Accurate models for the prediction of ship airwake flowfields are critical to the development of realistic flight simulation tools for aircraft carrier launch and recovery operations. The accurate computation of the ship airwake can be very challenging due to the complexity of the ship geometry, the size of and difficulty in generating a suitable computational mesh, and the large range of length and time scales present in the unsteady flowfield. The present paper investigates the sensitivity of the airwake solution to several modeling parameters, including geometric complexity and the resolution of boundary layers, with the aim of determining the level of fidelity required to obtain an accurate solution. Results are compared to wind tunnel experimental measurements. The results of these studies show that, in general, a majority of the airwake flow features are characterized by bluff body shedding from the larger geometric entities that comprise the ship geometry. Depending on the requirements and intended use of the solution, a certain tradeoff can be reached between solution turn-around/grid generation time and solution accuracy.
Ship Airwake Sensitivities to Modeling Parameters
2005
15 pages
Report
Keine Angabe
Englisch
Fluid Mechanics , Marine Engineering , Meetings , Naval vessels , Models , Flow fields , Wake , Parameters , Sensitivity , Boundary layers , Computational fluid dynamics , Symposia , Unsteady flow , Flight simulation , Aircraft carriers , Predictions , Wind tunnel tests , Geometry , Ship airwake sensitivities , Ship geometry , Cfd(Computational fluid dynamics) , Wod(Wind-over-deck) , Sbir(Small business innovation research) , Sbir reports , Sbir phase 2
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