Title
A review of momentum models for the actuator disk in yaw
Author
Hur, C.
Berdowski, T.
Ferreira, C.
Schepers, G.
Boorsma, K.
Publication year
2019
Abstract
BEM (Bladed Element Momentum) models have shown to be inaccurate in predicting loads in the case of yawed flow [1-3]. Actuator disk momentum theory is the basis for BEM codes, following Glauert's auto-gyro theory [4]. Therefore, a first step to improve BEM in yawed flow is to assess momentum models for the actuator disk in yaw and investigate possibilities for improvement. In the past, several models have been developed for an actuator disc under yawed conditions, but they are subject to various assumptions. In this paper, different yaw models for the actuator disk will be reviewed and compared against higher fidelity models: fixed and free [5] wake vortex models so that the earlier made assumptions can be assessed. The comparison considers the case of a uniformly loaded actuator disk at varying yaw angle (0ø90ø) and thrust coefficient (0.1~0.9). From the models which have been assessed, 'ye's correction [6] performs best, however, this model too suffers from deficiencies. This indicates that an improved momentum model for yawed flow is necessary. (c) 2019 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.
Subject
Energy Efficiency
Energy / Geological Survey Netherlands
Aviation
Boundary element method
Flight dynamics
Momentum
To reference this document use:
http://resolver.tudelft.nl/uuid:29e93485-b480-4859-90bb-bffa8beae3a4
DOI
https://doi.org/10.2514/6.2019-1799
TNO identifier
868198
Publisher
American Institute of Aeronautics and Astronautics Inc, AIAA
ISBN
9781624105784
Source
AIAA Scitech 2019 Forum, AIAA Scitech Forum, 2019, 7 January 2019 through 11 January 2019, 1-15
Document type
conference paper