Numerical analysis of the porpoising motion of a blended wing body aircraft during ditching

Numerical Simulation and Experimental Study on the Aerodynamics of Propulsive Wing for a Novel Electric Vertical Take-Off and Landing Aircraft

“…Additionally, factors such as the number of blades in the fan and the duct's flow diffusion can induce flow separation and secondary flow. The Realizable k-ε model is employed to capture the complex turbulence [21,22], with the transport equations for k and ε as follows:…”

On applicability of von Karman's momentum theory in predicting the water entry load of V-shaped structures with varying initial velocity

“…Similar to the water landing scenarios of amphibian aircraft, ditching events of conventional aircrafts show the same fluid dynamics phenomena, and have been numerically studied widely. The effects of initial pitching angle and velocity (Xiao et al, 2021b;Guo et al, 2013;Qu et al, 2016;Zheng et al, 2021), fluid-structure interaction (Hughes et al, 2013;Yang et al, 2020), wave conditions (Woodgate et al, 2019;Xiao et al, 2021a) and various numerical strategies (Bisagni and Pigazzini, 2017;Siemann and Langrand, 2017;Xiao et al, 2017) on the kinematic characteristics and fluid dynamics phenomena have attracted most of the attention. The vertical acceleration, and its peak value in particular, is even more relevant than other kinematic characteristics as it may be responsible for possible comfort and safety problems occur on crew members, besides, of course, the effects in terms of structural integrity of the fuselage once it strikes the water (Neuberg and Drimer, 2017).…”