Aerodynamic validation studies on the performance analysis of iced wind turbine blades

Yirtici, Özcan; Cengiz, Kenan; Özgen, Serdar; Tuncer, İsmail H.

doi:10.1016/j.compfluid.2019.104271

Cited by 23 publications

(17 citation statements)

References 11 publications

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“…The water droplet is regarded as a continuous phase. The continuity equation and momentum equation of the water droplet phase are solved by the finite volume method, as shown in formulas (10) and (11). Among them, it is assumed that the initial velocity of the water droplet is equal to the incoming flow velocity, and the volume of the water droplet does not affect the flow field quality of the surrounding flow.…”

Section: Airflow Solutionmentioning

confidence: 99%

“…That is, the blades are intercepted at certain intervals to obtain multiple blade sections, each section is calculated and analyzed separately, and the results of each section are connected in series to characterize the icing condition of the entire blade, which is mostly used for large horizontal axis wind turbine blades. The research results of Yirtici et al show that the power loss of a 30 kW horizontal axis wind turbine can reach 20% for one hour when it freezes [10].…”

Section: Introductionmentioning

confidence: 99%

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Numerical Calculation Method of Spanwise Icing Characteristics and Performance Loss of Three-Dimensional Vertical Axis Wind Turbine Blades

Wang

Tang

et al. 2022

Journal of Sensors

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Most icing studies use 2D or quasi-3D models, ignoring the effects of blade span and tip icing. In this paper, a new model for predicting 3D vertical axis wind turbine blades icing by supplementing the blade span is established, the icing characteristics of blades under multiple working conditions are simulated step by step from the time scale, and the unsteady icing laws are compared and analyzed. Ice properties and surface temperature distribution determine the corresponding deicing power. The analysis results show that the unfrozen water film flows in the spanwise direction of the blade, resulting in a smaller icing limit on the pressure surface than the two-dimensional model, which indicates that the chordwise anti-icing structure can be set in a small range. At the same time, the annular ridge ice formed at the end of the blade slows down the reduction rate of the lift-drag ratio of the blade, effectively reducing the influence of the leading edge ice shape on the aerodynamic performance of the blade. Finally, the critical ice melting power density required to reach equilibrium temperature at the leading edge of the blade is reduced by about 11% compared to the trailing edge due to the increased thermal resistance of the gas-to-blade matrix interface by the ice layer.

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Section: Airflow Solutionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical Calculation Method of Spanwise Icing Characteristics and Performance Loss of Three-Dimensional Vertical Axis Wind Turbine Blades

Wang

Tang

et al. 2022

Journal of Sensors

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“…of 2D blade sections are evaluated by the XFOIL algorithm. It is a general accepted code that is widely used by the scientific community for aerodynamic analyses [38][39][40]. In majority of the cases, it becomes impossible to deliver the performance coefficients at high angles of attack beyond the stall conditions using XFOIL, due to the convergence problems.…”

Section: Qblade and Xfoil Algorithmsmentioning

confidence: 99%

Numerical Analyses of a Straight Bladed Vertical Axis Darrieus Wind Turbine: Verification of DMS Algorithm and Qblade Code

Muratoğlu¹,

Demir²

2019

European Journal of Technic

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Wind energy is among the most cost-effective renewable energies. Till date, turbines with different configurations had been designed to harness wind power, each having unique superiorities. Darrieus turbines are one of the mostly investigated vertical axis wind turbines using either experimental or numerical methods. Experimental analyses are time consuming works which requires high amount of effort and expenses. Thus, computational fluid dynamics (CFD) methods have been commonly used by scientists and engineers in order of obtaining detailed performance and illustration of the fluid flow. Contrary to the horizontal axis machines, Darrieus turbines are difficult to be analyzed by CFD algorithms due to high pressure and velocity variations which arise from extreme changes in the angle of attack beyond the stall condition at different azimuthal position of the blades. Therefore, more simplified numerical models are generated employing double multiple streamtube (DMS) theory together with additional improvements. QBlade is one of the mostly used numerical methods based on the lifting line free vortex wake method developed for calculating rotor aerodynamics. The main scope of this study is to design a straight bladed Darrieus turbine (D=1028 mm, H=1460 mm, N=3) and to verify the double multiple streamtube theory and QBlade algorithm with the experimental and computational works. Analysis results represented good agreement with the previous studies especially at lower TSR ranges. Compare to the experimental results, an overestimation in the power coefficient is obtained at low free stream speed and high TSR ranges after exceeding the peak point. Sensitivity of the model to the Re number variations have also been outlined.

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“…On the other hand, the use of air jet impingement method is usually preferred for anti-icing application of aircraft [6]. Besides, the anti-icing application can be applied for wind turbine's blade due to high velocity fluctuations on the leading edge of it [7]. The ice shape, mass, droplet shape, and prediction of accumulation of it using numerical methods are the most important parameters in flight industries to minimize in-flight accidents [8].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Parameters Affecting Anti-Icing Performance on Wing Leading Edge of Aircraft

Pazarlıoğlu

Tepe

Arslan

2022

European Journal of Science and Technology

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In this article, one of the hazardous trouble in-flight situations called ice accumulation on wing leading edge of aircraft has been numerically investigated. While the target surface is kept constant temperature at Tw=263.15 K, the inlet temperature is taken constant at Tin=473.15 K and it enters to the system with 𝑚̇= 0.004 kg/s. The investigation starts with validation of numerical study utilizing airfoil type of NACA 0015 using constant piccolo tube dimensions, jet angle, distance among jets and distance between jet-to-target positions. The second and third stages are to analyze the anti-icing performance of changing positions of piccolo tube on X (4≤H/d≤8) and Y (-1.25≤L/d≤1.25) directions under different jet angles (30°≤≤150°). The fourth stage is to determine the optimum H/d, L/d, and ratios to increase anti-icing performance with maximum convective heat transfer and minimum pressure drop condition. The optimization study has been done using Response Surface Methodology (RSM). Finally, while the best anti-icing performance proposed design is achieved using° L/d=0.0, and H/d=4.0, the optimization results show that the L/d, and H/d values should be 55.45°, 0.0, and 4.0, respectively to achieve maximum heat transfer rate with minimum pressure drop value.

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Aerodynamic validation studies on the performance analysis of iced wind turbine blades

Cited by 23 publications

References 11 publications

Numerical Calculation Method of Spanwise Icing Characteristics and Performance Loss of Three-Dimensional Vertical Axis Wind Turbine Blades

Numerical Calculation Method of Spanwise Icing Characteristics and Performance Loss of Three-Dimensional Vertical Axis Wind Turbine Blades

Numerical Analyses of a Straight Bladed Vertical Axis Darrieus Wind Turbine: Verification of DMS Algorithm and Qblade Code

Optimization of Parameters Affecting Anti-Icing Performance on Wing Leading Edge of Aircraft

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