Experimental Investigation of Impacting Flow between a Sub-Scale Twin-Rotor Configuration

International Journal of Engineering and Technology Innovation

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Field Value
Title Experimental Investigation of Impacting Flow between a Sub-Scale Twin-Rotor Configuration
Creator Mehrabi, Ali
Davari, Ali Reza
Subject semi-quiescent
impacting flow
ground effect
twin-rotor configuration
pressure distribution
Description In this paper, a series of experiments have been performed to understand the semi-quiescent and the impacting flow structure beneath the twin-rotor configuration body using a multipurpose test stand with a sub-scale model airframe in the ground effects. So, the main purpose was to perform a qualitative investigation on the recirculated impacting flow between the twin-rotors. Pressure and velocity measurements were performed by the pressure ports embedded longitudinally along the airframe. The results show that for a single rotor an impinging jet-like small region and rearward and upward flows were below the body. The presence of the second rotor in configurations causes an impacting flow formation in the longitudinal center region below the airframe and a semi-quiescent flow formed there. The positive effects of this flow includes increasing the sub-body pressure and lifting force, the pressure distribution balance, and desirable pressure gradient on sidewalls of the airframe. Tuft tests observations confirm that the location of the impacting flow formation is affected by the pressure and velocity measurements. The mentioned impacting flow aerodynamic effects must be taken into account in design of the flight controls trims and stability systems of twin-rotor configurations.
Publisher Taiwan Association of Engineering and Technology Innovation
Date 2020-07-01
Type info:eu-repo/semantics/article
Format application/pdf
Identifier http://ojs.imeti.org/index.php/IJETI/article/view/ijeti.2020.4933
Source International Journal of Engineering and Technology Innovation; Vol 10 No 3 (2020); 211-224
Language eng
Relation http://ojs.imeti.org/index.php/IJETI/article/view/ijeti.2020.4933/967
Rights Copyright (c) 2020 Ali Mehrabi, Ali Reza Davari

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