针对航空发动机热端部件的材料特性和工作环境特点,自主研制了带有补偿加热装置的高温、高压接触热导(TCC)测试系统。设计使用纯铜作为热流计材料,使其对于热导率不明确或随温度变化较大的高温合金同样具有较好的适用性。针对航空发动机热端部件常用结构材料GH4169/GH4169在不同界面压力(60～180 MPa)和不同界面温度(150~500 ℃)下的接触热导进行了试验研究。研究结果表明采用该系统进行高温、高压条件下的接触热导试验研究是可行的,利用该测试系统得到了GH4169间的接触热导的变化规律,并分析比较了有、无补偿加热装置条件下的接触热导变化情况。
An experimental setup of high-temperature and high-pressure thermal contact conductance (TCC) with a compensation heater is independently developed according to the material properties and working environments of aero-engine hot-end components. A pure Cu bar is used as the heat-flow meter to measure the axial heat flux, which is also suitable for superalloys whose thermal conductivity is either unclear or exhibits great variation with temperature. An experimental investigation of TCC is conducted with pressed pairs of aero-engine hot-end component structure material GH4169/GH4169 contacts in the range of 150-500 ℃ and 60-180 MPa. The results show that the present experimental setup is feasible for the experimental investigation of high-temperature and high-pressure TCC, and the variation of the TCC across GH4169/GH4169 is obtained. Moreover, the variation of the TCC with and without a compensation heater is studied. The research results may serve as a significant reference for the prediction of aer-oengine thermal properties.
[1] Fieberg C, Kneer R. Determination of thermal contact resistance from transient temperature measurements[J]. International Journal of Heat and Mass Transfer, 2008, 51(5-6): 1017-1023.
[2] Mikic B B. Thermal contact conductance; theoretical considerations[J]. International Journal of Heat and Mass Transfer, 1974, 17(2): 205-214.
[3] 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.
[4] Sridhar M, Yovanovich M. Elastoplastic contact conductance model for isotropic conforming rough surfaces and comparison with experiments[J]. Journal of Heat Transfer, 1996, 118(1): 3-9.
[5] Lambert M A, Fletcher L S, Mirmira S R. Design graphs for thermal contact conductance of similar and dissimilar light alloys[J]. Journal of Thermophysics and Heat Transfer, 2006, 20(4): 809-816.
[6] Barzelay M E, Tong K N, Holloway G F. Effect of pressure on thermal conductance of contact joints. Washington: Property Fairchild Engineering Library, NACA-TN-3295, 1955: 1-52.
[7] 任红艳, 胡金刚. 接触热阻的研究进展[J]. 航天器工程, 1999, 8(2): 47-57. Ren Hongyan, Hu Jingang. The development of thermal contact resistance[J]. Spacecraft Engineering, 1999, 8(2): 47-57. (in Chinese)
[8] 张涛, 徐烈, 熊炜, 等. 接触热阻研究中理论模型的比较与分析[J]. 低温与超导, 1998, 26(2): 58-64. Zhang Tao, Xu Lie, Xiong Wei, et al. Comparison and analysis of theoretical models in the research of thermal contact cinductance[J]. Cryogenics and Superconductivity, 1998, 26(2): 58-64. (in Chinese)
[9] Xu R, Xu L. An experimental investigation of thermal contact conductance of stainless steel at low temperatures[J]. Cryogenics, 2005, 45(10-11): 694-704.
[10] 顾慰兰. 接触热阻的试验研究[J]. 南京航空学院学报, 1992, 24(1): 46-53. Gu Weilan. Experiment on thermal contact resistance[J]. Journal of Nanjing Aeronautical Institute, 1992, 24(1): 46-53. (in Chinese)
[11] 赵宏林, 黄玉美, 徐洁兰, 等. 常用结合面接触热阻特性的试验研究[J]. 西安理工大学学报, 1999, 15(3): 26-29. Zhao Honglin, Huang Yumei, Xu Jielan, et al. Experiment research on thermal contact resistance of normal used joints[J]. Journal of Xi'an University of Technology, 1999, 15(3): 26-29. (in Chinese)
[12] 黄明辉, 张云湘, 胡仕诚. 载荷对接触热导的影响的试验研究[J]. 有色矿冶, 2003, 19(6):34-36. Huang Minghui, Zhang Yunxiang, Hu Shicheng. Research of loading effect on thermal contact conductance by using experimental method[J]. Non-Ferrous Mining and Metallurgy, 2003, 19(6):34-36. (in Chinese)
[13] 刘冬欢, 郑小平, 黄拳章, 等. C/C复合材料与高温合金GH600之间高温接触热阻的试验研究[J]. 航空学报, 2010, 31(11): 2189-2194. Liu Donghuan, Zheng Xiaoping, Huang Quanzhang, et al. Experimental investigation of high-temperature thermal contact resistance between C/C composite material and superalloy GH600[J]. Acta Aeronautica et Astronautica Sinica, 2010, 31(11): 2189-2194. (in Chinese)
[14] 张兴致. 高温合金及钛合金与模具材料接触换热试验研究. 大连:大连理工大学材料科学与工程学院, 2009. Zhang Xingzhi. Experimental research on contact heat transfer between die material and superlloy/titanium alloy. Dalian: School of Material Science and Enginering, Dalian University of Technology, 2009. (in Chinese)
[15] Wang Z R, Zhang W F, Tang Q Y, et al. Progress in thermal contact resistance[J]. Rare Metal Materials and Engineering. (in Press)
[16] Rosochowska M, Chodnikiewicz K, Balendra R. A new method of measuring thermal contact conductance[J]. Journal of Materials Processing Technology, 2004, 145(2): 207-214.
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