The optimal design problem is cast as a variational statement that minimizes the sum of induced and viscous power losses for a prescribed lift, propulsive force, and vehicle trim condition.
Such failures not only will influence on the proper propulsive performance, but also on the watertightness conditions, which is related to the risk of ship integrity loss.
This experimental study generates a new set of Nusselt number (Nu) data from two opposite upper and lower edges of a tilted reciprocating anti-gravity open tubular thermosyphon that emulates closely the realistic 'shaker-bored' cooling conditions inside a piston of marine propulsive diesel engine.
In this work we investigate the energy extraction by the system operating in irregular wave conditions and its performance concerning direct conversion to propulsive thrust.
In contrast to mammals, sauropods retained the primitive condition of the caudofemoralis musculature as the main propulsive muscle in locomotion (Gatesy, 1990).
This work demonstrates the importance of aerodynamically optimized designs to minimize detrimental effects on propulsive efficiencies, and provides estimate values of flow disturbances in realistic engine conditions that can be incorporated into simplified engine performance models.
It was confirmed that the behavior of SWUMANOID in the simulation was consistent with that in the experiment Fig. 12 Propulsive fluid forces acting on the hand, forearm, and foot for one stroke cycle in conditions 1 and 4. a Propulsive fluid forces acting on the right hand and forearm, b propulsive fluid forces acting on the right foot.
We determine the blade geometry, azimuthal blade pitch inputs, optimal shaft angle (rotor angle of attack), and division of propulsive and lifting forces among the components that minimize the total power for a given flight condition.
The blade geometry, azimuthal blade pitch inputs, optimal shaft angle (rotor angle of attack), and division of propulsive and lifting forces among the components that minimize the total power for a given flight condition are determined.
Therefore, design criteria should take into account also these operative conditions, in order to reduce the effects of propeller-wake interaction phenomena that degrade the overall propulsive efficiency, induce shaft/hull structural vibration and increase noise emission.
