传热对微型发动机预混催化燃烧特性影响的研究 *

推进技术 ›› 2014, Vol. 35 ›› Issue (10): 1363-1371.

传热对微型发动机预混催化燃烧特性影响的研究 *

陈俊杰,闫龙飞,宋稳亚,刘志超

河南理工大学机械与动力工程学院，河南焦作 454000;河南理工大学机械与动力工程学院，河南焦作 454000;河南理工大学机械与动力工程学院，河南焦作 454000;河南理工大学机械与动力工程学院，河南焦作 454000

发布日期:2021-08-15
作者简介:陈俊杰(1980—)，男，博士，副教授，研究领域为微尺度燃烧机微型发动机。
基金资助:
国家自然科学基金资助项目(51306046)；河南省教育厅科学技术研究重点资助项目(13A470312)；河南省流体机械及工程重点学科(507907)。

Effects of Heat Transfer on Premixed Catalytic Combustion Characteristics of Micro Engine

School of Mechanical and Power Engineering，Henan Polytechnic University，Jiaozuo 454000，China;School of Mechanical and Power Engineering，Henan Polytechnic University，Jiaozuo 454000，China;School of Mechanical and Power Engineering，Henan Polytechnic University，Jiaozuo 454000，China;School of Mechanical and Power Engineering，Henan Polytechnic University，Jiaozuo 454000，China

Published:2021-08-15

摘要/Abstract

摘要： 为了研究传热对微型发动机燃烧室内甲烷催化燃烧特性的影响，采用CH4和空气的预混合气体，对在活塞上表面和燃烧室顶部涂有Pt-La/γ-Al2O3催化剂的传热情况下的微型发动机的催化燃烧特性进行了实验研究及数值模拟，详细对比分析了3种典型的管壁材料(Si，Fe和矾土)，有、无催化涂层及绝热与传热情况下的微型发动机燃烧室内CH4的催化燃烧特性。结果表明:对于Pt-La/γ-Al2O3催化下自由活塞式的微型发动机，受尺度减小引起的传热损失对催化燃烧过程影响不大；有催化情况下的燃烧效率明显高于无催化，催化燃烧具有更高的燃烧室内温度，可以实现更高的动力和电能输出，微型发动机(MEMS微推进系统)具有更高的输出功率和能量密度；管壁材料为导热系数较小的矾土的催化燃烧效率略高于导热系数较大的Si；微型发动机燃烧室的壁面材料应采用具有承受应力高、适应温度广、机械性能及抗变形能力强等优点的耐火陶瓷。

关键词: 微型发动机；传热；催化燃烧；燃烧特性；预混燃烧；微推进系统

Abstract: To understand the effects of heat transfer on the methane catalytic combustion characteristics inside combustion chamber of micro engine，catalytic combustion characteristics of premixed methane/air mixture inside combustion chamber of micro engine were experimentally and numerically investigated by using the catalysts (Pt-La/γ-Al2O3) which were coated at the upper surface of piston and the top of chamber in heat transfer case. For three kinds of characteristic wall materials (Si，Fe and alumina)，with and without catalytic coatings，adiabatic and heat transfer case，the comparative studies were carried out to clarify methane catalytic combustion characteristics of the micro engine. The results show that the heat loss caused by the scale decreases has little effect on the catalytic combustion process for catalytic (Pt-La/γ-Al2O3) micro free-piston engine. The combustion efficiency and the temperature inside combustion chamber can be improved greatly by catalytic combustion. The output power and the energy density of micro engine (MEMS micro-propulsion systems) can be improved by catalytic combustion. The catalytic combustion efficiency of alumina (smaller thermal conductivity) is slightly higher than that of the Si (larger thermal conductivity). The refractory ceramics with advantages of withstanding high stress，adapting to wide temperature，strong mechanical properties and resistance to deformation，etc. should be used as the wall material of micro engine combustion chamber.

Key words: Micro engine；Heat transfer；Catalytic combustion；Combustion characteristics；Premixed combustion；Micro-propulsion systems

陈俊杰,闫龙飞,宋稳亚,刘志超. 传热对微型发动机预混催化燃烧特性影响的研究 *[J]. 推进技术, 2014, 35(10): 1363-1371.

CHEN Jun-jie,YANG Long-fei,SONG Wen-ya,LIU Zhi-chao. Effects of Heat Transfer on Premixed Catalytic Combustion Characteristics of Micro Engine[J]. Journal of Propulsion Technology, 2014, 35(10): 1363-1371.

参考文献

[1] Kaoru M. Micro and Mesoscale Combustion [J]. Proceedings of the Combustion Institute, 2011, 33(1):125-150.
[2] Femandez-pello A C. Micro Power Generation Using combustion: Issues and Approaches [J]. Proceeding of the Combustion Institute, 2002, 29 (1):883-899.
[3] Yiguang J, Kaoru M. Microscale Combustion:Technology Development and Fundamental Research [J]. Progress in Energy and Combustion Science, 2011, 37:669-715.
[4] Kamijo T, Suzuki Y, Kasagi N, et al. High-Temperature Micro Catalytic Combustor with Pd/Nano-Porous Alumina [J]. Proceedings of the Combustion Institute, 2009, 32 (2):3019-3026.
[5] Karagiannidis S, Mantzaras J. Numerical Investigation on the Start-up of Methane-Fueled Catalytic Microreactors [J]. Combustion and Flame, 2010, 157(7):1400-1413.
[6] 李艳霞, 刘中良, 桑丽霞. 微小型通道几何参数对甲烷燃烧的影响[J]. 工程热物理学报, 2012, 33(12): 2155-2158.
[7] 钟北京, 王建华, 李军伟. 甲烷在过量焓燃烧器内的燃烧特性[J]. 燃烧科学与技术, 2008, 14(6): 481-486.
[8] Zhong B J, Yang F, Yang Q T. Catalytic Combustion of n-C4H10 and DME in Swiss-Rll Combustor with Porous Ceramics [J]. Combustion Science and Technology, 2012, 184(5): 573-584.
[9] Li J W, Zhong B J. Experimental Investigation on Heat Loss and Combustion in Methane/Oxygen Micro-Tube Combustor [J]. Applied Thermal Engineering, 2008, 28(7):707-716.
[10] Kurdyumov V N, Matalon M. Analysis of an Idealized Heat-Recirculating Microcombustor [J]. Proceedings of the Combustion Institute, 2011, 33(2): 3275-3284.
[11] Hsueh C Y, Chu H S, Yan W M, et al. Numerical Study of Heat and Mass Transfer in a Plate Methanol Steam Micro Reformer with Methanol Catalytic Combustor [J]. International Journal of Hydrogen Energy, 2010, 35(12): 6227-6238.
[12] Kim J H, Kwon O C. A Micro Reforming System Integrated with a Heat-Recirculating Micro-Combustor to Produce Hydrogen from Ammonia [J]. International Journal of Hydrogen Energy, 2011, 36(3): 1974-1983.
[13] Che Z Z, Wong T N, Nguyen N T. Heat Transfer Enhancement by Recirculating Flow Within Liquid Plugs in Microchannels [J]. International Journal of Heat and Mass Transfer, 2012, 55(7-8):1947-1956.
[14] Hsueh C Y, Chu H S, Yan W M, et al. Three-Dimensional Analysis of a Plate Methanol Steam Micro-Reformer and a Methanol Catalytic Combustor with Different Flow Channel Designs [J]. International Journal of Hydrogen Energy, 2011, 36(21): 13575-13586.
[15] Smyth S A, Christensen K T, Kyritsis D C. Intermediate Reynolds Number Flat Plate Boundary Layer Flows over Catalytic Surfaces for “Micro”-Combustion Applications [J]. Proceedings of the Combustion Institute, 2009, 32(2): 3035-3042.
[16] Dupont V, Zhang S H, Bentley R, et al. Experimental and Modeling Studies of the Catalytic Combustion of Methane [J]. Fuel, 2002, 81(6):799-810.
[17] Dupont V, Zhang S H, Williams A.Experiments and Simulations of Methane Oxidation on a Platinum Surface [J]. Chemical Engineering Science, 2001, 56(8):2659-2670.
[18] Chen G B, Chen C P, Wu C Y, et al. Effects of Catalytic Walls on Hydrogen/Air Combustion Inside a Micro-tube [J]. Applied Catalysis A, 2007, 332 (9):89-97.(编辑:史亚红)　　　　　　　　　　　　　*　收稿日期:2013-08-03；修订日期:2013-12-08。基金项目:国家自然科学基金资助项目(51306046)；河南省教育厅科学技术研究重点资助项目(13A470312)；河南省流体机械及工程重点学科(507907)。　　　　　作者简介:陈俊杰(1980—),男,博士,副教授,研究领域为微尺度燃烧机微型发动机。E-mail:cjj@hpu.edu.cn