the purpose of this study is to improve the aerodynamic performance of wind turbine blades, using the ball-spine inverse design method. the inverse design goal is to calculate a geometry corresponds to a given pressure distribution on its boundaries. by calculating the difference between the current and target pressure distributions, geometric boundaries are modified so that the pressure differ...

The problem of efficient gas lift for well annulus packers that rely on their own energy plungers is considered. complex related gas-liquid addressed in the frame model where inflow dynamics and liquid considered shale wells are weakly coupled. On this basis, with aiding support indoor simulation experimental data, a new plunger design taking into account leakage obtained. Finally, dedicated so...

Abstract: The present paper introduces a control oriented model based on air and burned gas flows for automotive engines with variable valves. Moreover, a predictive controller is proposed by using the obtained model. For the engines with variable valves, the intake valve lift enables the quick torque response; on the other hand, the large valves’ overlap may cause a misfiring of combustion bec...

The gas lift in the offshore M field will be performed with high CO2-content associated gas, but change of wellbore temperature and pressure during injection process lead to phase physical parameters which has a great impact on design lift. To ensure smooth implementation field, this paper conducts study considering CO2 state. We obtained density, viscosity, compression factor, constant specifi...

An optimization procedure aimed at the design of multicomponent airfoils for high-lift applications is described. The procedure is based on a multiobjective genetic algorithm; two #ow solvers have been coupled with the genetic algorithm: a viscous}inviscid interaction method, based on an Euler #ow solver and an integral boundary layer routine, and a method based on a full potential #ow solver. ...

The microflora developing during a continuous enrichment culture from a hydrothermal chimney sample was investigated by molecular methods. The culture was performed in a gas-lift bioreactor under anaerobic conditions, at 90°C and pH 6.5, on a complex medium containing sulfur as the terminal electron acceptor. Archaeal and bacterial diversity was studied. Microorganisms affiliated with the gener...

The traditional optimum modes of gas-lift production are usually established by taking the injected gas rate as a decision variable and maximum oil objective function. After solving model, rates single wells obtained, then productions wells, total well groups economic profit can be obtained. However, models do not take both different types performance curves (GLPCs) cost factors technique into ...