Abstract
This article deals with a problem of evaporation numerical modeling in cryogenic systems of constant volume. Particularly, a method of nitrogen evaporation modeling in cryogenic fueling tank was considered. User-defined functions of nitrogen thermodynamic properties in temperature range of 70…400 K and pressure range of 0.1…30 MPa. The result of this research is calculation algorithm which allows to model processes of phase change in cryogenic systems with constant volume. A comparison obtained between results of numerical modeling with experimental and analytical data is presented. Deviation of results from experimental data is 5-10%.
Highlights
A wide range of optical-electronic devices and systems, which require a cryogenic temperatures for its normal operation, is used onboard of aircrafts
High pressure gas is required for throttle refrigeration system operation
Throttle refrigeration systems can be divided on systems with open and closed cycle
Summary
A wide range of optical-electronic devices and systems, which require a cryogenic temperatures for its normal operation, is used onboard of aircrafts. Throttle system with closed cycle includes compressor, evaporator and condenser which significantly increases mass of system and decreases its durability In open throttle systems gas from high-pressure tank passes from the throttle and cools an object of refrigeration These systems utilize cryogenic working fluid in both critical and supercritical conditions as well s liquid working fluid in some special cases. In systems with open cycle (tank systems), mass of the fueled gas and working fluid parameters determine their exploitation properties and realistic characteristics It is a reason why creation of new type of tank able to operate as a part of onboard refrigeration system with improved characteristics (improvement must be achieved by advantages of tank) is important task [1]
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