{'fraction_non_alphanumeric': 0.013071895424836602, 'fraction_numerical': 0.0, 'mean_word_length': 5.337931034482758, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Numerical Simulation of Frigate Airwakes

The airwake surrounding the flight deck of a frigate is analysed to better understand the flow field that a helicopter pilot will encounter when operating from this maritime platform. This is a first step in studying the fully coupled helicopter/ship airwake environment. The flow around a simplified scale model of a Canadian patrol frigate is measured experimentally and simulated numerically. The computations were carried out using the structured multi-block flow solver CFD-ACE employing the k-ε turbulence model with wall functions. Comparison of experimental and computed velocity and turbulent kinetic energy profiles shows that the simulation captures the flow structures but contains higher spatial gradients. This difference can be partially attributed to the unsteadiness of the flow in the airwake with which a steady-state Navier–Stokes solver will have trouble.