Research on the Influencing Factors and High Altitude Characteristics of Surge Tank Temperature for Aviation Piston Engine
Aiming at the intercooling system of an aero piston engine,the heat transfer mathematical model of the system was established.By comparing the simulation results with experimental data,it is found that the error in the simulation results of the cold side outlet temperature and hot side outlet temperature of the intercooler is within 1.5%,confirming the feasibility and reliability of the simulation model constructed in this paper.Furthermore,using the simulation model,the effects of air velocity,ambient temperature,supercharging ratio,intake air flow rate on the temperature of the surge tank were studied,and the altitude characteristics of the intercooling system of the aviation piston engine were analysed.The results show that,the temperature of the surge tank decreases with the increase of air speed,and increases with the increasing ambient temperature,supercharging ratio and intake air flow.The temperature of the surge tank is most sensitive to the supercharging ratio,and least sensitive the ambient temperature,with sensitivity to intake flow and air speed falling between the two.For the intercooling system of the aero engine,the maximum temperature of the surge tank and the maximum heat transfer of the intercooling system appear at the critical supercharging height,which are 82.4℃ and 11.5 kw under the condition of sea level temperature of 50℃,respectively.
aviation piston engineintercooling systemsurge tank temperaturesensitivityaltitude characteristic