Applications and data of generalised dynamic wake theory of the flow in a rotor wake

Zhongyang Fei; David A. Peters

Applications and data of generalised dynamic wake theory of the flow in a rotor wake

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Author(s): Zhongyang Fei ¹ and David A. Peters ²
- Affiliations: 1: Research Institute of Intelligent Control and Systems, Harbin Institute of Technology, Harbin 150080, Heilongjiang Province, People's Republic of China ;
  2: Department of Mechanical Engineering and Materials Science, Washington University in Saint Louis, Saint Louis, Missouri 63130, USA
Source: Volume 9, Issue 7, 23 April 2015, p. 1051 – 1057
DOI: 10.1049/iet-cta.2014.0710 , Print ISSN 1751-8644, Online ISSN 1751-8652

Received 30/06/2014, Accepted 10/09/2014, Revised 13/08/2014, Published

A new co-state method with a finite number of states was recently expanded to be able to calculate the inflow below the rotor disk. The expanded model is derived in a mathematically rigorous way from the potential flow equations. It offers an efficient mean of doing real-time simulation of rotary wing systems and generating the data for design and control purpose. In this study, as an important application of the generalised dynamic wake theory, the new method is used to compute inflow in the wake of a rotor with a finite number of blades. The three velocity components are calculated in the time domain for axial flow. The velocities are plotted at different distances from the rotor disk and compared with the Glauert prediction for axial flow and wake swirl. In the finite-state model, the angular momentum does not jump instantaneously across the disk (as predicted by Glauert), but it does transit rapidly across the disk to correct Glauert value.

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Applications and data of generalised dynamic wake theory of the flow in a rotor wake

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