The cooling problem of hot-end components has become an important factor restricting the aero-engine performance, life and reliability. In order to improve the cooling quality of the cooling air, the supercritical aviation kerosene was used as a heat sink to cool the cooling air in a spiral heat exchanger. The flow and heat transfer process of the air-oil heat exchanger with spiral tube were numerically simulated using Fluent software. The flow and heat transfer situation of air and aviation kerosene were analyzed in detail. The optimized spiral heat exchanger with the diaphragm was presented to enhance the heat transfer capacity of the air side. It is found that the heat transfer performance of the air-oil heat exchanger is greatly enhanced by the spiral tube due to the secondary flow effect. With the increase in the turning angle of the spiral tube, the effect of the secondary flow for the heat transfer enhancement is strengthened. The PEC index of the spiral heat exchanger increases with the increase in the air flow rate. The spiral heat exchanger with the diaphragm can effectively improve the heat transfer performance of the heat exchanger, and increase the PEC index of the air side by more than 20%.
HuangHSpadacciniLJSobelDR. Fuel-cooled thermal management for advanced aeroengines. J Eng Gas Turbines Power2004; 126(2): 284–293.
2.
KimSMinJKHaMY, et al.Investigation of high-speed bypass effect on the performance of the surface air-oil heat exchanger for an aero engine. Int J Heat Mass Tran2014; 77: 321–334.
3.
NackeRNorthcuttBMudawarI. Theory and experimental validation of cross-flow micro-channel heat exchanger module with reference to high mach aircraft gas turbine engines. Int J Heat Mass Tran2011; 54(5–6): 1224–1235.
4.
KimMHaMYMinJK. A numerical study on various pin-fin shaped surface air-oil heat exchangers for an aero gas-turbine engine. Int J Heat Mass Tran2016; 93: 637–652.
5.
ZhaoZWangXCheD, et al.Numerical studies on flow and heat transfer in membrane helical-coil heat exchanger and membrane serpentine-tube heat exchanger. Int Commun Heat Mass Tran2011; 38(9): 1189–1194.
6.
XingJ. Study on flow and enhanced heat transfer performance in spiral wound tube heat exchanger. Zheng Zhou, China: North China University of Water Resources and Electric Power, 2020.
7.
LiuSBaoZHuangW, et al.Numerical investigation of boundary grid effect on heat transfer computation of RP-3 at supercritical temperature of helical tube wall. J Therm Sci2021; 30(2): 504–516.
8.
WangSJianGXiaoJ, et al.Fluid-thermal-structural analysis and structural optimization of spiral-wound heat exchanger. Int Commun Heat Mass Tran2018; 95: 42–52.
9.
JiangLLiB. Effect of structural characteristics on the performance of spiral tube heat exchanger. Packag Eng2020; 41(13): 197–203.
10.
JamshidiNFarhadiMGanjiD, et al.Experimental analysis of heat transfer enhancement in shell and helical tube heat exchangers. Appl Therm Eng2013; 51(1–2): 644–652.
11.
KoTHTingK. Entropy generation and thermodynamic optimization of fully developed laminar convection in a helical coil. Int Commun Heat Mass Tran2005; 32(1–2): 214–223.
12.
RenYCaiWChenJ, et al.Numerical study on the shell-side flow and heat transfer of superheated vapor flow in spiral wound heat exchanger under rolling working conditions. Int J Heat Mass Tran2018; 121: 691–702.
13.
RenYCaiWJiangY. Numerical study on shell-side flow and heat transfer of spiral-wound heat exchanger under sloshing working conditions. Appl Therm Eng2018; 134: 287–297.
14.
NaphonP. Thermal performance and pressure drop of the helical-coil heat exchangers with and without helically crimped fins. Int Commun Heat Mass Tran2007; 34(3): 321–330.
15.
AbdelmagiedM. Thermal performance characteristics of a triple spiral tube heat exchanger. Chemical Eng and Processing-Process Intens2020; 149: 107707.
16.
PanCZhouYWangJ. CFD study of heat transfer for oscillating flow in helically coiled tube heat-exchanger. Comput Chem Eng2014; 69: 59–65.
17.
FerngYMLinWCChiengC. Numerically investigated effects of different dean number and pitch size on flow and heat transfer characteristics in a helically coil-tube heat exchanger. Appl Therm Eng2012; 36: 378–385.
18.
YanGHYanHJiangN, et al.Flow and heat transfer performance test of new aero-engine air cooler. Aeroengine2023; 49(4): 48–53.
19.
LiuYXuGFuY, et al.Airside pressure drop characteristics of three analogous serpentine tube heat exchangers considering heat transfer for aero-engine cooling. Chin J Aeronaut2022; 35(12): 32–46.
20.
QiWXinYPHongYT, et al.Study on the influence of air-oil heat exchanger on the overall performance of variable cycle aero-engine. J Propuls Technol2023; 44(2): 39–48.
21.
LiHHuangHXuG, et al.Performance analysis of a novel compact air-air heat exchanger for aircraft gas turbine engine using LMTD method. Appl Therm Eng2017; 116: 445–455.
22.
DengW. Application of high temperature air cooler for aero-engine. Beijing, China: Beijing University of Aeronautics and Astronautics, 2013.
23.
TaoZChengZZhuJ, et al.Effect of turbulence models on predicting convective heat transfer to hydrocarbon fuel at supercritical pressure. Chin J Aeronaut2016; 29(5): 1247–1261.
24.
WangHLuoYGuH, et al.Experimental investigation on heat transfer and pressure drop of kerosene at supercritical pressure in square and circular tube with artificial roughness. Exp Therm Fluid Sci2012; 42: 16–24.
25.
McEligotDMJacksonJD. “Deterioration” criteria for convective heat transfer in gas flow through non-circular ducts. Nucl Eng Des2004; 232(3): 327–333.
26.
XuGQDengHWZhangCB, et al.Density measurements of endothermic hydrocarbon fuel at sub-and supercritical conditions. J Chem Eng Data2011; 56(6): 2980–2986.
27.
DengHWZhangCBXuGQ, et al.Viscosity measurements of endothermic hydrocarbon fuel from (298 to 788) K under supercritical pressure conditions. J Chem Eng Data2012; 57(2): 358–365.
28.
ZhouHWenJDengH, et al.Thermal conductivity experiment of multi-component hydrocarbon fuel RP-3. J Beijing Univ Aeronaut Astronaut2013; 39(10): 1387–1391.
29.
ZhongFFanXYuG, et al.Heat transfer of aviation kerosene at supercritical conditions. J Thermophys Heat Tran2009; 23(3): 543–550.
30.
WangSZhangWNiuZ, et al.Mixed convective heat transfer to supercritical carbon dioxide in helically coiled tube. CIE J2013; 64(11): 3917–3926.
31.
TaoWQ. Heat transfer. 5th ed.Beijing, China: Chinese High Education Press, 2019, p. 245.
32.
ZhangZSCuiGX. Fluid mechanics. 3rd ed.Beijing, China: Tsinghua University Press, 2015, p. 302.
33.
YuCLZhangHQZengM, et al.Numerical study on turbulent heat transfer performance of a new compound parallel flow shell and tube heat exchanger with longitudinal vortex generator. Appl Therm Eng2020; 164: 114449.
34.
WebbRL. Performance evaluation criteria for use of enhanced heat transfer surfaces in heat exchanger design. Int J Heat Mass Tran1981; 24(4): 715–726.
