Research on Water System Inline Heater Heating Performance Simulation of Civil Aircraft

The water system in civil aircraft is indispensable and important. During the design of the water system, cold weather is a severe working condition, which will cause the water system to freeze and lose water supply function, so the heating and anti-freezing design of the water system is necessary. An inline heater is a new heating and anti-freezing equipment for water system pipelines, with the advantage of convenient installation and high heating efficiency. In this paper, the fluid-solid coupling heat transfer simulation is used to study the heating and anti-freezing effect of the inline heater, considering the influence of the water flow rate and the heater power. Through analysis, increasing the water flow rate can improve the heating efficiency of the inline heater, but it also puts forward a higher heater requirement for the inline heater. With the increase of the heating power of the inline heater, its heat utilization rate is constantly decreasing, so blindly increasing the heating power can not significantly improve the heating and anti-freezing performance. This study can guide the water system inline heater design of civil aircraft.