The capability of Detached-Eddy Simulation (DES) to predict the separated flow around a helicopter fuselage is examined and discussed. Results from two European research projects are shown: Completed simulations using a structured solver for a simplified helicopter geometry and initial results with an unstructured solver for a more complex geometry. DES achieves encouraging agreement with experiments and an improvment over URANS in particular for the wake flow and surface pressure fluctuations. A strong dependency on the RANS model is seen, which is attributed in part to differences in the prediction of the sensitive separation from the smoothly-curved rear fuselage region. The grid design for the complex configuration is discussed and precursor RANS results are shown. Concerns regarding the treatment of multiple separation and reattachment by DES are expressed, which will be investigated further in future work.
Helicopter Fuselage Wake Prediction Using Detached-Eddy Simulation
2012
13 Seiten
Conference paper
English
Detached-Eddy Simulation of Separated Wake Flow Around Complex Helicopter Fuselage Configuration
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