In a cooperation project* with the Institute of Fluid Mechanics and Turbomachinery at the Technical University of Kaiserslautern, CFD Consultants GmbH is currently developing a panel method for the fast calculation of aerodynamic coefficients of arbitrary 3D geometries.
The panel method shows its strength especially when (…)
We are pleased to be part of the partner network founded by Wouter Remmerie in the fields of CAD, 3D scanning, CFD and wind tunnel testing technology. This partner network (…)
CFD Consultants GmbH has been significantly involved in the aviation project TR230 for many years. This project concerns the development and certification of a modern four-seater passenger aircraft. The prototype has been flying since 2013, has almost completed flight testing and is about to be (…)
As part of the aviation research programme of the Federal Ministry of Economics and Energy (BMWi), the joint project PRESTIGE was launched in 2018. This project brings together partners from academic research and industry and is dedicated to the further development and validation of simulation methods to improve the interdisciplinary understanding of engine systems.
One goal of the project (…)
The Managing Director of CFD Consultants GmbH, Dr. Volker Kassera, participated in the 10th Chinese Entrepreneurs Convention on Technology Innovation and Cooperation & Overseas Chinese Entrpreneurs Industrial Development Forum in Yantai in the Chinese province of Shandong on 29.10.2019.
The aim of the participation was…
Our subsidiary iViation GmbH has established an office in Wuhan (capital of the Chinese province Hubei).
On 20 February 2019 the Business License was granted by the local authorities.
Dr. Volker Kassera, President of iViation GmbH
iViation Wuhan’s business premises are located in the newly built General Aviation Airpark.
Together with the local universities, iViation will establish an Aviation Academy in Wuhan and provide consulting services for Chinese-German aviation projects.
Das Schwäbische Tagblatt widmet einen Artikel dem Flugsimulator, der seit einigen Monaten unsere Räumlichkeiten bereichert.
Bild: Dunja Bernhard, Schwäbisches Tagblatt
In dem Beitrag “Einmal Flugkapitän sein” vom 28.12.2018 schreibt die Autorin Dunja Bernhard:
“In der Rottenburger Gartenstraße startet und landet täglich eine Boeing 777. Zumindest im Flug-Simulator. Wer an dem Bürogebäude mit der Hausnummer 82 vorbeigeht, ahnt nicht, dass sich dort ein solches Hightechgerät befindet, in einem etwa 20 Quadratmeter großen Zimmer.
Der Simulator gehört dem Airbus-Piloten Hannes Braitmaier. Bis zum vergangenen August stand das 180 000 Euro teure Gerät in Sielmingen auf den Fildern. Dann fand Braitmaier den neuen Standort in Rottenburg, bei Volker Kassera, dem Geschäftsführer von CFD Consulting [sic!]. Das Unternehmen bietet Problemlösungen bei strömungstechnischen Fragestellungen.”
Weiter heißt es:
“angehende Verkehrspiloten können mit dem Simulator für das Vorfliegen bei der Bewerbung üben. Rund 500 Stunden im Jahr ist die detailgetreue Cockpit-Nachbildung in Betrieb. Braitmaier möchte die Räume an der Gartenstraße zu einem Treffpunkt für Flugbegeisterte machen. Besonders unter Jugendlichen will er die Begeisterung für die Fliegerei wecken. Denn: „Dem Flugsport fehlt der Nachwuchs.“”
Quelle und kompletter Artikel: Schwäbisches Tagblatt
6 wind turbines are to be erected near a public airfield. The planned locations of the wind turbines are close to the airfield traffic pattern. For three typical aircrafts operated at the airfield and flying a traffic pattern, potential hazards were determined by entering the wind shear zones of the wind turbines. As a basis for the assumed operating parameters of the aircraft, procedures published in the certified flight manuals (AFM) are assumed. In addition, a sensitivity analysis is performed for deviations from the specified flight parameters and traffic pattern. Numerical flow simulations (virtual wind tunnel) are carried out in order to take into account the local flow conditions (up and down winds). In addition to the flow calculations, a flight simulation of the traffic pattern is realized for an aircraft (soon to be seen on YouTube).
Computing the drag forces of sleek bodies like aircraft wings properly is still a challenge for CFD models, because the friction forces are significant and they depend strongly on the innermost part of the boundary layer, the so called viscous sublayer. In case of low Reynolds numbers the physics in the sublayer is dominated additionally by the transition from laminar to turbulent flow. This transition occurs not a certain point, but in a transition zone, where even flow separation and backflow appear in the boundary layer – the so called laminar transition bubble. This must not be confused with large scale flow separation as a re-attachment happens and the main flow is not separated. Neglecting these physical phenomena in CFD models leads to drag forces, which can be wrong by a factor of more than two. For proper modeling a very high grid density is needed as well as the most modern turbulence models, which allow the prediction of the laminar-turbulent transition.
In the example shown, CFD Consultants modeled the wing of a slow flying stratospheric aircraft (Elektra Two Solar by Elektra Solar GmbH, Landsberg am Lech, Germany) featuring a grid with 0.5*109 grid cells. The simulation was performed on one of the world’s fastest super computers. For visualization FieldView was used.
