Abstract An important environmental issue facing the marine and hydrokinetic energy industry is whether fish that encounter underwater devices are likely to be struck injured by moving components, primarily rotating turbine blades. The automated analysis of nearly 3 weeks multibeam hydroacoustics data identified about 35,000 tracks passing a tidal in East River, New York. These included both individual schools during periods with absent, present operating, but not operating. density sampled...

Tidal energy has received increasing attention over the past decade. This focus on capturing from tidal currents brought about development of many designs for current turbines. Several these turbines are progressing rapidly design to prototype and pre-commercial stages. As systems near commercial development, it becomes increasingly important that their performance be validated through laboratory tests (e.g., towing tank tests) sea tests. different turbine configurations have been tested...

Marine hydrokinetic (MHK) power generation systems enable harvesting energy from waterways without the need for water impoundment. A major research challenge numerical simulations of field-scale MHK farms stems large disparity in scales between size waterway and device. We propose a large-eddy simulation (LES) framework to perform high-fidelity, multi-resolution arrays real-life marine environment using novel unstructured Cartesian flow solver coupled with sharp-interface immersed boundary...

An experimental study of a single, swirl cup burner is carried out to improve understanding the lean reacting flow field near idle conditions for an annular spray combustor. The counter-swirler mounted horizontally in trapezoidal cross-section combustor with quartz plate walls. Liquid fuel, Jet-A, initially atomized using simplex nozzle, and then designed re-atomization occurs from swirler hardware. Measurements non-reacting gas phase velocities enable direct comparison critical features at...

Abstract The International Energy Agency Ocean Systems (IEA-OES) has identified a target installed capacity worldwide of 300 GW by 2050 [1]. Verdant Power is advancing the Marine Renewable (MRE) industry towards commercial tidal energy and MW-scale array projects through development scalable mount that integrates life-cycle operation maintenance (O&M) with an environmentally compatible turbine. Kinetic Hydropower System (KHPS) 5th generation water-to-wire MRE system utilizes...

Improvements in the thrust to weight ratio of future high performance air breathing combustion systems require operation at higher combustor temperatures and pressures prompting need for increased understanding effects thermal conditions on fuel combustion. The use larger operating ranges requires extended injection up transcritical supercritical thermodynamic states. This paper describes an experimental study effect temperature characteristics using nGimat’s proprietary injector a...

To adhere to the current requirements for NOx emissions in combustion systems, modern land and air based gas turbine engines often operate lean regime. While operating near blowout limit does reduce harmful emissions, combustor stability is sacrificed extinction becomes a major concern. understand characteristics of operation, an experimental study was conducted map time averaged flow field typical industrial, counter-swirling, liquid fuel combustor. 2-D mean velocities Reynolds stresses...

Pelagic Sargassum macroalgae entrained in the Gulf Stream serves as habitat for commercially and recreationally important fish protected sea turtles, among other organisms. It also plays an role sourcing of carbon, nitrogen, phosphorus to otherwise deficient oligotrophic pelagic waters Atlantic Ocean. is seasonally concentrated along western wall off coast North Carolina. The a fast constant boundary current that consistently comes close proximity land Cape Hatteras, This area thus interest...

For FOWTs, complex models are used that integrate the loading from wind, waves and current in combination with structural dynamics controls of system.These build off competency other fields such as land-based wind offshore oil gas industry but unique their application requirements.The complexity uniqueness these elevates need for ensuring validity supporting design optimization FOWTs.Relevant developments ongoing efforts to support numerical modelling FOWTs within IEC TC 88 [1], Wind energy...

Along with a market-competitive levelized cost of energy, current energy converter technology strongly benefits from an extensive consideration socioeconomic, environmental, and regulatory factors early in the design process. As part performance level assessment, series assessment questions guidance are developed presented to evaluate early-stage on holistic criteria considering entire device lifecycle. The represents accumulation industry research experience date relies regular updates...