Design and Analysis of Wind Turbine Blades: Winglet, Tubercle, and Slotted

Gupta, Alka; Al-Sultan, Ali Ibrahim; Amano, Ryoichi S.; Kumar, Sourabh; Welsh, Andrew

doi:10.1115/gt2013-95973

Cited by 16 publications

(3 citation statements)

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“…It was observed that the tubercled blades exhibited a power increase of 16-30% at wind speeds between 2 and 6.5 m per second. Additionally, Gupta et al noted that tubercled blades outperformed their straight counterparts by sustaining power generation even during stall conditions [150]. In their study, Abate et al demonstrated that the strategic placement of tubercles, spanning from 95% of the blade's span to the tip, resulted in a calculated 10% rise in annual energy production at a wind speed of 10 m/s [151].…”

Section: Humpback Whalesmentioning

confidence: 99%

Nature-Inspired Designs in Wind Energy: A Review

Omidvarnia,

Sarhadi

2024

Biomimetics

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The field of wind energy stands at the forefront of sustainable and renewable energy solutions, playing a pivotal role in mitigating environmental concerns and addressing global energy demands. For many years, the convergence of nature-inspired solutions and wind energy has emerged as a promising avenue for advancing the efficiency and sustainability of wind energy systems. While several research endeavors have explored biomimetic principles in the context of wind turbine design and optimization, a comprehensive review encompassing this interdisciplinary field is notably absent. This review paper seeks to rectify this gap by cataloging and analyzing the multifaceted body of research that has harnessed biomimetic approaches within the realm of wind energy technology. By conducting an extensive survey of the existing literature, we consolidate and scrutinize the insights garnered from diverse biomimetic strategies into design and optimization in the wind energy domain.

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Section: Humpback Whalesmentioning

confidence: 99%

Nature-Inspired Designs in Wind Energy: A Review

Omidvarnia,

Sarhadi

2024

Biomimetics

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“…These methods are useful for improving the performance of low-specific speed centrifugal pumps, but the former will reduce the range of pumps' flow rates, while the latter will increase the pumps' maximum shaft power. Therefore, some scholars, based on the application of blade slit in the compressor field [13][14][15], began to try the blade slit structure within the low specific speed centrifugal pump. Zhu et al [16] developed an impeller for a slit-flow centrifugal pump and found that the impeller could indeed improve the performance of the pump and broaden its operating range.…”

Section: Introductionmentioning

confidence: 99%

Optimal Design of Slit Impeller for Low Specific Speed Centrifugal Pump Based on Orthogonal Test

Yang

Zhou

Zhou³

et al. 2021

JMSE

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Marine centrifugal pumps are mostly used on board ship, for transferring liquid from one point to another. Based on the combination of orthogonal testing and numerical simulation, this paper optimizes the structure of a drainage trough for a typical low-specific speed centrifugal pump, determines the priority of the various geometric factors of the drainage trough on the pump performance, and obtains the optimal impeller drainage trough scheme. The influence of drainage tank structure on the internal flow of a low-specific speed centrifugal pump is also analyzed. First, based on the experimental validation of the initial model, it is determined that the numerical simulation method used in this paper is highly accurate in predicting the performance of low-specific speed centrifugal pumps. Secondly, based on the three factors and four levels of the impeller drainage trough in the orthogonal test, the orthogonal test plan is determined and the orthogonal test results are analyzed. This work found that slit diameter and slit width have a large impact on the performance of low-specific speed centrifugal pumps, while long and short vane lap lengths have less impact. Finally, we compared the internal flow distribution between the initial model and the optimized model, and found that the slit structure could effectively reduce the pressure difference between the suction side and the pressure side of the blade. By weakening the large-scale vortex in the flow path and reducing the hydraulic losses, the drainage trough impellers obtained based on orthogonal tests can significantly improve the hydraulic efficiency of low-specific speed centrifugal pumps.

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“…Culley et al [17] conducted a systematic study on the compressor blade gap drainage scheme through numerical calculation methods and the research showed that different gap positions would have different effects on compressor performance. Gupta et al [18] conducted a multi-scheme gap drainage study on turbomachinery and found that gap drainage could improve its performance and reduce its start-up power. As a blade machine, the working principle of the centrifugal pump has many similarities with the above-mentioned rotating machines.…”

Section: Introductionmentioning

confidence: 99%

Influence of Impeller Gap Drainage Width on the Performance of Low Specific Speed Centrifugal Pump

Wei

Yang

Zhou

et al. 2021

JMSE

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The centrifugal pump is one of the most important pieces of energy-consuming equipment in various hydraulic engineering applications. This paper takes a low specific speed centrifugal pump as the research object. Based on the research method combining numerical calculation and experimental verification, the influence of the gap drainage structure on the performance of the low specific speed centrifugal pump and its internal flow field distribution were investigated. The flow field inside the low specific speed centrifugal pump impeller under different gap widths was studied. The comparison between the numerical calculation results and the experimental results confirms that the numerical calculations in this paper have high accuracy. It was found that the gap drainage will reduce the head of the low specific speed centrifugal pump, but increase its hydraulic efficiency. Using a smaller gap width could greatly improve the performance of the low specific speed centrifugal pump on the basis of a slight reduction in the head. The high-pressure leakage flow at the gap flows from the blade pressure surface to the suction surface can effectively suppress the low-pressure area at the impeller inlet. The flow rate of the high-pressure leakage flow increases with the gap width. Excessive gap width may cause a low-pressure zone at the inlet of the previous flow passage. These results could serve as a reference for the subsequent gap design to further improve the operating stability of the low specific speed centrifugal pump.

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Design and Analysis of Wind Turbine Blades: Winglet, Tubercle, and Slotted

Cited by 16 publications

References 0 publications

Nature-Inspired Designs in Wind Energy: A Review

Nature-Inspired Designs in Wind Energy: A Review

Optimal Design of Slit Impeller for Low Specific Speed Centrifugal Pump Based on Orthogonal Test

Influence of Impeller Gap Drainage Width on the Performance of Low Specific Speed Centrifugal Pump

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