Einmal Flugkapitän sein

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

High Performance Computing: Hawk to replace Hazel Hen at HLRS

The High Performance Computing Center (HLRS) of the University of Stuttgart announces in a press release the construction of the world’s fastest supercomputer for industrial production. The new supercomputer Hawk is being built in cooperation with the market leader Hewlett Packard Enterprise (HPE) and, with a theoretical peak performance of 24 petaFLOPS, will be about 3.5 times faster than the current supercomputer Hazel Hen.

CFD Consultants GmbH will thus be able to carry out flow simulations with several 100 million grid cells in a very short computing time for the development processes of our customers.

Press release HLRS

News message HLRS

Workshop “Development of CFD-Calculation Models”

CFD Consultants GmbH has been developing CFD calculation models for more than 20 years. With these models we simulate and analyze flow processes and related phenomena across all industries. Profit from this experience!

Gain insight into our procedures, into the potentials and limits of CFD methodology as well as into the latest developments in this field. On 12.12.2018 we will be holding the

Workshop “Development of CFD Simulation Models”

The cost is EUR 350,00 per person, the number of participants is limited to eight. The registration takes place informally by email to cfd@cfdconsultants.de until 03.12.2018 at the latest, agenda and details can be seen in our Flyer.

Please note: A professional flight simulator is available on our premises. After the workshop there is the possibility to take a “trial flight” and dive into the world of commercial aviation!

We are looking forward to your registrations, with best regards

Volker Kassera

Flow conditions and wind shear in the wake of wind turbines. A case study.

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).

Accurate Drag Prediction – Revealing Boundary Layer Secrets with a High Fidelity CFD Model

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.