文档介绍：南京航空航天大学
硕士学位论文
动力涡轮驱动的逆升压式空气循环制冷系统的设计与优化
姓名:郭侨
申请学位级别:硕士
专业:人机与环境工程
指导教师:刘卫华
20090301
南京航空航天大学硕士学位论文
摘要
电子吊舱安全、高效的工作有赖于优良的吊舱环控系统,动力涡轮驱动的逆升压空气循环
制冷系统就是这样一种能够适用于电子吊舱的环控系统,它具有结构简单,重量轻,代偿损失
小,适应性好等特点。
本文首先建立了动力涡轮驱动的逆升压空气循环制冷系统中进气口、冷却涡轮、压气机、
换热器等设备的数学模型,并根据系统中涡轮,压气机同轴工作的特性提出了系统的匹配计算
方法;然后根据系统代偿损失,在提出系统优化设计方法的同时,对系统展开了相应的优化设
计研究。
研究结果表明:
1、热载荷——随着设计参考点处的热载荷的增大,流过冷却涡轮的流量、系统的总重量和
冷却涡轮引气造成的阻力都将增大;而在最大热载荷处,系统的最大流量和阻力将减小。
2、马赫数——随着设计参考点处马赫数的增大,流过冷却涡轮的流量将减小,且在最大热
载荷处系统的最大流量减小;而系统的总重量和冷却涡轮引气造成的阻力将增加;同时,在最
大热载荷处,系统的最大阻力呈现先减小后增大的态势。
3、高度——随着所选择的设计参考点高度增加,系统的流量、总重量、阻力均减小;但在
系统热载荷最大的时候,系统的最大阻力呈先降后升的态势。
4、基于任务包线的系统优化计算表明:当选择高度为 8km 、马赫为 、系统的热载荷
为 时,系统的代偿损失在给定的任务包线内最低,即可以得到与当前任务包线对应的
系统最佳设计参考点。
关键词:动力涡轮,空气循环系统,压气机,吊舱,制冷系统
I
动力涡轮驱动的逆升压式空气循环制冷系统的设计与优化
Abstract
Eximious environment control system (ECS) of the electronic pod is the precondition of its safe
and high-efficiency work. Reverse-Bootstrap Air Cycle Refrigeration System Driven by Powered
Turbine, which has simple structure, light weight, pensatory loss and good adaptability, is just
the right ECS that can be used in electronic pods.
In this paper, firstly, mathematic models of equipments in Reverse-Bootstrap Air Cycle
Refrigeration System Driven By Powered Turbine, such as air interface, cooling turbine, compressor
and heat exchanger, are summed up. Secondly, putational method, which is used to matching all
parts of systems with each other, is presented based on the characteristic pressor and turbine
share the same rotating-axis. Finally, according to the pensatory loss, an optimization
algorithm method of ECS is presented, based on which the research on ECS optimization is done.
Conclusions are as follows,
1) Heat load——with the increment of heat load at design point, mass flow rate of cooling
turbine, weight of system and the drag force of air interface grow up, and when at the maximum heat
load state, both the maximum mass flow r