Experimental Study on Ice Shedding Behaviors for Aero-Engine Fan Blade Icing during Ground Idle
Abstract
1. Introduction
2. Experimental Method
2.1. Experimental Setup
2.2. Spray Parameter Measurement and Calibration
2.3. Experimental Measurement
2.4. Experimental Conditions
3. Results and Discussion
3.1. Effect of Environmental Temperature T
3.2. Effect of Engine Speed n
3.3. Ice Accumulation on the High-Pressure Side
3.4. Explanation of Ice-Shedding Characteristics Based on Simplified Force Analysis
3.5. Degree of Ice-Shedding Balance
4. Conclusions
- (1)
- When the engine speed n is constant at 2400 rpm, the average of ice-shedding time is about 250 to 350 s and the characteristic length of the residual ice is about 0.4 to 0.6 in general. Both reduce first and then increase as the environmental temperature T decreases. Combined with experimental results and force analysis, it is indicated that there is a critical temperature at about −C, below which the extent of ice accretion will be significantly aggravated, including the increase in the amount of accumulated ice, the prolongation in , and the increase in ;
- (2)
- When the engine speed n is low, it can take hours for ice shedding, resulting in severe ice accretion. As n increases, decreases drastically and then slowly to one to two minutes or less, and gradually reduces. There is a critical engine speed , above which the purpose of natural ice shedding under rotation can be achieved initially within minutes. is about 2400 rpm when T = −C in the experiments;
- (3)
- The degree of ice-shedding balance can reach up to 30% in severe cases. The ice in Cases 3 (T = −C, n = 2400 rpm) and 9 (T = −C, n = 2400 rpm) falls off in a short period, resulting in sharp fluctuations in , which are dangerous conditions that need attention for icing operation;
- (4)
- Combining the amount of ice accretion, the time of ice shedding, and the degree of ice-shedding balance, the range of critical ambient temperature is −C to −C for aero-engine fan blade icing tests during ground idle. Furthermore, the ice accreted at the roots of the blades is difficult to shed even at high engine speeds. Effective anti-/de-icing methods need to be developed.
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Case | Set Temperature T (°C) | Engine Speed n (rpm) | Mean Temperature of Air Flow (°C) |
---|---|---|---|
1 | −2 | 2400 | −1.67 |
2 | −3.5 | 2400 | −3.48 |
3 | −5 | 2400 | −4.97 |
4 | −7 | 1800 | −7.08 |
5 | −7 | 2400 | −6.56 |
6 | −7 | 2700 | −6.53 |
7 | −7 | 3000 | −6.79 |
8 | −9 | 2400 | −8.89 |
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Wang, L.; Yang, K.; Yu, F.; Wang, F. Experimental Study on Ice Shedding Behaviors for Aero-Engine Fan Blade Icing during Ground Idle. Aerospace 2024, 11, 853. https://doi.org/10.3390/aerospace11100853
Wang L, Yang K, Yu F, Wang F. Experimental Study on Ice Shedding Behaviors for Aero-Engine Fan Blade Icing during Ground Idle. Aerospace. 2024; 11(10):853. https://doi.org/10.3390/aerospace11100853
Chicago/Turabian StyleWang, Liping, Kun Yang, Fang Yu, and Fuxin Wang. 2024. "Experimental Study on Ice Shedding Behaviors for Aero-Engine Fan Blade Icing during Ground Idle" Aerospace 11, no. 10: 853. https://doi.org/10.3390/aerospace11100853
APA StyleWang, L., Yang, K., Yu, F., & Wang, F. (2024). Experimental Study on Ice Shedding Behaviors for Aero-Engine Fan Blade Icing during Ground Idle. Aerospace, 11(10), 853. https://doi.org/10.3390/aerospace11100853