测量航空发动机重要部件材料间接触热阻对发动机温度分布的准确评估十分重要，进而能为其部件优化设计、叶顶间隙控制和材料热防护提供重要参考价值。DD5和1Cr11Ni2W2MoV材料因具有良好的综合性能和优异的热疲劳和工艺性能而分别广泛应用于航空发动机涡轮叶片和机匣等部件。基于发动机连接部件界面实际工况，根据稳态热流法实验测量上述两材料接触热阻，并研究界面压力（45~200 MPa）和温度（150~300℃）对其影响。研究结果表明：接触热阻与界面压力和温度均存在幂律关系，且随两者增大而逐渐减小；相同界面压力和温度下，1Cr11Ni2W2MoV材料接触热阻比DD5的更小，但两者差距随压力增大而逐渐缩小。此外，拟合得到的两种材料接触热阻与界面压力和温度间的经验公式能较好地预测实验结果，与92.9%的实验数据相对误差小于12%。
王迪昌
,
廉曾妍
,
王沛
,
刘捷
. 界面平均温度和压力对DD5和1Cr11Ni2W2MoV材料接触热阻影响的实验研究[J]. 中国科学院大学学报, 2023
, 40(6)
: 726
-734
.
DOI: 10.7523/j.ucas.2022.044
Measuring the thermal contact resistance for the material of key component in aero-engine is very essential for accurate evaluation of temperature distribution about engine, which in turn could provide important reference value for the optimization design of its component, control for tip clearance and thermal protection for material. The material DD5 and 1Cr11Ni2W2MoV, which have good comprehensive properties and excellent thermal fatigue as well as process attributes, are widely used in aero-engine turbine blade and casing, respectively. Based on the actual working conditions of the interface of the engine connecting parts, the thermal contact resistance for the above two materials are measured experimentally according to the steady-state heat flow method, and the influences of interface pressure between 45 MPa and 200 MPa, and temperature ranging from 150℃ and 300℃ on it are investigated. The research indicates that thermal contact resistance displays a power-law relationship with the interface pressure and temperature, and gradually decrease with the increase of them; under the same contact pressure and temperature, thermal contact resistance of the material 1Cr11Ni2W2MoV is smaller than that of DD5 while the gap between both progressively narrows as the pressure grows. In addition, the empirical formulas of thermal contact resistance with the interface pressure and temperature for the two materials are obtained, which could predict the experimental results well, and the relative error with 92.9% of the experimental data is less than 12%.
[1] 刘松龄, 陶智. 燃气涡轮发动机的传热和空气系统[M]. 上海:上海交通大学出版社, 2018.
[2] 姜浩峰. 哪些核心技术,还在"卡脖子"?[J]. 新民周刊, 2018(26):52-55.
[3] 王祥和. 航空发动机热变形转子振动特性研究[D]. 哈尔滨:哈尔滨工业大学, 2017.
[4] 牛冬生. 涡轮叶尖间隙数值分析和冷热态尺寸换算方法研究[D]. 南京:南京航空航天大学, 2004.
[5] 姜远刚. 间隙主动控制系统中冷却流路的流动/换热特性研究[D]. 南京:南京航空航天大学, 2013.
[6] Chen Z. Surface integrity of broached Inconel 718 and influence of thermal exposure[D]. Linköping:Linköping University Electronic Press, 2014. DOI:10.3384/lic.diva-111062.
[7] Greenwood J A, Williamson J B P. Contact of nominally flat surfaces[J]. Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1966, 295(1442):300-319. DOI:10.1098/rspa.1966.0242.
[8] Cooper M G, Mikic B B, Yovanovich M M. Thermal contact conductance[J]. International Journal of Heat and Mass Transfer, 1969, 12(3):279-300. DOI:10.1016/0017-9310(69)90011-8.
[9] Mikić B B. Thermal contact conductance; theoretical considerations[J]. International Journal of Heat and Mass Transfer, 1974, 17(2):205-214. DOI:10.1016/0017-9310(74)90082-9.
[10] Cui T F, Li Q, Xuan Y M, et al. Multiscale simulation of thermal contact resistance in electronic packaging[J]. International Journal of Thermal Sciences, 2014, 83:16-24. DOI:10.1016/j.ijthermalsci.2014.04.006.
[11] Verma N N, Mazumder S. Extraction of thermal contact conductance of metal-metal contacts from scale-resolved direct numerical simulation[J]. International Journal of Heat and Mass Transfer, 2016, 94:164-173. DOI:10.1016/j.ijheatmasstransfer.2015.11.026.
[12] Dai Y J, Gou J J, Ren X J, et al. A test-validated prediction model of thermal contact resistance for Ti-6Al-4V alloy[J]. Applied Energy, 2018, 228:1601-1617. DOI:10.1016/j.apenergy.2018.06.134.
[13] Asif M, Tariq A. Correlations of thermal contact conductance for nominally flat metallic contact in vacuum[J]. Experimental Heat Transfer, 2016, 29(4):456-484. DOI:10.1080/08916152.2015.1024352.
[14] Pan X S, Cui X Y, Liu S S, et al. Research progress of thermal contact resistance[J]. Journal of Low Temperature Physics, 2020, 201(3/4):213-253. DOI:10.1007/s10909-020-02497-0.
[15] Wahid S M S, Madhusudana C V, Leonardi E. Solid spot conductance at low contact pressure[J]. Experimental Thermal and Fluid Science, 2004, 28(6):489-494. DOI:10.1016/j.expthermflusci.2003.07.007.
[16] 姬亚萌, 张卫正, 原彦鹏, 等. 复合隔热结构活塞界面材料接触热阻实验研究[J]. 工程热物理学报, 2020, 41(7):1728-1734.
[17] Liu Y W, Ji Y M, Ye F H, et al. Effects of contact pressure and interface temperature on thermal contact resistance between 2Cr12NiMoWV/BH137 and γ-TiAl/2Cr12NiMoWV interfaces[J]. Thermal Science, 2020, 24(1 Part A):313-324. DOI:10.2298/tsci191018470l.
[18] Tang Q Y, He J J, Zhang W F. Influencing factors of thermal contact conductance between TC4/30CrMnSi interfaces[J]. International Journal of Heat and Mass Transfer, 2015, 86:694-698. DOI:10.1016/j.ijheatmasstransfer.2015.03.035.
[19] Zheng X P, Liu D H, Wei D, et al. Experimental investigation of high temperature thermal contact resistance with interface material[J]. Theoretical and Applied Mechanics Letters, 2011, 1(5):051009. DOI:10.1063/2.1105109.
[20] Xing L, Zhang L W, Zhang X Z, et al. Experimental investigation of contact heat transfer at high temperature based on steady-state heat flux method[J]. Experimental Heat Transfer 2010, 23(2):107-116. DOI:10.1080/08916150903402773.
[21] Dou R F, Ge T R, Liu X L, et al. Effects of contact pressure, interface temperature, and surface roughness on thermal contact conductance between stainless steel surfaces under atmosphere condition[J]. International Journal of Heat and Mass Transfer, 2016, 94:156-163. DOI:10.1016/j.ijheatmasstransfer.2015.11.069.
[22] 《中国航空材料手册》编辑委员会. 中国航空材料手册.第1卷.结构钢不锈钢[M]. 北京:中国标准出版社, 2002:658-676.
