METHOD OF REMOVING UNDRAINABLE WATER RESIDUE IN INNER CAVITIES OF A TANK COMPARTMENT OF AN AIRCRAFT Russian patent published in 2019 - IPC F26B9/06 

FIELD: aviation.

SUBSTANCE: invention relates to aircraft-rocket equipment, namely, to devices for drying tank compartments of aircrafts with fuel intake system (removal of undrainable water residue from its inner cavities). Tank compartments of aircraft-rocket equipment can be made of aluminum alloy, therefore temperature of drying for such tanks is limited by maximum temperature (no more than 110 °C). So, with reduction of pressure at constant temperature of evaporated water rate of evaporation sharply increases. This results in increase of heat costs for phase conversions of water into steam. Water is quickly cooled down and evaporation intensity drops. In order to constantly maintain a high rate of evaporation, it is necessary to constantly reduce pressure, that is, the evaporation process must be carried out in cycles, with reduction of pressure from atmospheric pressure. Taking into account that with reduction of pressure, tank is cooled in the place where water is located, it is necessary to intensively heat this place. In order to achieve the technical result, infrared heaters are located directly under tank compartment bottom. Infrared heaters are divided into controlled zones with tank compartment, where undrainable residues of water can be located. Heating managing and control is performed autonomously by zones in the tank compartment where water is supposed to be. Setting temperature mode of drying in each zone is carried out through a thermocouple connected to a digital controller, on which the limiting heating temperature is set. Thermocouples are installed on detachable clamps and are fixed with their help to tank compartment bottom by zones where water is located. This technical solution considerably reduces duration, energy and labor intensity of drying process in comparison with other devices.

EFFECT: reduced duration of drying to remove undrainable residue of water from inner cavities of tank compartment, as well as reduction of power consumption and labor intensity of drying process.

4 cl, 2 dwg