An axial turbine in an innovative oscillating water column (OWC) device for sea-wave energy conversion

Hashem, Islam; Hameed, H.S. Abdel; Mohamed, Mohamed H.

doi:10.1016/j.oceaneng.2018.06.067

Cited by 35 publications

(8 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Simulations and experimentation of the turbines that have surfaced over the years such as when the axial flow turbines were compared with the cross flow turbines [11][12][13][14][15][16][17]. The axial flow turbine were influenced by a phenomenon which is instable and leads to a significant turbulent flow.…”

Section: Numerical Analysis Of Axial Flow Turbinementioning

confidence: 99%

The Numerical Simulation and Evaluation of Aircraft Engine Axial Flow Turbine using Numerical Techniques

al.¹

2019

IJMPERD

View full text Add to dashboard Cite

This research aims to improve the efficiency of an axial flow turbine by improving the boundary conditions. In the baseline paper, Sherwood number, Nusselts number for a given flow were determined. The pressure ratio was not considered in the paper. Research has been done to improve the values by considering the pressure difference which was neglected in the base line paper. Axial flow turbines expand the flow passing through it. Losses like tip losses, efficiency losses and loss on blades due to heat are high and needs to be looked after. A comprehensive literature study was carried out for the better understanding of axial flow turbines, recent developments and to analyze the control of loses.

show abstract

Section: Numerical Analysis Of Axial Flow Turbinementioning

confidence: 99%

The Numerical Simulation and Evaluation of Aircraft Engine Axial Flow Turbine using Numerical Techniques

al.¹

2019

IJMPERD

View full text Add to dashboard Cite

show abstract

“…Raghunathan [4] showed that a special power take-off device called "Wells turbine" which is an axial air turbine is a creative solution to this challenge. Once the incident wave reaches the OWC (figure 1 [5]), a highpressure area forms within the OWC chamber, forcing the inside air out. When the wave recedes, a lowpressure zone forms inside the chamber, and air from outside enters.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of through holes blades effect on wells turbine performance for wave energy conversion

Khalil

Kotb

Nawar

et al. 2022

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

The air Wells turbine is one of the most prevalent and promising wave energy harvesting systems. Wells turbine converts the reciprocating energy of the ocean and sea waves into mechanical energy. However, it is characterized by low performance, a narrow operating range, and low efficiency. In this article, the effect of a number of through holes that are distributed along the blade span was evaluated. Typically, the number of holes, diameter, and position from the trailing edge were subjected in this parametric study. The performance parameters of the turbine ( The torque coefficient, turbine efficiency, and stagnation pressure drop coefficient ) were numerically studied at various flow coefficient values to express the Wells turbine performance. The CFD results for a tested turbine model with a blade profile of NACA0015 and solidity of 0.644 were validated against published experimental data. It was found that a turbine blade with seven holes of 2%C in diameter and attached at a distance of 2%C from the trailing edge demonstrated the best performance characteristics. Furthermore, the new through holes blade increased the maximum value of torque coefficient by 1.16 compared to the conventional blade at a flow coefficient of 0.225.

show abstract

“…There are three main types of WECs: the overtopping devices, e.g. Wave Dragon [4], the oscillating water column (OWC), e.g. the Backward Bent Duct Buoy (BBDB) OWC [5][6][7] and U-OWC [8], and the oscillating-body devices, e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Wave Dragon [4], the oscillating water column (OWC), e.g. the Backward Bent Duct Buoy (BBDB) OWC [5][6][7] and U-OWC [8], and the oscillating-body devices, e.g. SEAREV [9], Pelamis [10] and Salter's Duck [11].…”

Section: Introductionmentioning

confidence: 99%

Dynamic performance of key components for hydraulic power take‐off of the wave energy converter

Chen

Wen

Yue

et al. 2019

IET Renewable Power Generation

View full text Add to dashboard Cite

Since the input power of the real waves varies continuously and periodically, how to stabilise the operation and generation during wave energy utilisation has become an inevitable and significant topic. This study focuses on the wave energy converter of a hydraulic power takeoff (HPTO) connected to a pendulum and studies the influences of the key components, i.e. the high-pressure accumulator, oil tank and flow control valve, on the operational stability of HPTO by simulations and experiments. Parameters of the high-pressure accumulator are analysed and optimised. The dynamic performance of the HPTO with or without the oil tank is also investigated. Besides, the functions of the flow control valve in the cases of excessive input power and load shedding are given. Results show that the key components play very important roles in the operational stability of HPTO. Reasonable configurations of the high-pressure accumulator and oil tank are significant to improve the quality of output power and stability. Appropriate actions of the flow control valve are beneficial to protection and stability. Therefore, these key components should be considered preferentially during the design of HPTO.

show abstract

An axial turbine in an innovative oscillating water column (OWC) device for sea-wave energy conversion

Cited by 35 publications

References 36 publications

The Numerical Simulation and Evaluation of Aircraft Engine Axial Flow Turbine using Numerical Techniques

The Numerical Simulation and Evaluation of Aircraft Engine Axial Flow Turbine using Numerical Techniques

Evaluation of through holes blades effect on wells turbine performance for wave energy conversion

Dynamic performance of key components for hydraulic power take‐off of the wave energy converter

Contact Info

Product

Resources

About