Turbo-fan Engine Hail Ingestion Simulation in a Cycle Deck Model

Venkataramani, K. R.; Patel, B. S.; Riemann, Don

doi:10.2514/6.2005-1126

Cited by 2 publications

(2 citation statements)

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“…Most of the water droplets impacting with the cone and blade surface, will inevitably form a water film. 10,11 The working condition of the compressor is affected due to the water ingestion, which also leads to a decrease in its aerodynamic performance and operational stability. 12,13 Therefore, the presence of liquid water in the atmosphere is also an important factor affecting the work of the compressor.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical research on flow characteristics of inlet particle separator for aero-engine under the influence of water film

Luo

Liu

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part G:

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An aero-engine must be able to operate in all-weather conditions, which requires the aircraft to be safe throughout the flight even in bad weather. Excessive intake of rainwater can induce stall and surge of compressor and flameout of combustion chamber, which will lead to the loss of power of the engine. In rainy weather, water come into the engine inlet protection device, which directly determines the compressor inlet conditions and will further affect the compressor working condition and the matching features. In this paper, special attention was paid to the experimental characteristics of aero turbo-shaft engine inlet particle separator (IPS) and the numerical study employing ANSYS-CFX under water spraying condition. Based on the phenomenon of water film forming on the wall surface of the IPS and the experimental data under different water spraying conditions, combined with the predictions from CFD study, an empirical model of water film flow on the wall surface has been developed. The results indicate that in the case of high water ingestion, droplets will inevitably form water film on the wall after entering the IPS. Due to the viscous resistance of wall water film and its influence on the airflow boundary layer, the flow state inside the IPS will change. By establishing a wet wall water film model, the flow characteristics near the wall are closer to the experimental state. The total pressure loss prediction error was reduced from 24.8% to 5.2% and 26.4% to 5.7% under the uniform water spraying rate of 2.93% and 4.84%, respectively.

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Section: Introductionmentioning

confidence: 99%

Experimental and numerical research on flow characteristics of inlet particle separator for aero-engine under the influence of water film

Luo

Liu

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part G:

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“…Unfortunately, the raindrops concentration at engine inlet is higher than that in the atmosphere, because the scoop effect that occurs in flight descent must be taken into consideration 4 . More than 70% of droplets impinge on the cone and fan blades, where part of water droplets stick to their surface, and subsequently form a series of water films 5,6 . Although most of the incoming water is thrown into the outer duct after being redistributed by the fan and then discharged from the engine, there are still a significant amount of droplets enters the core compression system 7 .…”

Section: Introductionmentioning

confidence: 99%

Unsteady performance and thermodynamic analysis of aero‐engine compressor at different water ingestion conditions

et al. 2020

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Summary Aero‐engine compressor is seriously threatened by the ingestion of liquid water. This article aims to deeply study the influences of different water contents and droplet diameters on the unsteady performance and thermodynamic parameters of compressor through frequency spectrum analysis. The accuracy of numerical calculation for compressor performance is verified by experimental data. Results show that the compression performance will be reduced and the unsteady fluctuations inside compressor will be aggravated after water ingestion. For some important parameters, such as mass flow rate, total pressure and temperature ratio, as well as efficiency, their main frequencies are changed from the original blade passing frequency to the rotor passing frequency (RPF), and their amplitudes are also significantly amplified. The working point of compressor will experience the nonoptimal state with large amplitude and period for a long time, which is not conducive to the stable operation of the compressor. Moreover, within the range of 2% to 8% water contents and 50 to 150 μm droplet diameters, the fluctuation amplitude is correspondingly exacerbated with the increase of water content or droplet size, but its main frequency is maintained at RPF. Particularly, the tip clearance is the most sensitive region affected by water ingestion where the fluctuations of static pressure and temperature are the largest. The point that water content has a greater influence on the performance fluctuation of compressor is also confirmed in this article.

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Turbo-fan Engine Hail Ingestion Simulation in a Cycle Deck Model

Cited by 2 publications

References 0 publications

Experimental and numerical research on flow characteristics of inlet particle separator for aero-engine under the influence of water film

Experimental and numerical research on flow characteristics of inlet particle separator for aero-engine under the influence of water film

Unsteady performance and thermodynamic analysis of aero‐engine compressor at different water ingestion conditions

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