Mitigation of tip vortex cavitation by means of air injection on a Kaplan turbine scale model

Rivetti, Arturo; Angulo, Mauricio Abel; Lucino, Cecilia Verónica; Liscia, Sergio Oscar

doi:10.1088/1755-1315/22/5/052024

Cited by 13 publications

(2 citation statements)

References 2 publications

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“…The demodulation technique described by Escaler et al [10] is adopted to process the fluid and structure-borne. This technique has proven to be successful in diagnosing other manifestations of cavitation [7], [11]. A simplified scheme of required processing is shown in Figure 4.…”

Section: Frequency Domainmentioning

confidence: 99%

Hydrodinamic Behavior on Kaplan Turbines: Experimental Methodology for the Evaluation of Cavitation Development Based on Dynamic Measurements

Rivetti¹,

Angulo²,

Lucino³

et al. 2018

AJHWES

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EditorialDemand for electricity is increasing rapidly in Latin America. Expanding and enhancing the current power generation infrastructure is thus a major concern for the region. In that context, renewable energy is bound to play a relevant role in the coming years and hydroelectric energy especially so in view of its relatively unexploited potential, which is estimated in around 690,000 MW in the region.Our mission is to contribute to the regional integration by means of the production of knowledge in the field of hydroelectric power generation and hydromechanical systems, with focus on technological advance and the rise of quality standards, but with an eye on the priorities of a region where, well into the XXI century, millions of people find themselves deprived of electricity. That includes the topics such as the evaluation of the development of projects of low environmental impact, the role of hydroelectric powerplants in the face of the diversification of the energy matrix as well as mini-and small-hydro projects to meet the demand of areas with no access to the electrical network.Three symposia have been held and six editions of this Journal have been published since the creation of this, the Latin Group, in 2012. Added to that are postgraduate courses and exchange programs that are being organized at present. Mexico, Brazil, Ecuador, Colombia, Uruguay and Argentina are the most active members of the Group and it is our goal to get more involved in the future.We firmly believe in the ability of our universities to conduct the research in the field of hydraulic turbomachinery and that this knowledge will have a beneficial impact on the policy making of our countries, whether on matters related to existing infrastructure as well as the development of longterm projects and strategies.We understand that keeping and strengthening the link between the nations currently participating is a major challenge in the framework of a constantly evolving reality, seen reflected in the availability of economic resources, the technological tools and the swings of institutional management. May this new edition of the Journal serve as evidence that, however difficult, such challenge is achievable.Eng. Sergio O. Liscia Presidente Latin Group 2017-2021

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Section: Frequency Domainmentioning

confidence: 99%

Hydrodinamic Behavior on Kaplan Turbines: Experimental Methodology for the Evaluation of Cavitation Development Based on Dynamic Measurements

Rivetti¹,

Angulo²,

Lucino³

et al. 2018

AJHWES

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“…In active control approaches, the tip vortex flow is altered by injection of a solution, e.g. air [22], polymer [23,24], or water [25,26], into the tip vortex region. In passive control methods, the boundary layer and momentum distribution around the blade tip are altered aiming to weaken the tip vortex and its nuclei capture capability.…”

Section: Introductionmentioning

confidence: 99%

Propeller Tip Vortex Mitigation By Roughness Application

Asnaghi¹,

Svennberg²,

Gustafsson³

et al. 2020

Preprint

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In this study, the application of surface roughness on model and full scale marine propellers in order to mitigate tip vortex cavitation is evaluated. To model the turbulence, SST k − ω model along with a curvature correction is employed to simulate the flow on an appropriate grid resolution for tip vortex propagation, at least 32 cells per vortex diameter according to our previous guidelines. The effect of roughness is modelled by modified wall functions.The analysis focuses on two types of vortices appearing on marine propellers: tip vortices developing in lower advance ratio numbers and leading edge tip vortices developing in higher advance ratio numbers. It is shown that as the origin and formation of these two types of vortices differ, different roughness patterns are needed to mitigate them with respect to performance degradation of propeller performance. Our findings clarify that the combination of having roughness on the blade tip and a limited area on the leading edge is the optimum roughness pattern where a reasonable balance between tip vortex cavitation mitigation and performance degradation can be achieved. This pattern in model scale condition leads to an average TVC mitigation of 37% with an average performance degradation of 1.8% while in full scale condition an average TVC mitigation of 22% and performance degradation of 1.4% are obtained.

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The Cause and Control of Failure of Hydraulic Turbine Due to Cavitation: A Review

Kamal

Abbas²,

Kumar³

et al. 2021

Springer Proceedings in Energy

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Mitigation of tip vortex cavitation by means of air injection on a Kaplan turbine scale model

Cited by 13 publications

References 2 publications

Hydrodinamic Behavior on Kaplan Turbines: Experimental Methodology for the Evaluation of Cavitation Development Based on Dynamic Measurements

Hydrodinamic Behavior on Kaplan Turbines: Experimental Methodology for the Evaluation of Cavitation Development Based on Dynamic Measurements

Propeller Tip Vortex Mitigation By Roughness Application

The Cause and Control of Failure of Hydraulic Turbine Due to Cavitation: A Review

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