Study of ice accretion along symmetric and asymmetric airfoils

Jin, Jia Yi; Virk, Muhammad Shakeel

doi:10.1016/j.jweia.2018.06.004

Cited by 38 publications

(25 citation statements)

References 9 publications

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“…Many researchers used icing wind tunnel tests or artificial ice molds to perform a large number of ice‐covered blade performance change experiments. Computational fluid dynamics (CFD) is a new technique that can play an important role in simulating wind blade experiments and provide economic details of flow physics that cannot be achieved in icing wind tunnels . Ferrer et al studied the performance of wind turbine rotors using their own 3D computational fluid dynamics model.…”

Section: Effect Of Icing On the Performance Of Wind Turbinesmentioning

confidence: 99%

“…Computational fluid dynamics (CFD) is a new technique that can play an important role in simulating wind blade experiments and provide economic details of flow physics that cannot be achieved in icing wind tunnels. 24 Ferrer et al 25 Virk et al and Etemaddar et al 21,27 used numerical methods for computational fluid dynamics to investigate the effects of ice on blade performance under different parameters.…”

Section: Effect Of Icing On the Performance Of Wind Turbinesmentioning

confidence: 99%

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A review on ice detection technology and ice elimination technology for wind turbine

et al. 2019

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Blade icing can affect wind turbines to generate electricity. In severe cases, 30% of power generation is lost in a year, and safety problems in the vicinity of wind power plants are also caused. Researchers have designed anti-icing and de-icing technologies to reduce these effects, and excellent ice-detecting devices are a prerequisite for using anti-icing and de-icing technologies. Ultrasonic attenuation technology can effectively and reliably detect the presence of ice without affecting the aerodynamic performance of the blade, providing a reliable guarantee for anti-icing and de-icing systems. Deicing and anti-icing systems are divided into active and passive, active heating blades are still the most effective anti-icing and de-icing methods, but their energy consumption is too high. Although there are many existing de-icing methods, there are not many practical uses. This article introduces them separately and lists their advantages and disadvantages. The use of ultrasonic anti-icing and de-icing is an economical and reliable means that has been proven to be used for anti-icing and de-icing of blades. However, under normal circumstances, a single anti-icing de-icing system cannot completely solve the problem of icing of the blades. This paper suggests using both ultrasonic and hydrophobic coatings to cope with more icing conditions. K E Y W O R D Santi-icing and deicing technology, fan blade, hydrophobic coating, ice detection technology, ultrasonic deicing | INTRODUCTIONWith the rapid development of the world economy, lots of countries are increasingly demanding energy resources. Owing to release a lot of greenhouse gases, chemicals and toxins substances from the combustion of the fossil fuels such as coal and oil, 1 People began to look for renewable energy to provide energy consumption, such as wind energy, 2-4 hydrogen energy, 5-7 solar energy, 8-10 biogas and biomass energy. 11-15 With the wind power growing rapidly, generate electricity by using wind turbines is economical and environmentally friendly. 16 As can be seen in Figure 1, China's total installed capacity of wind turbines in 2016 is much higher than in other countries.China has the largest wind power market in the country, and the installed capacity of wind power is growing steadily year by year. The high density of air is conducive to the development of wind energy resources in cold regions. Figure 2 shows wind resource changes in different seasons. The wind speed from June to August is significantly lower than other months. There are also data showing that wind resources in cold regions are 10% higher than other regions. 17,18

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Section: Effect Of Icing On the Performance Of Wind Turbinesmentioning

confidence: 99%

Section: Effect Of Icing On the Performance Of Wind Turbinesmentioning

confidence: 99%

A review on ice detection technology and ice elimination technology for wind turbine

et al. 2019

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“…where ρ a (kg/m 3 ) and ρ p (kg/m 3 ) are the air and snow particles density, respectively; D (m) is the diameter of the cables; d p (m) is the diameter of the snow particles; and μ (pa•s) is the dynamic viscosity of the medium environment, which is air in this study. Several investigations have been done on collision efficiency of different types of atmospheric icing on objects with different geometries such as cylinder [23][24][25][26], stranded power transmission lines [27], and airfoils [28,29]. Wakahama had studied trajectories of snow particles by photographing them when they were impinging to or rebouncing from a cylindrical surface [30].…”

Section: Eoretical Sectionmentioning

confidence: 99%

Experimental and Theoretical Studies of Wet Snow Accumulation on Inclined Cylindrical Surfaces

Mohammadian

Sarayloo

Abdelaal

et al. 2020

Modelling and Simulation in Engineering

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Wet snow accumulation on bridge cables and its shedding due to external phenomena such as rise in temperature, wind, and gravity is a serious threat to the safety of cars and pedestrians crossing the bridge. Commonly the accumulated snow on bridge cables is removed by external means such as mechanical removal or heat treatment which are expensive, time-consuming, and high-risk processes and are conducted based on little or no information available regarding the actual size and shape of the accumulated snow. In addition, cleaning of cables using the mechanical methods can potentially lead to erosion of cable materials when applied over years, resulting in enhanced surface roughness and potentially increased wet snow/ice accumulation during future precipitation events, and sometimes might require replacement of cable stays, which is an extremely costly and complicated task. Optimizing the number of mechanical cleaning procedures such as chain release through predicting the shape and thickness of the accumulated snow on the cable stays reduces the cost, time, and risk associated with the process. In this study, wet snow accumulation on torsionally rigid inclined cylinders of high-density polyethylene (HDPE) has been studied experimentally and numerically. A 2-D numerical model has been developed utilizing weather data to predict the thickness and the shape of the accumulated wet snow on inclined cylindrical surfaces. Outdoor experiments were also conducted to measure the density and thickness of accumulated snow, while monitoring the weather data real time. Overall, snow density was found to be linearly increasing with an increase in wind velocity, during snow precipitation. The maximum thickness and shape of the accumulated snow on cables obtained from the numerical model were found to be in good agreement with the outdoor experimental data. This work aims to provide a mean for prediction of snow accumulation on surfaces for optimizing the efficiency of the costly and high-risk snow removal procedures.

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“…The problem of icing on wind turbines was witnessed to be a major hindrance to the power production with a 20% to 50% decrease in the aerodynamic performance (Yirtici et al 2016), leading to reductions of up to 17% in the Annual Energy Production (AEP). A few other problems caused by icing on wind turbines other than loss in power production; could include the disrupted blade aerodynamics, overloading due to delayed stall, elevated fatigue stresses and, imbalance caused due to ice loads and wind loading [3], in addition to the damage caused due to the shedding of ice chunks [4]. Also, it is observed that the ice thickness and the ice shape have a major impact on the unsteady aerodynamic coefficients [5] and occurs in the galloping phenomenon [6], [7].…”

mentioning

confidence: 99%

“…Predominantly, the need to investigate the flow over a modified airfoil surface has cultivated an interest in the minds of scientists and engineers; however, determination of the surface pressure characteristics in addition to the underlying dynamics is quite challenging thus, requiring a clear and concise understanding. Reference [3] studied the effects of ice accretion on both the symmetrical and unsymmetrical airfoils under different operating and geometric conditions, expressing the fact that the ice accretion contributes to the loss in the aerodynamic performance of the blade profile. Many researchers have claimed the leading edge to be the most susceptible part for the formation of ice [8], [9], [10] put forth the effect of atmospheric temperature and droplet size variation on the ice accretion of wind turbine blades.…”

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confidence: 99%

Estimation of Chaotic Surface Pressure Characteristics of Ice Accreted Airfoils–A 0–1 Test Approach

et al. 2021

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Airfoils have their respective applications in almost every engineering field ranging from wind turbine blades, aircraft, and cooling fans to sophisticated electronic components. Thus, the flow over the airfoils is of primary focus to engineers in developing appropriate applications to meet the current standards in technology as well as demands. However, the underlying surface pressure characteristics need significant attention to understand the flow over airfoils completely. Generally, the flow over an airfoil and the time series pressure on the surface is linear and hence the aerodynamic forces are considered to be linear. But as the flow is perturbed due to external disturbances, nonlinearities creep in, and the surface pressure characteristics exhibit nonlinear behaviour. The ice accretion on the leading edge of the airfoil was witnessed to be an opportunity to investigate the nonlinear surface pressure characteristics. The current experimental study aims to investigate the dynamics of the surface pressure characteristics of four distinct ice geometries on the NACA0012 airfoil at a Reynolds number of 2  10 5 . The angle of attack of the airfoil was varied from 0 o to 24 o with an increment of 3 o . The 0-1 test for chaos was applied to the ice accreted airfoils at all the pressure ports on the suction surface of the airfoil. The test gives a single value for K, known as the asymptotic growth rate of the mean squared displacement. The value of K = 0 implies that the underlying dynamics could be periodic and when the value of K = 1, the underlying dynamics show aperiodicity and hence chaos. The horn iced airfoil performed significantly weaker compared to other ice accretion geometries because a significantly higher amount of chaos was produced in the flow field due to the presence of a geometry resembling a separation bubble. This aided in the substantial increment in drag and loss of lift for the horn ice accreted airfoil.

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Study of ice accretion along symmetric and asymmetric airfoils

Cited by 38 publications

References 9 publications

A review on ice detection technology and ice elimination technology for wind turbine

A review on ice detection technology and ice elimination technology for wind turbine

Experimental and Theoretical Studies of Wet Snow Accumulation on Inclined Cylindrical Surfaces

Estimation of Chaotic Surface Pressure Characteristics of Ice Accreted Airfoils–A 0–1 Test Approach

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