Drag Reduction by Laminar Flow Control

Beck, Nils; Landa, Tim; Seitz, Arne; Boermans, Loek; Liu, Yaolong; Radespiel, Rolf

doi:10.3390/en11010252

Cited by 69 publications

(60 citation statements)

References 25 publications

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“…For this paper, the results of high fidelity computational fluid dynamics (CFD) analysis for LFC [55] have been used as reduction factors to update the aerodynamic analysis introduced in Section 3. The CFD calculated friction drag reduction for the wing and tail planes are around 68%, for the fuselage is 72%, which corresponds to a LFC factor of 0.72, i.e., the marked points in Figures 7 and 8 referring to "Max.…”

Section: Sensitivity Study Of Technology Progressmentioning

confidence: 99%

Exploring Vehicle Level Benefits of Revolutionary Technology Progress via Aircraft Design and Optimization

et al. 2018

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Abstract:It is always a strong motivation for aeronautic researchers and engineers to reduce the aircraft emissions or even to achieve emission-free air transport. In this paper, the impacts of different game-changing technologies together on the reduction of aircraft fuel consumption and emissions are studied. In particular, a general tool has been developed for the technology assessment, integration and also for the overall aircraft multidisciplinary design optimization. The validity and robustness of the tool has been verified through comparative and sensitivity studies. The overall aircraft level technology assessment and optimization showed that promising fuel efficiency improvements are possible. Though, additional strategies are required to reach the aviation emission reduction goals for short and medium range configurations.

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Section: Sensitivity Study Of Technology Progressmentioning

confidence: 99%

Exploring Vehicle Level Benefits of Revolutionary Technology Progress via Aircraft Design and Optimization

et al. 2018

Self Cite

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“…The computations provided for this paper were carried out with a Mach number of Ma = 0.7 and a Reynolds number of Re = 30 × 10 6 . More detailed information regarding XFOIL, its setup parameters and the conducted computations are given in [15]. The development of the boundary layer displacement and momentum thickness along the upper side of the profile is depicted in Figure 9.…”

Section: Boundary Conditionsmentioning

confidence: 99%

“…First parameter variations were carried out in order to study the impact of different thrust requirements (increased stepwise by 1000 N), altitudes and fan radii. The XFOIL computations, from which the boundary layer data come, are described by Nils Beck in [15]. He used 201 points to discretise the wing profile so that 100 panels were located on each side.…”

Section: Boundary Conditionsmentioning

confidence: 99%

Modelling of A Boundary Layer Ingesting Propulsor

Budziszewski

Friedrichs

2018

Energies

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Boundary layer ingestion is a promising method to decrease the propulsive power consumption of an aircraft, and therefore the fuel consumption. This leads to a reduced environmental impact and an improved cost-efficiency. To get a better understanding of this method and to estimate its benefits, the modelling of a propulsor located at the upper rear centerbody of a blended wing body aircraft is presented in this paper. A parallel compressor model approach is used to analyse the impact of the ingested low velocity fluid which leads to a non-uniform inflow. The required boundary layer data are generated with an analysis tool for 2D subsonic airfoils. Some parameter variations are conducted with the developed programme to study their impact on the power saving potential. In addition, a simple estimation for the benefit of embedded aeroengines is given. Despite the drawback from fan efficiency due to the inflow distortion, the results show a significant decrease in required propulsive power for boundary layer ingestion in combination with integrated engines.

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“…As shown in Figure 1, one possible application for long-range traffic is the blended wing body (BWB) airplane. Compared to the conventional baseline, the BWB implicates remarkable performance improvements, including drastic reductions in aerodynamic drag together with laminar flow control on wings and fuselage and structural mass reduction [3]. The BWB with multiple aisle cabin layout may reduce boarding times and tends to result in minimized minimum connecting times, as the boarding is on the critical path.…”

Section: Future Aircraft Designsmentioning

confidence: 99%

A Generic Approach to Analyze the Impact of a Future Aircraft Design on the Boarding Process

et al. 2018

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Abstract:The turnaround process constitutes an important part of the air transportation system. Airports often represent bottlenecks in air traffic management (ATM), thus operations related to the preparation of the aircraft for the next flight leg have to be executed smoothly and in a timely manner. The ATM significantly depends on a reliable turnaround process. Future paradigm changes with respect to airplane energy sources, aircraft design or propulsion concepts will also influence the airport layout. As a consequence, operational processes associated with the turnaround will be affected. Airlines aim for efficient and timely turnaround operations that are correlated with higher profits. This case study discusses an approach to investigate a new aircraft design with respect to the implications on the turnaround. The boarding process, as part of the turnaround, serves as an example to evaluate the consequences of new design concepts. This study is part of an interdisciplinary research to investigate future energy, propulsion and designs concepts and their implications on the whole ATM system. Due to these new concepts, several processes of the turnaround will be affected. For example, new energy storage concepts will influence the fueling process on the aircraft itself or might lead to a new infrastructure at the airport. This paper aims to evaluate the applied methodology in the case of a new boarding process, due to a new aircraft design, by means of a generic example. An agent-based boarding simulation is applied to assess passenger behavior during boarding, particularly with regard to cabin layout and seat configuration. The results of the generic boarding simulation are integrated into a simplified, deterministic and generic simulation of the turnaround process. This was done to assess the proposed framework for future investigations which on the one hand address the ATM system holistically and on the other, incorporate additional or adapted processes of the turnaround.

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Drag Reduction by Laminar Flow Control

Cited by 69 publications

References 25 publications

Exploring Vehicle Level Benefits of Revolutionary Technology Progress via Aircraft Design and Optimization

Exploring Vehicle Level Benefits of Revolutionary Technology Progress via Aircraft Design and Optimization

Modelling of A Boundary Layer Ingesting Propulsor

A Generic Approach to Analyze the Impact of a Future Aircraft Design on the Boarding Process

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