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

Kreeger, Richard E.; Work, Andrew H.; Douglass, Rebekah G.; Gazella, Matthew R.; Koster, Zakery; Turk, Jodi

doi:10.2514/6.2016-3443

Cited by 4 publications

(2 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is also necessary to obtain data to improve and validate the model. A project was undertaken at NASA GRC to achieve these goals, which is documented in the literature [167,168] Once the images that contained a shed were identified, a four-point projective plane transformation was required to correct the perspective error of the camera on the ceiling.…”

Section: Shed Trajectory Predictionmentioning

confidence: 99%

The measurement of the adhesion of glaze ice.

Hardesty¹

View full text Add to dashboard Cite

Icing is a lethal and costly aviation hazard affecting aircraft of all sizes ranging from small UAVs to large commercial craft such as the Boeing 787, resulting in hundreds of deaths over the last century and resulting in billions of dollars of economic impact. Three predominant types of icing, namely, airframe icing, engine icing, and rotorcraft icing, dominate aircraft icing research. Each type poses unique challenges. In the case of rotor icing, attention needs to give to the rotating environment with large oscillatory loads and icing conditions. In the case of airframe icing, special attention needs to be paid to a variety of loading cases from the available options for de-icing and anti-icing equipment. In the case of engine icing, the formation mechanism is poorly understood and the structure of the ice needs to be studied in greater detail. Airframe icing requires However, all three share the same fundamental problem that ice sticks to surfaces. How strongly ice adheres to a surface dictates how hard it is to remove. The adhesion strength then regulates the primary threat from icing-the maximum aerodynamic penalty that accretion will have. It also dictates the threat of impingement from shed ice elsewhere on the aircraft, such that a piece of ice from the main rotor could strike the tail rotor on a helicopter, destroying it.

show abstract

Section: Shed Trajectory Predictionmentioning

confidence: 99%

The measurement of the adhesion of glaze ice.

Hardesty¹

View full text Add to dashboard Cite

show abstract

“…For rotating components, although some conclusions made on stationary parts still hold, the freezing mechanism is complicated by centrifugal and Coriolis forces. Recently, several studies have documented the icing characteristics on rotating blades [11,12], and on rotating spinners [13][14][15][16]. Bidwell et al [13] found that the extent of icing of the spinner increases with the increase of droplet size, while that on the downstream components decreases.…”

Section: Introductionmentioning

confidence: 99%

Influence of Spinner Shape on Droplet Impact over Rotating Spinners

et al. 2023

View full text Add to dashboard Cite

Droplet impact affects water collection, which is the key to investigating the icing process on an aero-engine spinner. Different from a stationary spinner, droplet impact is affected by Coriolis acceleration and centrifugal acceleration on rotating aero-engine spinners, showing different impact dynamics. Based on the Eulerian method, using the rotating coordinate system we numerically investigated droplet impact characteristics on three different shapes of aero-engine spinners using ANSYS Fluent. The results indicate that the impact area covered all the windward surface on the conical spinner, and only covered the windward surface prior to the impingement limit of the elliptical spinner and the coniptical spinner. The sensitivity of water collection to inflow velocity declined in the order of coniptical the spinner, the elliptical spinner, and the conical spinner. In addition, the elliptical region could effectively improve aerodynamic performance, as shown in a lower total pressure loss through the spinner. This work is relevant to the anti-icing system of a rotating aero-engine spinner.

show abstract

Icing Formation Strains on Airfoil Skin

Work¹

2021

Aiaa Aviation 2021 Forum

View full text Add to dashboard Cite

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

Cited by 4 publications

References 6 publications

The measurement of the adhesion of glaze ice.

The measurement of the adhesion of glaze ice.

Influence of Spinner Shape on Droplet Impact over Rotating Spinners

Icing Formation Strains on Airfoil Skin

Contact Info

Product

Resources

About