Experimental Investigation of the Propeller Design for future QESTOL Aircraft in the BNF Project

Lenfers, Carsten; Janssen, R. L.; Beck, Nils; Friedrichs, Jens; Rezaeian, Alireza

doi:10.2514/6.2014-0562

Cited by 6 publications

(3 citation statements)

References 8 publications

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“…Through the 0.3 m diameter propeller test model, the change in the performance concerning the detrimental effect of the rear propeller by the interaction between the front and rear propellers mounted on the tandem wing was observed through the wind tunnel test [18]. In the experiment conducted on variable-pitch propellers, the performance curve characteristics that changed according to the pitch angle of the blades were confirmed through the dimensionless comparison of the propeller's performance [19][20][21][22].…”

Section: Introductionmentioning

confidence: 94%

A Study on the Scale Effect According to the Reynolds Number in Propeller Flow Analysis and a Model Experiment

Bae

Ryi

et al. 2022

Aerospace

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The demand for new propeller designs has increased alongside the development of new technology, such as urban aircraft and large unmanned aerial vehicles. In order to experimentally identify the performance of a propeller, a wind tunnel that provides the operating flow is essential. However, in the case of a meter class or larger propeller, a large wind tunnel is required and the related equipment becomes heavy; therefore, it is difficult to implement in reality. For this reason, propeller studies have been conducted via reduced models. In this case, it is necessary to investigate the different performance outputs between the full- and model-scale propellers due to the size difference. In the current study, a method is proposed to investigate the difference in the aerodynamic performance caused by the difference in propeller scale using VLM and RANS calculations, and the differences are analyzed. The wind tunnel test also verified the propeller performance prediction method. The boundary of aerodynamic performance independent of the Reynolds number could be predicted through the VLM based on the ideal fluid assumption. From the RANS calculations, it was possible to present the difference in the aerodynamic performance when propellers of the same geometry with different ratios were operated using different Reynolds numbers. It was confirmed that each numerical method matched well with the wind tunnel test results in the range of the advance ratio that produced the maximum efficiency, and from the results, it was possible to observe the change in aerodynamic performance that differed according to the scale change.

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Section: Introductionmentioning

confidence: 94%

A Study on the Scale Effect According to the Reynolds Number in Propeller Flow Analysis and a Model Experiment

Bae

Ryi

et al. 2022

Aerospace

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“…The design of the propulsion system is covered in papers by Rüdiger et al [12] and Lenfers [13]. The results of the wind-tunnel tests with regard to propeller performance are discussed in detail by Lenfers et al [14]. Like the lift and blowing momentum, the thrust created by the propeller can be made nondimensional by defining the coefficient of propeller thrust with respect to the wing area and freestream flow dynamic pressure:…”

Section: E Motor and Propellermentioning

confidence: 99%

Aerodynamic Effects of Propeller Slipstream on a Wing with Circulation Control

Beck

Radespiel

Lenfers

et al. 2015

Journal of Aircraft

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The German Bürgernahes Flugzeug (Citizen-Oriented Airplane) research program advances technologies for high-lift systems using circulation control Coandă-type flaps. The interaction of these high-lift systems with a propeller engine is the subject of the present work. A large and complex wind-tunnel model equipped with an active high-lift system and a powered propeller was designed, manufactured and instrumented. The wind-tunnel data show the potentials of the active high-lift system in three-dimensional wing applications. The results characterize and quantify the interactions between a propeller and a high-lift wing by using systematic variations of blowing momentum and propeller thrust. The results represent a unique database for future efforts to improve the efficiency of active lift and for validation of numerical simulation methods.

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“…Details of the propeller design process can be found in [8] while results concerning the propeller performance are published in [9]. The wing is equipped with five rows of pressure taps, depicted in Fig.…”

Section: Experimental Methodsmentioning

confidence: 99%

Propeller and Active High Lift Wing Interaction in Experiment and Simulation

Lenfers¹,

Beck²,

Bauer

2016

Notes on Numerical Fluid Mechanics and Multidisciplinary Design

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Within the German BNF research project a generic twin-engine configuration with an active high-lift wing and modern turboprop engines is investigated. This paper deals with high fidelity RANS computations of the wind tunnel configuration measured in previous measurement campaigns. The simulation data is in good agreement with the experiment. The presented investigations focus on the jet flow due to the internally blown flap and the propeller slipstream.

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Experimental Investigation of the Propeller Design for future QESTOL Aircraft in the BNF Project

Cited by 6 publications

References 8 publications

A Study on the Scale Effect According to the Reynolds Number in Propeller Flow Analysis and a Model Experiment

A Study on the Scale Effect According to the Reynolds Number in Propeller Flow Analysis and a Model Experiment

Aerodynamic Effects of Propeller Slipstream on a Wing with Circulation Control

Propeller and Active High Lift Wing Interaction in Experiment and Simulation

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