飞机地面空调车蒸发器几种典型翅片强化换热效果的仿真比较
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摘要
为了提高飞机地面空调保障的保障效率,节省保障时间,对蒸发器的几种典型翅片的强化换热效果进行了研究,以确定不同种类翅片换热系数的大小,分析各种翅片的强化换热效果强弱。为此,选取了平直形、开缝形、三角形波纹形和正弦波波纹形等4种典型形式的换热器翅片,建立了4种翅片下的换热系数计算模型,利用Sim ulink仿真工具建立了用于换热系数计算的数学模型,并进行了仿真计算与分析。研究结果表明:与其它3种形式的换热器翅片相比,采用平直形翅片的飞机地面空调车蒸发器具有更高的换热系数,在蒸发器换热面积相同时,能够产生更好的制冷换热效果,进而节约航空兵部队和空军场站的飞行保障时间,提高飞行保障效率。
To enhance the effectiveness and save the time of the support of aircraft ground air-conditioning carts,a research on the effect of enhanced heat transfer of several typical fins of evaporators is carried on to make sure of numerical values of coefficients of heat transfer of different kinds of fins and to analyze their effect of enhanced heat transfer. Therefore,four typical fins including flat,slotted,triangle corrugated and sinusoidal corrugated are selected and a computational model of coefficients of heat transfer is built. What's more,a mathematical model used for the compute of the coefficients is built based on Simulink. Also,a simulation calculation and analysis is carried on. The research result shows that,compared with the fins of the other three shapes,the flat fins can make the evaporators in aircraft ground air-conditioning carts achieve higher coefficient of heat transfer. When the evaporators' areas of heat transfer are same,the aircraft ground air-conditioning carts can bring better effect of refrigeration and heat transfer,further,save the support time of air units and air force stations and enhance the support effectiveness.
To enhance the effectiveness and save the time of the support of aircraft ground air-conditioning carts,a research on the effect of enhanced heat transfer of several typical fins of evaporators is carried on to make sure of numerical values of coefficients of heat transfer of different kinds of fins and to analyze their effect of enhanced heat transfer. Therefore,four typical fins including flat,slotted,triangle corrugated and sinusoidal corrugated are selected and a computational model of coefficients of heat transfer is built. What's more,a mathematical model used for the compute of the coefficients is built based on Simulink. Also,a simulation calculation and analysis is carried on. The research result shows that,compared with the fins of the other three shapes,the flat fins can make the evaporators in aircraft ground air-conditioning carts achieve higher coefficient of heat transfer. When the evaporators' areas of heat transfer are same,the aircraft ground air-conditioning carts can bring better effect of refrigeration and heat transfer,further,save the support time of air units and air force stations and enhance the support effectiveness.
引文
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[2]支浩,汤慧萍,朱纪磊.换热器的研究发展现状[J].化工进展,2009,28:338-342.
[3]许伟.几种典型翅片传热及阻力特性的数值研究与分析[D].北京:清华大学,2005.
[4]张科,周志刚,吴兆林.飞机地面空调车的应用与发展[J].低温与超导,2009,37(8):51-55.
[5]唐华杰,吴兆林,周志刚.飞机地面空调车和军用飞机地面液体冷却车的应用及发展[J].流体机械,2006,34(2):72-75.
[6]陈红.制冷系统换热器建模与仿真方法研究[D].重庆:重庆大学,2006.
[7]李妩,陶文铨,康海军,等.整体式翅片管换热器传热和阻力性能的实验研究[J].机械工程学报,1997,33(1):81-86.
[8]丁国良,张春路.制冷空调装置仿真与优化[M].北京:科学出版社,2001.
[9]彭燕.汽车空调换热器分布参数模型及仿真研究[D].重庆:重庆大学,2004.
[10]黄永安,马路,刘慧敏.MATLAB 7.0/Simulink 6.0建模仿真开发与高级工程应用[M].北京:清华大学出版社,2005.
[11]张天孙.传热学[M].北京:中国电力出版社,2006.
[12]边春雷,周俊.航空地面空调车[M].徐州:蓝天出版社,2012.
[13]潘琢金,王丽伟,杨华,等.飞机地面空调车温度控制的仿真研究[J].计算机仿真,2012,29(4):68-71.