Analytical prediction of trajectories of ice pieces after release in an airstream

Kohlman, D. L.; Winn, Robert C.

doi:10.2514/6.2001-680

Cited by 8 publications

(5 citation statements)

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“…Effects of density on trajectories will be studied in this work. Similar to the work of Kohlman & Winn, 8 Yapalparvi et al 16 developed a reduced order model based on POD techniques to predict the trajectories of falling plate at varying values of ratio of density of plate to density of ambient fluid. They have obtained fairly good comparisons with the experiments 17 and were able to reconstruct the flow fields and trajectories efficiently.…”

Section: Introductionmentioning

confidence: 95%

Calculation of Ice Chunk Trajectory Using Proper Orthogonal Decomposition

Yapalparvi

Beaugendre

Morency

2012

4th AIAA Atmospheric and Space Environments Conference

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In this work, calculation of trajectories of ice chunk are carried out at varying values of ratio of density of ice piece to that of the ambient fluid. Proper Orthogonal Decomposition with Interpolation (PODI) method is then applied on snapshots of trajectories simulated by computational fluid dynamics. Snapshots of trajectories are obtained based on cartesian grids, penalization, and level sets. The extracted POD modes from snapshots are then used to reconstruct solutions and capabilities of POD with interpolation are demonstrated on ice trajectory calculations for flow around iced airfoil and cylinder for density ratio's that are not part of the snapshot set.

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Section: Introductionmentioning

confidence: 95%

Calculation of Ice Chunk Trajectory Using Proper Orthogonal Decomposition

Yapalparvi

Beaugendre

Morency

2012

4th AIAA Atmospheric and Space Environments Conference

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“…Kohlman and Winn [13] simulated ice trajectories in a rather simplified way in terms of flow and shapes: a uniform flowfield from an aircraft using square-shaped flat plates. A probabilistic map of high areas of impact was obtained by varying the initial orientation, width, and thickness of these plates.…”

Section: Introductionmentioning

confidence: 99%

Helicopter Rotor Ice Shedding and Trajectory Analyses in Forward Flight

Anthony

Habashi

2021

Journal of Aircraft

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Ice accretion on a helicopter's aerodynamic surfaces during flight can lead to incidents and fatal accidents. An iced helicopter blade results in a decrease in stall angle, an increase in required torque, as well as potential damage from shed ice. While the high centrifugal forces on a rotor may serve as a natural deicing mechanism, they can also lead to uneven ice shedding, causing rotor imbalances or hitting other blades, the fuselage, or the tail rotor. Computational methods are important for predicting in-flight ice formation and are a vital tool in the design of ice protection systems. The objective of this paper is to present a computationally inexpensive methodology to determine for a helicopter in forward flight, following a period of ice accretion, rotor ice crack locations, shedding times, and potential impact zones.

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“…The ice shedding problem can be investigated using wind tunnel tests [23] or computational simulations [24,25]. Papadakis et al [23] conducted ice shedding experiments with simulated ice shapes to generate data to validate ice shedding analysis tools.…”

Section: Introductionmentioning

confidence: 99%