Investigation on the Mechanism of Heat Load Reduction for the Thermal Anti-Icing System

Rongjia Li, Guangya Zhu and Dalin Zhang
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Rongjia Li: College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Guangya Zhu: Interdisciplinary Research Institute of Aeronautics and Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Dalin Zhang: Interdisciplinary Research Institute of Aeronautics and Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

Energies, 2020, vol. 13, issue 22, 1-19

Abstract: The aircraft ice protection system that can guarantee flight safety consumes a part of the energy of the aircraft, which is necessary to be optimized. A study for the mechanism of the heat load reduction in the thermal anti-icing system under the evaporative mode was presented. Based on the relationship between the anti-icing heat load and the heating power distribution, an optimization method involved in the genetic algorithm was adopted to optimize the anti-icing heat load and obtain the optimal heating power distribution. An experiment carried out in an icing wind tunnel was conducted to validate the optimized results. The mechanism of the anti-icing heat load reduction was revealed by analyzing the influences of the key factors, such as the heating range, the surface temperature and the convective heat transfer coefficient. The results show that the reduction in the anti-icing heat load is actually the decrease in the convective heat load. In the evaporative mode, decreasing the heating range outside the water droplet impinging limit can reduce the convective heat load. Evaporating the runback water in the high-temperature region can lead to the less convective heat load. For the airfoil, the heating power distribution that has an opposite trend with the convective heat transfer coefficient can reduce the convective heat load. Thus, the optimal heating power distribution has such a trend that is low at the leading edge, high at the water droplet impinging limit and zero at the end of the protected area.

Keywords: anti-icing; heat and mass transfer; heating power distribution; heat load reduction; optimization method; experimental validation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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