A5022718406- Biomimetic flight and propulsion mechanisms
- Fish Ecology and Management Studies
- Aerospace Engineering and Energy Systems
- Magnetic Bearings and Levitation Dynamics
- Reservoir Engineering and Simulation Methods
- Electromagnetic Launch and Propulsion Technology
- Bladed Disk Vibration Dynamics
- Paleontology and Evolutionary Biology
- Underwater Vehicles and Communication Systems
- Vehicle Noise and Vibration Control
- Fluid Dynamics and Turbulent Flows
- Fluid dynamics and aerodynamics studies
- Structural Health Monitoring Techniques
- Aerospace Engineering and Control Systems
Imperial College London
2023
University of Southampton
2017
The propulsive performance of a pair tandem flapping foils is sensitively dependent on the spacing and phasing between them. Large increases in thrust efficiency hind foil are possible, but mechanisms governing these enhancements remain largely unresolved. Two-dimensional numerical simulations single oscillating heave pitch at Reynolds number 7000 performed over broad dense parameter space, allowing effects inter-foil ( $S$ ) $\unicode[STIX]{x1D711}$ to be investigated range non-dimensional...
The extinct ocean-going plesiosaurs were unique within vertebrates because they used two flipper pairs identical in morphology for propulsion. Although fossils of these Mesozoic marine reptiles have been known more than centuries, the function and dynamics their tandem-flipper propulsion system has always unclear controversial. We address this question quantitatively first time study, reporting a series precisely controlled water tank experiments that use reconstructed plesiosaur flippers...
The aim of this article is to provide a theoretical basis upon which advance and deploy novel tandem flapping foil systems for efficient marine propulsion. We put forth three key insights into hydrodynamics related their choreography, propulsive efficiency, unsteady loading. In particular, we propose that the performance aft depends on new nondimensional number, s/Uτ, interfoil separation s normalized by distance freestream U advects in one period, τ. Additionally, show how loading can be...
Abstract One of the main challenges when designing aero engines is their high sensitivity to vibration, which can lead a loss performance, increased maintenance requirements and in worst case catastrophic failure engine. The Holistic Engine Rotor MEasurement System (HERMES) was designed installed Dynamics Lab at Imperial College London under EPSRC Prosperity Partnership - CORNERSTONE provide experimental insight into how fully assembled engine rotating conditions responds well-controlled...
Abstract Blade off events in an aero engine are one of the most critical failures, since they can lead to significant damage engine, and if not managed correctly, uncontained failure. During development programs detailed simulations conducted understand dynamic response bladed discs blisks operation, prevent blade events. However, do still occur on rare occasions it is be able detect manage them. Modelling validation such very time consuming expensive a test destructive test. To provide more...