Wind Turbines

Dixon, Simon

doi:10.1016/b978-0-12-415954-9.00010-3

Cited by 39 publications

(76 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Solutions in the previous section reveal that gears rotating in a fluid present similarities with centrifugal streamlines as indicated by the volumetric flow rate evolution with rotational speed. It seems therefore interesting to explore the possibility of an analytical approach to WPL using some well-known results in turbomachinery analysis [14].…”

Section: Windage Power Lossesmentioning

confidence: 99%

See 1 more Smart Citation

A windage power loss model based on CFD study about the volumetric flow rate expelled by spur gears

Pallas

Marchesse

Changenet

et al. 2012

Mechanics & Industry

View full text Add to dashboard Cite

This paper investigates the windage power losses generated by spur gears rotating in pure air by using a computational fluid dynamics (CFD) code. The three-dimensional simulations are at first validated comparing CFD predictions with the power losses measured in similar conditions from other investigations. The volumetric flow rate which is expelled by the teeth is then analysed, and a correlation which is based on a classical approach used in turbomachinery is finally proposed which makes it possible to estimate windage losses for spur gears. It was observed that this latter approach seems satisfying since the formulation of the volumetric flow rate which is employed in the model is appropriate to each gear.

show abstract

Section: Windage Power Lossesmentioning

confidence: 99%

“…Alternatively, the absolute velocity can also be split into the sum of a radial (V r = velocity of flow) and tangential component (V u = velocity of whirl). For a gear running with angular velocity Ω, the specific work generated on the fluid (work per unit of mass) is given by [14]:…”

Section: Windage Power Lossesmentioning

confidence: 99%

A windage power loss model based on CFD study about the volumetric flow rate expelled by spur gears

Pallas

Marchesse

Changenet

et al. 2012

Mechanics & Industry

View full text Add to dashboard Cite

show abstract

“…The TIT deviations measured in both engines while using R343, R444 and R615 are not so high and present no risks on the RIT, knowing that nowadays materials used in RIT's rotors can support a TIT around 1300 K. 51 The same comparison is performed for engine I and II in terms of P cyl as shown in Figure 8(g) and (h). Findings show that all proposed TCs generate a P cyl under the original ones at all engine speed ranges, which ensure a good engine's strength against thermal stress.…”

Section: Resultsmentioning

confidence: 90%

“…Finally, the works of Bourabia e al. 18 and Dixon and Hall 51 are judged sufficient to be used as TC losses models in the present paper.…”

Section: Turbocharger Preliminary Designmentioning

confidence: 99%

An approach to select an appropriate turbocharger for matching with an internal combustion engine

Hameur

Sehili

Cerdoun

et al. 2022

International Journal of Engine Research

View full text Add to dashboard Cite

The present paper proposes a novel methodology of turbocharging automotive engines to reach targeted performance. The actual method is tested and validated against simulation test results of two turbocharged diesel engines; engine I, three cylinders, 1.5 L, and engine II, six cylinders, 5.9 L. The present procedure is subdivided into four key parts; namely, database construction, selection procedure, turbocharger preliminary design, and engine modeling. Based on geometric dimensions and aerodynamic parameters provided by the preliminary design procedure, 3D geometries of the turbine and compressor are generated for each studied engine. After integrating previous data into a constructed turbocharger database, two turbochargers are selected for the engine I, while only one turbocharger for the engine II. The findings show that, at the engine speed of 4000 rpm, engine I matched with the adequate turbocharger reached a target power about 2.7%, compared to the original turbocharger equipping engine I. Furthermore, engine II reached a rated power of 299.3 kW at 2500 rpm which is slightly under the original one by 2.64 kW. The superimposition of the engine operating area on compressor and turbine maps provided satisfactory results in terms of turbocharger-engine output performance, fuel consumption, secure functioning and engine thermal strength. Finally, the main advantage of the developed methodology consists of its ability to be applied at both earlier and last stages of the engine turbocharging process or to find new adequate turbochargers to replace the original one for economic, mechanical or for safety reasons.

show abstract

“…Wind energy is one of the fastest rising segments of renewable energy and is considered the second most important type of renewable energy after hydropower [2]. Wind energy is produced using turbines, offshore and onshore, which usually produce some noise but by improvements in the design, the noise level has noticeably dropped [3]. Betz's law estimates, from the conservation analysis of mass and momentum in the fluid flow through the turbine, the highest efficiency that can be obtained from a wind turbine is by decreasing the speed of air by 59.3%.…”

Section: Introduction 11 Backgroundmentioning

confidence: 99%

Computational And Experimental Investigation of Lotus-Inspired Horizontal-Axis Wind Turbine Blade

Abdelrahman¹,

Mahmoud²,

Abdelfattah³

et al. 2021

ARFMTS

View full text Add to dashboard Cite

In the firm belief that the world needs green, renewable and more efficient energy resources, the present paper is concerned with developing a new design for horizontal-axis wind-turbine (HAWT) blades. The flower of Nelumbo nucifera (Sacred Lotus) was the motive for the present design of a three-blade wind turbine. Nelumbo Nucifera flower has an aerodynamically appropriate structure, which qualifies the flower to be the nature-inspiration for the present research. A computational fluid dynamics (CFD) simulation was applied in order to ensure the ability and eligibility of the proposed solution and estimate real world's results. The performance of the blade airfoil can be improved by applying the Lotus flower's structural design and modifying the blade straightening. The experimental findings demonstrated performance enhancement by 31.7% compared to NACA 2412 airfoil.

show abstract

Wind Turbines

Cited by 39 publications

References 15 publications

A windage power loss model based on CFD study about the volumetric flow rate expelled by spur gears

A windage power loss model based on CFD study about the volumetric flow rate expelled by spur gears

An approach to select an appropriate turbocharger for matching with an internal combustion engine

Computational And Experimental Investigation of Lotus-Inspired Horizontal-Axis Wind Turbine Blade

Contact Info

Product

Resources

About