Prediction of Rotor Blade Ice Shedding Using Empirical Methods

Bain, Jeremy; Cajigas, Juan; Sankar, Lakshmi N.; Flemming, Robert J.; Aubert, Roger J.

doi:10.2514/6.2010-7985

Cited by 13 publications

(4 citation statements)

References 5 publications

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“…Higher fidelity self-shedding analyses 2,3 have also been developed and demonstrated for rotorcraft. These are typically based on empirical adhesion models expanding on the methods of Fortin et.…”

Section: Overview Of Shedding Modelsmentioning

confidence: 99%

Analysis and Prediction of Ice Shedding for a Full-Scale Heated Tail Rotor

Kreeger

Work

Douglass

et al. 2016

8th AIAA Atmospheric and Space Environments Conference

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When helicopters are to fly in icing conditions, it is necessary to consider the possibility of ice shed from the rotor blades. In 2013, a series of tests were conducted on a heated tail rotor at NASA Glenn's Icing Research Tunnel (IRT). The tests produced several shed events that were captured on camera. Three of these shed events were captured at a sufficiently high frame rate to obtain multiple images of the shed ice in flight that had a sufficiently long section of shed ice for analysis. Analysis of these shed events is presented and compared to an analytical Shedding Trajectory Model (STM). The STM is developed and assumes that the ice breaks off instantly as it reaches the end of the blade, while frictional and viscous forces are used as parameters to fit the STM. The trajectory of each shed is compared to that predicted by the STM, where the STM provides information of the shed group of ice as a whole. The limitations of the model's underlying assumptions are discussed in comparison to experimental shed events..

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Section: Overview Of Shedding Modelsmentioning

confidence: 99%

Analysis and Prediction of Ice Shedding for a Full-Scale Heated Tail Rotor

Kreeger

Work

Douglass

et al. 2016

8th AIAA Atmospheric and Space Environments Conference

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“…In addition to complex simulation methods for predicting ice accretion on rotors, some simplified methods are also developed [15][16][17][18][19][20][21][22]. Based on the Lewice3D, Narducci [15,16] developed an analysis method to evaluate the ice accretion for a helicopter rotor.…”

Section: Introductionmentioning

confidence: 99%

“…Rajmohan [17] developed a quasi-steady numerical method for ice accretion on helicopter rotors in forward flight using Lewice3D. Bain [18] used the same approach to predict ice accretion and ice shedding for rotors in forward flight. All these methods extracted representative airfoil conditions for blade sections at different radial and azimuthal locations, and predicted the ice accretion using 2-D simulations, as mentioned in reference 16.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Aerodynamic Characteristics of Iced Rotor in Forward Flight

2019

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Based on a 3-D rotor icing model and the CLORNS code, aerodynamic characteristics of iced rotors in forward flight are calculated and analyzed. At first, ice accretion on the UH-1H rotor in hover, and ice accretion on the SRB rotor in forward flight are calculated. The results are used to validate the employed numerical simulation method through comparisons with experimental data. Then, the degradation of the aerodynamic characteristics of the iced SRB rotor is analyzed, and the variation of the pressure coefficients on the rotor blades is discussed in detail. Finally, parameters, such as the icing time, the temperature, and the icing position, are quantified, and conclusions are obtained. The influence of the ice accretion on the sectional aerodynamic characteristics increases along the spanwise direction, and deicing near the 0.7R blade section should be preferred at the beginning of the ice accretion. Finally, it is concluded that ice will not be removed in time if the deicer is activated based solely on the variation of the rotor aerodynamics.

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“…Some scholars managed to study the threedimensional rotor icing numerical simulation method. For example, Bain et al 6 used LEWICE to calculate the rotor icing, and the two-dimensional calculation ice accretion module was used in the ice growth. Cao et al 7 developed a rotor icing model based on the empirical two-dimensional airfoil icing tunnel data.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation for three-dimensional rotor icing in forward flight

Wang

Zhao

Zhu

2018

Advances in Mechanical Engineering

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Icing will occur when helicopters pass through clouds containing supercooled droplets. The ice accreted on rotor blade affects the safety of helicopter. A numerical simulation method of helicopter rotor icing in forward flight is presented, and the icing characteristics of rotor are studied. The flow field is calculated based on the overlapping grids, and the Eulerian model is applied in the droplet trajectory calculation. The unsteady method is used to calculate rotor flow field and droplet trajectory. The icing model considering the effect of centrifugal force is adopted to simulate the ice shapes of rotor in forward flight. The average ice growth rate is compared with the ice growth rate at each azimuth angle, and the effects of blade pitch and forward flight speed on the droplet impingement and icing characteristics are summarized. Finally, the influence of time step on the calculation results is analyzed. The calculation results show that the droplet impingement characteristics and icing characteristics change continuously in forward flight. The ice growth rate and droplet collection efficiency are larger on the advancing blade and smaller on the retreating blade.

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Prediction of Rotor Blade Ice Shedding Using Empirical Methods

Cited by 13 publications

References 5 publications

Analysis and Prediction of Ice Shedding for a Full-Scale Heated Tail Rotor

Analysis and Prediction of Ice Shedding for a Full-Scale Heated Tail Rotor

Numerical Analysis of Aerodynamic Characteristics of Iced Rotor in Forward Flight

Numerical simulation for three-dimensional rotor icing in forward flight

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