with a double-swept planform is presented. The authors demonstrate how high-fidelity finite element (FE) and computational fluid dynamic (CFD) simulations are successfully used in the design phase. Eigenfrequencies, deformation, and stress distributions are evaluated by means of a three-dimensional (3D) FE model. Unsteady Reynolds-averaged Navier-Stokes (RANS) simulations are compared to experimental data for a light dynamic stall case atMa= 0.5,Re= 1.2 × 106. The results show a very good agreement as long as the flow stays attached. Tendencies for the span-wise location of separation are captured. As soon as separation sets in, discrepancies between experimental and numerical data are observed. The experimental data show that for light dynamic stall cases atMa= 0.5, a factor of safety ofFoS= 2.0 is sufficient if the presented simulation methods are used.

Publisher

Cambridge University Press (CUP)

Subject

Aerospace Engineering

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