An experimental study was conducted to characterize the dynamic wind loads and evolution of the unsteady vortex and turbulent flow structures in the near wake of a horizontal axis wind turbine model placed in an atmospheric boundary layer wind tunnel. In addition to measuring dynamic wind loads (i.e., aerodynamic forces and bending moments) acting on the wind turbine model by using a high-sensi...

A gas turbine engine's ability to relight in flight depends heavily on the combustion chamber's inlet conditions. These conditions are dictated by core compression system located immediately upstream of combustor, but such during windmill have not been thoroughly investigated and commonly available literature. In this paper, an entire high pressure ratio axial compressor is modeled using scale ...

Unsteady wake-blade interaction is an inevitable consequence of the relative motion between rotors and stators in turbomachines. The flow in a low-pressure stage has a relatively low Reynolds number, of order 10 5 , based on chord length, and a substantial proportion of the boundary layer on the blade surface is thus laminar or transitional. While the flow in a turbine accelerates, globally, th...

In this paper, a novel fiber turbine flow sensor was proposed and demonstrated for liquid measurement with optical fiber, using light intensity modulation to measure the turbine rotational speed for converting to flow rate. The double-circle-coaxial (DCC) fiber probe was introduced in frequency measurement for the first time. Through the divided ratio of two rings light intensity, the interfere...

Abstract State-of-the-art technologies for wind and tidal energy exploitation focus mostly on axial turbines. However, cross-flow hydrokinetic turbines possess interesting features, such as higher area-based power density in array installations shallow water, well a generally simpler design. Up to now, the highly unsteady flow conditions cyclic blade stall have hindered deployment at large scal...

For the purpose of further improving power generation performance by supercritical CO2 gas turbine system, aerodynamic optimum and heat transfer flow analysis were carried out for vertical single-axial bypass control type system model in 0.6 GW class FFHR-b1 nuclear fusion reactor model. As a result, following conclusions obtained.

Numerical simulations of complex large-scale flow systems must capture a variety of physical phenomena in order to predict the flow accurately. Currently, many flow solvers are specialized to simulate one part of a flow system effectively, but are either inadequate or too expensive to be applied to a generic problem. As an example, the flow through a gas turbine can be considered. In the compre...