Log in to use our free company, program and sector update tracker feature.

April 2008 edition

Validation of k-kL-&omega model for low-Reynolds number airfoil

By D. Rival, K. Aschmoneit and C. Tropea of the Institute of Fluid Mechanics and Aerodynamics, Darmstadt University of Technology, 64287 Darmstadt, Germany.

This article has been edited from a paper presented to the International Aerospace CFD Conference in Paris.

Simulations using the k-kL-&omega turbulence model for an SD7003 low-Reynolds-number airfoil have been performed and compared with a variety of experimental data available in the open literature. This three-equation RANS model is currently offered as a beta-test model in FLUENT 6.3, providing a means of capturing boundary-layer transition using a single-point approach, that is without the need for an external linear-stability solver to predict transition. The k-&omega SST (low-Reynolds number correction) turbulence model has also been tested for its accuracy at these low-Reynolds numbers. All test cases were performed at Re=60k, where a long and stable laminar separation bubble is known to exist over a large range of angles of attack. Simulations for three free-stream turbulence intensities (Tu=0.1%, 0.5% and 1.0%) were examined, representing 'mixed' transition, a state where both natural and bypass transition play a role. It is found that the separation and transition points are well-predicted, but that further development of turbulence downstream is too slow. Consequently, the reattachment point is predicted to be further downstream in comparison with the PIV measurements made in both wind and water....

Full report (2159 words) is available by subscription:  

Tell a friend/colleague about this story:


Subscribers are able to access the full text of articles on this web site, and in a downloadable PDF newsletter. If you have a subscription already then please log in, otherwise see our latest subscription offers.

Enhanced listings:

Reduce the time spent on current projects by using ESDU – engineering data and software that have been approved and endorsed by professional institutions.

General Plastics Manufacturing Co.
GP has been supplying OEMs, Tier 1 & 2 companies with flame-retardant foam core materials and custom flexible foam molded parts for aircraft flight decks and interior cabins for over 50 years.

United Performance Metals
A global distributor and processor of titanium products for over 40 years, and a leading supplier to the aerospace industry.

USA Borescopes
USA Borescopes is a global supplier of world class visual inspection equipment. We are the one stop source for aviation professionals.

The world's leading provider of thermal processing services to aerospace primes and their supply chains.

See our advertising tariff.


data pages remaining in monthly quota for non-subscribers

© Copyright of Airframer Limited, operated under licence by Stansted News Limited 2017. Terms & Conditions of reading.