Inclement Weather Considerations for Aircraft Engines

Venkataramani, K. R.; McVey, Leslie; Holm, Raymond; Montgomery, Kirk

doi:10.2514/6.2007-695

Cited by 6 publications

(2 citation statements)

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“…When the windward surface of an aircraft passes through clouds, supercooled droplets adhere to the solid surface and freeze when the surface temperature is far below the freezing point of water. Icing is one of the common causes of aviation accidents [1], and the icing problem of aero-engines is particularly serious [2]. Ice reduces the flow area, changes the natural frequency and destroys the dynamic balance of the rotor.…”

Section: Introductionmentioning

confidence: 99%

Influence of Spinner Shape on Droplet Impact over Rotating Spinners

et al. 2023

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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.

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Section: Introductionmentioning

confidence: 99%

Influence of Spinner Shape on Droplet Impact over Rotating Spinners

et al. 2023

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“…Inclement weather consideration play an important role in design, analysis, testing and operation of modern high bypass aircraft engines (Venkataramani et al 2007). Since 1990 until 2005, about 240 air crashes have been reported due to the icing in daily flights, which 62 cases were reported as the turbofan engines power loss events.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Ice Accretion Effects of Airplane Compressor Cascade of Stator Blades on the Aerodynamic Coefficients

Ramezanizadeh¹,

S.M.H.²,

Mirzaei

et al. 2013

JAFM

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In this paper the effects of ice accretion on the pressure distribution and the aerodynamic coefficients in a cascade of stator blades were experimentally investigated. Experiments were conducted on stage 67A type stator Controlled-Diffusion blades, which represent the mid-span of the first stage of the stator for a high-bypass turbofan engine. The measurements were carried out over a range of cascade angle of attack from 20° to 45° at Reynolds number of 500000. Experimental blade surface pressure coefficient distribution, lift and drag force coefficients, and momentum coefficients for clean blades were compared with those of the iced blades and the effects of ice accretion on these parameters were discussed. It is observed that the ice accretion on the blades causes the formation of flow bubble on the pressure side, downstream of the leading edge. By increasing the angle of attack from 20° to 35°, the bubble length decreases and the pressure coefficient increases inside the bubble region, constantly. In addition, for the iced blades the diffusion points at the suction side come closer to the trailing edge. In addition, it is found that by increasing the angle of attack up to 35°, the ice accretion has no significant effect on the lift coefficient but the drag coefficient increases comparing with the clean blades. More over at 40° and 45°, by increasing the flow interference effects between the blades, the iced blades experience higher lift and lower drag in comparison with the clean ones.

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