This paper presents a study on the effect of wake modeling on the prediction of the off-axis response to pilot inputs for a hingeless and an articulated rotor helicopter, including a comparison with flight test data. The free wake model can capture geometry changes due to maneuvering flight. The prediction of the response to pilot inputs improves only slightly; in particular, the off-axis respo...

Wind farm parametrizations are nowadays commonly used to predict the output of wind farms in real-time numerical weather prediction mesoscale models. However, their accuracy both reproduce speed and turbulent kinetic energy fields behind turbines is a matter debate. Here, authors knowledge for first time single turbine, in-built parametrization Weather Research Forecasting model evaluated using...

In comparison to the terrains on planes, where wind follows a conventional profile. On interaction with raised terrain like hill or mountain, gets an added component of velocity in vertical direction. This gives air parcel couple moment, that causes twist. twisted wind, alters flow conditions, especially at pedestrian level, and demands investigation. The authors this research have developed se...

The actuator line technique was introduced as a numerical tool to be employed in combination with large eddy simulations to enable the study of wakes and wake interaction in wind farms. The technique is today largely used for studying basic features of wakes as well as for making performance predictions of wind farms. In this paper, we give a short introduction to the wake problem and the actua...

Passively mode-locked lasers with semiconductor saturable absorption mirrors are attractive comb sources due to their simplicity, excellent self-starting properties, and their environmental robustness. These lasers, however, can have an increased noise level and wake mode instabilities. Here, we investigate the wake mode dynamics in detail using a combination of evolutionary and dynamical metho...