Abstract
The pre-cooler is an important component of the civil aircraft Pneumatic system, and the over-temperature of the system will affect the downstream air conditioning and wing anti-icing systems and other systems, which has an important impact on aircraft safety and passenger comfort. In order to ensure the heat transfer demand of the pre-cooler, the hot side exit temperature of the pre-cooler needs to be calibrated for various operating conditions. However, the flight test calibration is very costly and the actual flight conditions cannot reach the limit conditions, so it is especially important to study the pre-cooler performance calibration method. In this paper, we firstly consider the influence of various factors on the heat transfer performance of the pre-cooler, and then propose a method to calibrate the heat transfer performance of the pre-cooler by cyclically calculating the estimated flow rate of the cold side of the pre-cooler. In this article, the hot side outlet temperature of the pre-cooler was calculated by this method under different working conditions in the flight envelope of a certain aircraft, and compared with the actual flight data, and the difference was less than 5%, which verified the accuracy of this calculation method.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call