Experimental investigations of boundary layer transition on a flat plate with suction

Grappadelli, Michelangelo Corelli; Sattler, Stephan; Scholz, Peter; Radespiel, Rolf; Badrya, Camli

doi:10.2514/6.2021-1452

Cited by 9 publications

(8 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Reynolds number varied between 4 -8 Million. The experiments yielded valuable experience on the design of compliant suction chambers, and indicate fluid mechanical constraints on the allowed suction holes as well as suction effects on critical N-factors [18].…”

Section: Fig 8: Design Concept Of Suction Flow Design and Typical Sizing Data Of Suction Buffer Holes For For Short Range Reference Aircrmentioning

confidence: 99%

Vehicle Technologies towards Sustainable and Energy Efficient Aviation

Friedrichs

Elham

Hühne

et al. 2022

AIAA SCITECH 2022 Forum

Self Cite

View full text Add to dashboard Cite

The overall mission is research and fundamental technological development for a sustainable future global air transport system. Following the vision of zero fossil fuel usage in aviation in a 2050 timeframe, reducing material and noise emissions while keeping air transport affordable on short to long range missions, SE²A focuses on significantly reducing the aircraft energy demand in combination with future energy storage and conversion technologies. This large design space makes preliminary system design and assessment based on models of different fidelity level indispensable. In this paper, the framework and research structure of the Cluster is described as well as a special focus on relevant and required vehicle technologies. This follows the need for a significant reduction of the mission energy to allow for future alternative propulsion systems and covers means for radical reductions in aircraft drag and dynamic loads, which in turn allow for reduced operating empty weight. An overall aircraft design methodology is employed for integration and assessment of technological progress. Such analysis is used to identify and quantify snowball effects and to prioritize technologies, but also to identify conflicting areas and requirements.

show abstract

Section: Fig 8: Design Concept Of Suction Flow Design and Typical Sizing Data Of Suction Buffer Holes For For Short Range Reference Aircrmentioning

confidence: 99%

Vehicle Technologies towards Sustainable and Energy Efficient Aviation

Friedrichs

Elham

Hühne

et al. 2022

AIAA SCITECH 2022 Forum

Self Cite

View full text Add to dashboard Cite

show abstract

“…If the same approach is applied to momentum equations, the final system of equations will be: For an inviscid flow, where the Reynolds number is so high, the viscous term can be neglected. The pressure is constant as obtained in the Equation (11) and v = 0. Equation (10) will be:…”

Section: Blasius Flow Problemmentioning

confidence: 99%

“…Since the focus of the present paper is the fundamentals of laminar boundary-layer theory, the details will not be provided about advanced researches. However, readers who are interested in details may check [9][10][11][12] for subsonic boundary-layer transition, Ref. [13][14][15][16][17][18][19][20][21] for supersonic/hypersonic boundary-layer transition, and Ref.…”

Section: Introductionmentioning

confidence: 99%

A CFD Tutorial in Julia: Introduction to Laminar Boundary-Layer Theory

Kara

2021

Fluids

View full text Add to dashboard Cite

Numerical simulations of laminar boundary-layer equations are used to investigate the origins of skin-friction drag, flow separation, and aerodynamic heating concepts in advanced undergraduate- and graduate-level fluid dynamics/aerodynamics courses. A boundary-layer is a thin layer of fluid near a solid surface, and viscous effects dominate it. Students must understand the modeling of flow physics and implement numerical methods to conduct successful simulations. Writing computer codes to solve equations numerically is a critical part of the simulation process. Julia is a new programming language that is designed to combine performance and productivity. It is dynamic and fast. However, it is crucial to understand the capabilities of a new programming language before attempting to use it in a new project. In this paper, fundamental flow problems such as Blasius, Hiemenz, Homann, and Falkner-Skan flow equations are derived from scratch and numerically solved using the Julia language. We used the finite difference scheme to discretize the governing equations, employed the Thomas algorithm to solve the resulting linear system, and compared the results with the published data. In addition, we released the Julia codes in GitHub to shorten the learning curve for new users and discussed the advantages of Julia over other programming languages. We found that the Julia language has significant advantages in productivity over other coding languages. Interested readers may access the Julia codes on our GitHub page.

show abstract

“…In [13] Methel et al applied an alternative design goal, to reduce the suction peak, and also obtained an asymmetric nose geometry. The design of a symmetric nose was demonstrated by Grappadelli et al in [14], which is not appropriate for these experiments at the given model thickness, due to the required half-axis ratio of the windward nose part. The obvious difference between those geometries and the present nose geometry is the double suction peak shown in the pressure distribution in Fig.…”

Section: Tollmien-schlichting Waves In the Flat Plate Boundary Layermentioning

confidence: 99%

Experimental investigation of hybrid laminar flow control by a modular flat plate model in the DNW-NWB

Lüdeke

Breitenstein

2021

CEAS Aeronaut J

View full text Add to dashboard Cite

To determine the characteristics of new suction concepts for hybrid laminar flow control (HLFC) a modular flat plate wind tunnel model is investigated in the DNW-NWB wind tunnel facility. This approach allows detailed examination of suction characteristics in consideration of realistic boundary layer flow conditions. The following evaluation reveals the effects of joining methods between successive panels and other surface disturbances of porous materials and underlying chambers on HLFC techniques. After successful measurements with and without suction panels, this paper compares experimental results with theoretical and numerical approaches and draws conclusions from N-factor results and boundary layer (BL) measurements.

show abstract

Experimental investigations of boundary layer transition on a flat plate with suction

Cited by 9 publications

References 13 publications

Vehicle Technologies towards Sustainable and Energy Efficient Aviation

Vehicle Technologies towards Sustainable and Energy Efficient Aviation

A CFD Tutorial in Julia: Introduction to Laminar Boundary-Layer Theory

Experimental investigation of hybrid laminar flow control by a modular flat plate model in the DNW-NWB

Contact Info

Product

Resources

About