Torque-speed characteristics for electrically powered rim driven fans and thrust comparison with a small conventional fan jet engine
Bolam, Robert, Roque, Jhon Paul, Vagapov, Yuriy and Day, Richard (2022) Torque-speed characteristics for electrically powered rim driven fans and thrust comparison with a small conventional fan jet engine. In: 57th IEEE International Universities Power Engineering Conference UPEC-2022, 30 Aug. - 2 Sept. 2022, Istanbul, Turkey.
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GURO_2022145934 Torque Speed.pdf Available under License Creative Commons Attribution. Download (1MB) | Preview |
Abstract
The aim of this paper is to provide a method of estimating torque versus speed characteristics of single and dual-stage electrically powered Rim Driven Fans which are intended for aircraft propulsion. The methodology is based on the well-known Euler equation which considers the change in angular momentum of the air as it passes through the fan rotors. A derivation of the useful and versatile Specific Work parameter (Y) is provided along with its important relationship with the fan Work Co-efficient (ψ) and an explanation of the relevance of the Fan Flow Co-efficient (∅) in determining the flow of air through the RDF device. An equation is derived which relates the fan torque to its rotational speed and a specimen calculation of a 200 mm inlet diameter RDF has been provided. Electrical performance graphs, generated with Motor-CAD LAB software, are included to illustrate an example of a suitably optimised RDF motor circuit. Finally, a thrust performance comparison is made between a theoretical dual-stage RDF and a commercially available fan-jet engine. It is demonstrated that the dual-stage RDF technology could offer a viable solution to power high-speed medium and large commercial transport aircraft, making them particularly suited to distributed thrust system architectures and blended-wing-body aircraft designs.
| Item Type: | Conference or Workshop Item (Paper) |
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| Keywords: | zero emission flight , rim driven fan , aircraft electrical propulsion , contra-rotating fans |
| Divisions: | Applied Science, Computing and Engineering |
| Depositing User: | Hayley Dennis |
| Date Deposited: | 02 Nov 2022 13:35 |
| Last Modified: | 02 Nov 2022 13:35 |
| URI: | https://glyndwr.repository.guildhe.ac.uk/id/eprint/17940 |
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