Daniel König Book order

As linguistic systems comprising a large variety of written and oral registers including derivate “languages” and “dialects,” Latin and Arabic have been of paramount importance for the history of the Euromediterranean since Antiquity. Moreover, due to their long-term function as languages of administration, intellectual activity, and religion, they are often regarded as cultural markers of Europe and the (Arabic-)Islamic sphere respectively. This volume explores the many dimensions and ramifications of Latin-Arabic entanglement both from macro-historical as well as from micro-historical perspectives. Visions of history marked by the binary opposition of “Islam” and “the West” tend to ignore these important facets of Euromediterranean entanglement, as do historical studies that explain complex transcultural processes without giving attention to their linguistic dimension.

Noise generated by high-lift devices is an essential part of the emitted sound of an airplane especially during approach when the engines run almost in idle conditions. The sound spectra are characterized by a mix of tonal and broadband components which are originated by the turbulent flow field, i. e., the noise generation is dominated by vortex-vortex and vortexwall interaction. Therefore, in the present study the turbulent flow field over a slat-main wing configuration is investigated by a large-eddy simulation (LES) and subsequently, the obtained unsteady flow data is used to analyze the acoustic field based on the acoustic perturbation equations (APE). The computations are performed at a freestream MACH number of Ma=0.16 at an angle of attack of 13 deg. The REYNOLDS number which is based on the clean chord length and the freestream velocity is Re= 1.4x10 6 . It is shown that a pure LES is not suitable for industrial applications when high REYNOLDS numbers are considered due to the vast required computational effort. Therefore, in the present work a zonal method is developed and implemented which combines the Ravsorns-averaged NAVIER-STOKES (RANS) equations and the spatially filtered NAVIER-STOKES equations solved in a large-eddy simulation, i. e., in regions where unsteady turbulent flow data is required an LES is performed whereas the remaining flow field regions are computed by a RANS simulation which is in terms of computational effort more efficient than an LES. First, the zonal RANS/LES method is validated by turbulent channel flow simulations and, second, it is applied to the slat-main wing configuration.