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Influence of the rotor configuration on the electrostatic charging of helicopters

Grosshans, Holger LU ; Szász, Robert Zoltan LU and Papalexandris, Miltiadis V. (2018) In AIAA Journal 56(1). p.368-375
Abstract

A helicopter flying through an atmosphere containing particulates may accumulate high electrostatic charges that can challenge its operational safety. In this paper the influence of the helicopter configuration on its electrification is reported. The current study is based on a recently developed numerical approach in which the turbulent airflow around the rotorcraft is estimated via large-eddy simulations, whereas the particulate flow is computed via Lagrangian particle tracking. Also, this approach incorporates a model for the triboelectric charge transfer during particle-helicopter collisions that is briefly described herein. The configurations examined in the study include rotor systems equipped with two, three, or four blades. Also... (More)

A helicopter flying through an atmosphere containing particulates may accumulate high electrostatic charges that can challenge its operational safety. In this paper the influence of the helicopter configuration on its electrification is reported. The current study is based on a recently developed numerical approach in which the turbulent airflow around the rotorcraft is estimated via large-eddy simulations, whereas the particulate flow is computed via Lagrangian particle tracking. Also, this approach incorporates a model for the triboelectric charge transfer during particle-helicopter collisions that is briefly described herein. The configurations examined in the study include rotor systems equipped with two, three, or four blades. Also investigated are the effects of the rotor size and its rotational frequency. The current results predict that a helicopter with fewer blades accumulates less electric current, even though the charge on each individual blade is higher. Furthermore, the location of the charge buildup on the rotor disk depends strongly on the number of blades. Also, according to current computations, a reduction of the rotor size leads to a reduction of its electrification, even if the blade tip velocity is kept constant.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
AIAA Journal
volume
56
issue
1
pages
8 pages
publisher
American Institute of Aeronautics and Astronautics
external identifiers
  • scopus:85040561391
ISSN
0001-1452
DOI
10.2514/1.J056242
language
English
LU publication?
yes
id
dc6a7ee9-487c-4bfd-826e-47d52a8b7c5d
date added to LUP
2018-01-30 14:58:16
date last changed
2018-01-30 14:58:16
@article{dc6a7ee9-487c-4bfd-826e-47d52a8b7c5d,
  abstract     = {<p>A helicopter flying through an atmosphere containing particulates may accumulate high electrostatic charges that can challenge its operational safety. In this paper the influence of the helicopter configuration on its electrification is reported. The current study is based on a recently developed numerical approach in which the turbulent airflow around the rotorcraft is estimated via large-eddy simulations, whereas the particulate flow is computed via Lagrangian particle tracking. Also, this approach incorporates a model for the triboelectric charge transfer during particle-helicopter collisions that is briefly described herein. The configurations examined in the study include rotor systems equipped with two, three, or four blades. Also investigated are the effects of the rotor size and its rotational frequency. The current results predict that a helicopter with fewer blades accumulates less electric current, even though the charge on each individual blade is higher. Furthermore, the location of the charge buildup on the rotor disk depends strongly on the number of blades. Also, according to current computations, a reduction of the rotor size leads to a reduction of its electrification, even if the blade tip velocity is kept constant.</p>},
  author       = {Grosshans, Holger and Szász, Robert Zoltan and Papalexandris, Miltiadis V.},
  issn         = {0001-1452},
  language     = {eng},
  number       = {1},
  pages        = {368--375},
  publisher    = {American Institute of Aeronautics and Astronautics},
  series       = {AIAA Journal},
  title        = {Influence of the rotor configuration on the electrostatic charging of helicopters},
  url          = {http://dx.doi.org/10.2514/1.J056242},
  volume       = {56},
  year         = {2018},
}